124 



Tribe IV.--Corylophina. 



There is considerable diversity in the fonn of the thorax among the genera 

 which I have placed in this tribe. In some of them the posterior angles are pro- 

 duced after the manner of the Seriiodrrina, but all differ from that tribe in having 

 entire, not truncate, elytra. They vary very much iu the number of the joints of 

 the antennae, but among the Corylophidce this can only be regarded as a generic 

 character. 



GENERUM EPITOMA. 



Corpus pubescens, postice attenuatum. Pronoti anguli posteriores pro- 



ducti. Antennie ll-articulatas, art. 5 et 7 valile incrassati . Microstagetus. 



Corpus ovale. Tibia? anteriores longa;, curvjita-. Pronoti anguli pos- 



teriores acuti. Auteniiie H-articulatas, art. 5 exiguus . . . Oligarthrum. 



Corpus subhemispbericum, nitidis.simum. Pronotum antice abrupte 

 deflexum, angulis posterioribus baud productis. Antennae 10- 

 articulatie, art. 6 maguus ........ Peltinus. 



Corpus plerumque postice attenuatum. Pronoti auguli posteriores valde " 



proJucti. .\nteuuffi 9-articulala?, art. 5 incrassatus . . . Corylophus. 



Corpus subhemisphericum, ovatum, uitidum. Prouoti anguli posteri- 

 ores product!. Antenna; 10-articulatte, art. 6 elongatus . . Microum. 



Corpus plerumque bemisphericum, nitidum. Pronoti auguli posteriores 



plerumque obtusi. Antenna; ll-articubita; .... Corylophodes. 



Corpus subberai.spht'ricum, nitidissimum. Pronotum magnum, anguhs 

 posterioribus acutis. Antenuffi ll-articulata9, art. 1 permagnus, 

 7 elongatus et incrassatus ........ Catoptyx. 



Corpus ovale. Pronoti anguli posteriores baud producti. Anteume 9- 



articulata* Lepadodes. 



Corpus subovatum. Pronotum magnum, angulis posterioribus acutissimis, 



longe productis. Antenna; ll-articulatii;, art. 7 valde elongatus Hoplicnema. 



Corpus subhemispbericum. Pronotum maguum, angulis posterioribus 

 parum productis. Antenna; ll-articulatas, art. 7 magno, elon- 

 gato, incrassato ......... Lewisium. 



MICROSTAGETUS. PI. III., C. 

 Microstarictus, Wollaston, Ann. and Mag. Nat. Hist. (3) viii. p. 103, 18G1. 



Corjnis subovatum, antice latissimum. 



Caput magnum, latum, sat expositum, deflexum, parte gulari convexa ; oculis 

 magnis, prominentibus ; antennis juxta oculos insertis. 



Antenna' (PI. III., C, fig. 7) undecim articulata;; 1 permagno, crasso, recurvato ; 

 2 turgide ovato, primo plus quam duplo breviori ; 3 et 4 multo gracilioribus, 

 parvis, brcvibus ; 5 sat magno, transverse, intus valde producto ; 6 parvo, 

 cyathiformi ; 7 permagno, transverse oblougo, intus longe producto ; 8 parvo, 

 brevi, cyathiformi ; 9-11 validissime incrassatis, clavam foliatam formantibus, 

 cujus articulus intermedins cseteris brevior, apicalis caeteris major et subovatus 

 existit. 



Palpi maxillnres (PI. III., C, fig. 5, w) magni, robustissimi, 4-articulati ; 1 minuto, 

 subtriangulari ; 2 permagno, inflate turgido, antice contracto, apice leviter 

 e.xcavato ; 3 brevissimo, transverso ; 4 elougato, sat gracili, obtuse subconico, 

 apice excavato, angulis i)roductis, acutissimis. 



Palpi hibiales (PI. III., C, lig. G, m) breves, crassi, triarticulati ; 1 exiguo ; 2 magno, 

 subcylindrico ; 3 secundo vix angustiori, duplo breviori, subquadrato, margine 

 anteriori setis perbrevibus flmbriata. 



