214 COLEOPTERA OF NORTH AMERICA. 



Head elongate, first joint of antenna? cylindrical. Trophimus. 



Anterior tarsi 5-jointed in both sexes; 

 Elytra short. 



Body apterous in both sexes ; abdomen without bristles. 



Endeodes. 

 Abdomen with long bristles ; % winged. Chaetocoelus. 



Elytra long. 



Anteiuice inserted on the front nearly between the eyes ; 



Second joint of anterior tarsi '^ simple. Malachins. 



Second joint slightly covering the third ; head long. Tanaops. 

 Antennje inserted at the anterior edge of the front near the sides. 

 Anterior tarsi % simple. 



Form elongate," legs long; anterior tarsi % somewhat dilated; 

 females apterous. Microlipus. 



Form broader, legs moderate ; females winged. 



Elytra similar in the sexes. Anthocomus. 



Elytra prolonged at tip in the male. Pseudebseus. 



Anterior tarsi % with second joint prolonged over the third ; 



elytra similar in the sexes. Attains. 



Hapalorhinns has been united with Malachius and Acletus with 

 Attains. The species I'ornierly referred tu Ebaeus have been 

 removed to Pseudebaeus. 



Collops and Attains are widely diffused, Endeodes, Tanaops, 

 and Malachius (excepting M. aeneas which has been introduced) 

 are peculiar to the west coast fauna, the other genera belong to 

 the Atlantic region, and Chaetocoelus to Texas. 



Teninopsophus is remarkable for its ant-like form, a character 

 repeated by Myrmecospectra llotach., a Ceylon genus, having 

 antenna as in Collops. 



Tribe II.— DASYTIIVI. 



Body without lateral vesicles ; angles of the prothorax not 

 fissured beneath; antennae inserted on the sides of the head, 

 in front of the eyes, which are fiuely granulated. Claws of the 

 tarsi either with or without membranous appendages. 



In some genera of this tribe, the middle and hii.d coxa? resemble 

 those of Byturus, which, however, differs by the anterior coxae 

 being separated by the prosternuni, and by the tarsi being lobed 

 beneath. To add to the resemblance, the sixth ventral segment 

 is frequently by no means distinct. 



Our genera are as follows, all having the last joint of the max- 

 illary palpi nearly cylindrical. 



