278 GEO. H. HORN, M. D. 



H. labratus, Slip., seems to be identical with oppositus, Sat/, which has 

 not been considered specifically distinct from undulatus by Crotch. 



//. peltatus, Shp. — Dr. Sharp writes that this name is equivalent to 

 spurius, Lee. There does not appear to be any special reason for the 

 substitution and the name should be restored. 



H. clypealis, Shp. — This is probably confounded in all cabinets with 

 undulatus, Say. The males are, however, easily distinguished by the 

 claws of the front tarsi being very unequal. 



H. mexicanus, Shp. — A specimen apparently of this species is in my 

 cabinet from Southern California. 



H. rivalis, Gyll. — Of this species obesus, Lee, and congruus, Lee, 

 are synonyms. 



H. despectus Shp., perplexus Slip., rusticus Slip., tenebrosus Lee. 

 (subpubescens Lee), hirtellus Lee. 



I am quite sure that I have identified in our series all the forms above 

 indicated, that is, a certain number can be referred to each name, but the 

 vast mass of specimens is of intermediate material. I think the name 

 tenebrosus, Lee, should be applied to the aggregate. 



//. tristis, Payk. — To this belong varians and subtonsus, Lee 



HYDROTRUPES Sharp. 



H. palpalu, Slip. — A few specimens have been received from the San 

 Bernardino Valley, California. It may be at once known by the quad- 

 rate terminal joint of the labial palpi. The body is black and shining, 

 the elytra very finely punctured, the punctures connected by minute re- 

 ticulations. 



AGABLS. 



A. perplexus, Slip., is suturalis, Crotch. 



A. ambiguus Say, fide Slip. — From specimens sent to Dr. Sharp I 

 learn that the species here identified is the same as discolor, Harris, of 

 our cabinets. Dr. Sharp is now inclined to believe that the species 

 should not be separated from congener, Payk. The latter name should 

 remain with ambiguus and discolor as synonyms. 



A. aeneolus, Crotch. — Dr. Sharp states that the type of punctulatus, 

 Aube, is the same as this. The latter name should be used. 



A. striijulosus, Crotch. — To this nanus, Lee, must be referred. 



A. Watenghami, Crotch, does not appear specifically distinct from 

 confertus, Lee 



A. conftnis, Gyll. — To this ovoideus, Or., must be referred. 



A. Lecontei, Crotch. — This species was originally described as dis- 

 color, Lee The name being preoccupied was changed in the Mel- 



