Megalopinus EICHELBAUM 1915

Preliminary key to the neotropic Megalopinus EICHELBAUM 1 Sides of abdominal tergites coarsely and densely punctate (figs 8, 9), anterior margin of pronotum concave medially (fig. 63): araucanus -group.................................................2 - Sides of abdominal tergites impunctate or with few shallow punctures (figs 10-12), anterior margin of pronotum evenly convex.......................................................................4 2 Elytra black or dark brown. Pronotum (fig. 63). Abdomen (fig. 8). 2.3-3.4mm (FB 1.7- 2.0mm), Chile ........................................................................ araucanus (COIFFAIT & SÁIZ) - Elytra with a reddish/yellow pattern...................................................................................3 3 Sides of pronotum with mall obtuse denticles, anterior quarter reddish yellow (fig. 1). 4.4-5.0mm (FB 3.0mm). Argentina, Chile .................... sanguinitriguttatus (SCHEERPELTZ) - Sides of pronotum with strong lateral spines (fig. 7), anterior quarter black.: E (fig. 199). 3.5-4.3mm (FB 2.1-2.6mm), Chile ............................................... rugipennis nov.sp. 4 Head small, less broad than pronotum, eyes smaller (fig. 5)...................... peploides -group, see key in PUTHZ 1994b (testaceus SAÍZ and the 3 nov. spp. missing there) angustus PUTHZ [1.9-2.5mm (FB 1.2-1.4mm), E (fig. 2, PUTHZ 1994b, Brazil] ashei PUTHZ [2.5-2.9mm (FB 1.6mm), E (fig. 5, PUTHZ l. c.), Mexico] brzoskai nov.sp. [2.3-2.6mm (FB 1.5-1.6mm), Peru] castaneus PUTHZ [2.6-2.9mm (FB 1.6mm), Costa Rica] fascifer nov.sp. [2.7-2.9mm (FB 1.8-1.9mm), elytra (fig. 106), Bolivia] inka PUTHZ [2.7-3.1mm (FB 1.8-1.9mm), E (fig. 4, PUTHZ l. c.), Peru, Ecuador] lescheni PUTHZ [2.2-2.5mm (FB 1.6mm), Peru] morator PUTHZ [1.9-2.2mm (FB 1. 35mm), Mexico, San Salvador, Costa Rica] ogloblini (BERNHAUER) [2.3-2.8mm (FB 1.6mm, Argentina, Brazil, Ecuador, Peru] paraguyanus PUTHZ [2.5-2.7mm (FB1.6mm), E, fig. 1, PUTHZ 1984), Paraguay] pecki PUTHZ [2.7-3.1mm (FB 1.8mm), Colombia] peploides (SHARP) [2.4-2.7mm (FB 1.7mm), habitus (fig. 1, PUTHZ 1994b), Panama, Costa Rica, Venezuela) puncticollis (L. BENICK) [2.2-2.5mm (FB 1.4mm, fig. 5), Costa Rica, Panama, El Salvador, Honduras, Mexico,? Ecuador] pusillus PUTHZ [2.0-2.4mm (FB 1.4-1.5mm), Mexico] rufobrunneus nov.sp. [2.6mm (FB 1.6mm), elytra (fig. 107), Venezuela] sulcatus PUTHZ [2.3-2.7mm (FB 1.5-1.7mm), Costa Rica, Panama,? Venezuela] testaceus SAÍZ (2.8-3.0mm (FB 1.8-1.9mm), E (fig. 198), Chile] - Head broader than pronotum, eyes large (e. g. fig. 34).......................................................5 5 Abdomen with variegate yellowish patterns. Tergite 7 ± largely yellowish laterally (if uncertain, tergite must be examined separately). E bilaterally symmetric ............................ ....................................... pulcher -subgroup of the caelatus -group (see separate key below) - Abdomen black, paratergites reddish yellow, light brown or black. Tergite 7 black or brownish laterally (if uncertain, tergite must be examined separately)...............................6 6 Brachypterous, apical membranous fringe on tergite 7 completely absent or very narrow (reduced).................................................................................................................7 - Macropterous, apical membranous fringe on tergite 7 broad and distinct.........................10 7 Apical membranous fringe on tergite 7 completely absent.................................................8 - Apical membranous fringe on tergite 7 very narrow (reduced)...........................................9 8 Pronotum with a prominent spine anteriorly. FB 2.4-2.6mm. Ecuador, Colombia ............... ................................................................................................................. bispinus PUTHZ - Pronotum without a prominent spine. FB: 1.9-2.1mm. Bolivia ............ monticola nov.sp. 9 Elytra reddish yellow. FB: 1.9-2.0mm. Bolivia ......................... callicerus (BERNHAUER) - Elytra black with a reddish yellow spot mediolaterally. FB: 1.9mm. Colombia ................... ................................................................................................................. alticola nov.sp. 10 Pronotum with one sharp and deep latero-transverse furrow medially (fig. 78).: Aedoeagus asymmetrical, in most cases also with asymmetrical parameres ........................ ...................................................................... incisicollis -group (separate key see below) Note: M. nodicollis nov.sp. (Ecuador) of the punctatus- group closely resembles species of the incisicollis -group, but has an impunctate pronotum (fig. 77) and a completely different aedeagus (fig. 254) see below again - Pronotum with two ± deep, but not sharp latero-transverse furrows medially (e. g. figs 4, 29).................................................................................................................................11 11 Elytra impunctate, without or with 1(2) longitudinal sulci................................................12 - Elytra punctate, mostly with 2 variable longitudinal series of punctures (which may be reduced into different degrees)..........................................................................................13 12 Tarsal segment 4 narrowly lobe-like, nearly as long as the last segment and situated below that segment (fig. 25). E bilaterally symmetrical........................................................ .......................................................................... cephalotes -group (separate key see below) Note: M. nodicollis nov.sp. (Ecuador) of the punctatus- group closely resembles species of the cephalotes -group, but has deep and very sharp latero-transverse medial furrow on the pronotum and an asymmetricalaedeagus (fig. 254), see below again - Tarsal segment 4 simple and small. Edeagus slightly asymmetrical........... praeditus -group campbelli nov.sp. [3.3-3.8mm (FB 2.1mm), elytra (fig. 108), E (fig. 256), Colombia] obliquestriatus (BERNHAUER) [3.5-4.3mm (FB 2.3-2.5mm), elytra mainly reddish, Venezuela, Ecuador, Peru, Paraguay] praeditus (SHARP) [elytra with a reddish spot lateromedially, 4.5mm (FB 2.4mm), E (about as in fig. 256), Panama, Costa Rica] 13 Paratergites yellowish to light brown. Elytra with two longitudinal series of punctures, without or with 2 and more punctures on declivous lateral portion. E bilaterally symmetrical without large strongly sclerotized internal sclerites: caelatus group s. str....14 - Paratergites dark brown to black. Elytra without or only with 1 puncture on declivous lateral portion. E bilaterally symmetrical with strong internal sclerites or strongly asymmetrical with strong internal sclerites.......................................................................54 14 Frons finely punctate anteriorly or only on antennal tubercles, coarsely on rest of surface...............................................................................................................................15 - Frons coarsely punctate, few small punctures may be present on antennal tubercles.......17 15 Metafemora blackish in about apical third (note: this character may be difficult to identify in immature specimens). E (fig. 196). 4.6-5.0mm (FB 2.5-2.8mm). Panama, Nicaragua ...................................................................................................... momus nov.sp. - Metafemora reddish yellow or reddish brown, whole anterior portion of frons finely punctuate...........................................................................................................................16 16 Elytra with a broad subhumeral reddish yellow band in anterior half, sternite 8 with a narrow reddish yellow spot laterally. 4.8-5.5mm (FB 2.5-2.9mm). Brazil, Ecuador ............ ........................................................................................................................ batesi nov.sp. - Elytra completely reddish with four small blackish spots, sternite 8 completely black. 4.6-5.0mm (FB 2.8-2.9mm). E (fig. 175). Paraguay ............................. rufulipennis nov.sp. 17 Frons with conspicuous, very long setae (fig. 29). 3.2mm (FB 1.9mm). Costa Rica ............ ................................................................................................................ pilosifrons nov.sp. - Frons without conspicuous setae.......................................................................................18 18 Segment 11 of antennae (in both sexes) asymmetrical (fig. 18). 3.7-4.0mm (FB 2.2- 2.4mm). Paraguay ................................................................................... antennatus nov.sp. - Segment 11 of antennae symmetrical................................................................................19 19 Elytra with more than two punctures on declivous sides below humeral angle................20 - Elytra without or at most with one puncture on declivous sides below humeral angle...........40 20 With metallic luster. 3.0-3.3mm (FB 2.0mm). Guatemala ........................ porcatus (SHARP) - Without metallic luster......................................................................................................21 21 Smaller, <2.5mm (FB <1.55mm)......................................................................................22 - Larger,>3.5mm (FB> 1.55mm).......................................................................................24 22 Elytra reddish yellow at base and with some punctures in sutural third. 2.2-2.5mm (FB 1.4-1.5mm). French Guiana, Brazil ........................................................... minutulus nov.sp. - Elytra otherwise, no punctures in sutural third..................................................................23 23 Elytra with a broad reddish yellow spot mediolaterally. Antennal segment 11 symmetric. 2.1-2.4mm (FB 1.4mm). Ec

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