350 Catalogue of the Geodcphagous Coleopiera. 



anguHs posticis obtusis, leviter rotundatis ; linea arcuata plici- 

 formi obsoleta, margin! antcriori approximata, impressione trans- 

 versa anteriore indistincta, posteriore satis profunda, basalibus 

 rotundatis, pi^ofundis, impunctatis, bistriatls, striis postice arcua- 

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

 latitudine fere duplo longiora, bumeris satis distinctis ; opacius- 

 cula, profunda striata striis impunctatis versus apicem minus 

 impressis, interstitiis accurate planis, 7mo prope 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 iitrinque striate, carinaque externa munito. 



t Elytris leviter striato-punctatis, stria abbreviata rudimentali vix 

 conspicua, inter Imam et 2udam sita; interstitio 3io unipuncta- 

 to : habitus ovalis, subelongatus, crassiusculus. 



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



amevlcana. Dej. Sp. Gen. Habitat in provinciis austra- 

 libus, et in Texas : a Dom. Dr. Engelman benevole 

 data. 



2. sigillata. Say. Trans. Am. Phil. Soc. Vol. II. 



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



3. *seximpressa. Nigra, opaciuscula, tJiorace subquadrato, 



lateribus magis rotundaio, basi titrinque triimpresso, 

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

 Rocky Mountains, prop)e Long's Peak. 

 Nigra, vix nitida ; paljn picei : mandibulce glabra-. Caput lat- 

 itudine sesquilongius,lasve, impressionibus frontalibus rectis,pro- 

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

 Thorax subquadratus, antice posticeque truncatus, lateribus valde 

 rotundatus, postice levissime retractus, anguHs posticis leviter 

 obtusis, apice rotundatis ; margine tenui reflexo ; disco leviter 

 convexus ; impressione transversa anteriore valde profunda, lin- 



