142 Mr. Crotch's DcscnjJitoiis of 



family, by the square emargination of tJie clypeus ; it is 

 coniiiied to Mexico, and Central and South Aiueiica. 



The species are very embarassing, as the variation of 

 colour is very great ; further material is required to decide 

 some of the questions. 



The species have a wide range, several occurring from 

 the Amazons through Cayenne to Ecuador and Bolivia. 



2. Pselajphacus distortus, sp. nov. 



P. curvipcdi simillimus, thorace crebrius punctato, fas- 

 ciis elytrorum (priesertim ultima) integris, vel vix denti- 

 culatis. L. c. 6-7^ lin- 



Mexico. Coll. Crotch. 



The Nicaraguan specimens differ from the Mexican in 

 having the interstices scarcely punctulate, and the two 

 medial fasciae decidedly denticulate. 



3. Psdaphacus vitticollis, sp. nov. 



P. dcntato affinis, thorace fulvo, margine tenui, vitta 

 discoidali, punctoque utrinque nigris ; elytris basi nigra, 

 annulo apicali incompleta. L. c. 5^-6 lin. 



N. Granada. Coll. Crotch (lieiche, Chevrolat). 



The Nicaraguan specimens differ from those from New 

 Granada in that the central vitta of the thorax is reduced 

 to a basal triangle, 



4. Psclcqyhamis signatns, Guer. Eev. Zool. 1841, p. 158. 



Also found in Cayenne, Amazons, Columbia, Ecuador 

 (Buckley), and Bolivia. 



Syn. : P. siynatipcnnis, Lac. Mon. Erot., p. 84 (1842). 



5. Psdaphacus Nicaragua, sp. nov. 



Oblongus, subparallelus, niger, nitidus, capite sat crebre 

 punctato ; thorace quadrate, lateribus rotundatis, ante au- 

 gulos posticos angulos sinuatis, parce subtiliter punctato, 

 punctorum majorum seriebus dorsalibus 2 ; scutello nigro, 

 lievi : elytris nigris, subtilissime parce punctulatis, leviter 



