350 Catalogue of the Geodephagous Coleoptera. 



angulis posticis obtusis, lcviter rotundatis; linea arcuata plici- 

 formi obsolete, margini anterior! approximata, impressione trans- 

 versa anteriore indistincta, posteriore satis profunda, basalibus 

 rotundatis, profundis, impunctatis, bistriatis, striis postice arcua- 

 tim connexis. Elytra thorace non latiora, planiuscula, ovalia, 

 latitudine fere duplo longiora, humeris satis distinctis ; opacius- 

 cula, profunde striata striis impunctatis versus apicem minus 

 impressis, interstitiis accurate planis, 7mo propo basin levissime 

 elevato. 



Optime facit transitionem ad § 4, haec species. 



% 4. Thorace subquadrato, postice leviter retracto, lateribus ro- 

 tundatis, margini tenui reflexo, versus basin paulo latiore, 

 basi utrinque striato, carinaque externa munito. 



t Elytris leviter striato-punctatis, stria abbreviata rudimentali vix 

 conspicua, inter Imam e t 2»dam s ita; interstitio 3'o unipuncta- 

 to : habitus ovalis, subelongatus, crassiusculus. 



1. h e r O S. Say. Journ. Ac. Nat. Sc. Vol. III. 



atnericana. Dej. Sp. Gen. Habitat in provinces austra- 

 libus, et in Texas : a Dom. Dr. Engclman benevolo 

 data. 



2. S i gi 1 1 at a. Say. Trans. Am. Phil. Soc. Vol. II. 



vidua. Dej. Sp. Gen. Habitat in provinces mediis rarius. 



3. Seximpi'CSSa. Nigra, opacimcula, thorace subquadrato, 



lateribus magis rotundalo, basi utrinque triimpresso, 

 elytris planiusculis . Long. -62, lat. -22. Habitat ad 

 Rocky Mountains, prope Long's Peak. 

 Nigra, vix nitida; palpi picei : mandibula glabra . Caput lat- 

 itudine sesqui longius.loeve, impressionibus frontalibus rectis, pro- 

 fundis, linea transversa tenui, levi ; oculis parvis prominulis. 

 Thorax SubquadratUS, autice posticeque truncatus, lateribus valde 

 rotundatus, postico levissime retractus, angulis posticis leviter 

 obtusis, apicc rotundatis; margine tenui reflexo; disco leviter 

 convexus ; impressione transversa anteriore valde profunda, lin- 



