192 COLEOPTEItA OF NORTH AMERICA. 



' Head elongated. Tanaops. 



Head short ; 



Epistoma large, in part corneous. Malachius. 



Epistonia short, entirely membranous. Hapaloruinus. 



inserted at the sides near the anterior margin of the front ; 

 Elytra nearly or quite covering the abdomen ; 

 Anterior tarsi slender and simple in both sexes ; 



Epistoma membranous, ventral segments partly membranous. 



Anthocomus. 

 Anterior tarsi slender, second joint oblique and prolonged in % ; 

 Epistoma membranous ; ventral segments partly membranous. 



Attalus. 

 Epistoma corneous, indistinct ; ventral segments entirely corneous. 



Acletus. 

 Anterior tarsi stouter, not conspicuously deformed in the male ; epis- 

 toma not very distinct ; ventral segments corneous ; 

 Body oval, or ovate, legs moderate. Ebaeus. 



Body elongate, legs long. Microlipus. 



Elytra short ; anterior tarsi of the % with the second joint obliquely' di- 

 lated and prolonged ; epistoma large membranous ; abdominal seg- 

 ments entirely corneous. E.ndeodes. 



Tanaops, Hapalovhinus, Microlipus, and Endeodes are found 

 only in California ; Acletus has occurred only at Lake Superior. 

 The other genera are widely diffused except Malachius, of which 

 one European species, 31. aeneus, has been introduced in Massa- 

 chusetts. 



The female of Microlipus is without wings, and was described 

 by me as belonging to Charopus, from which it differs by having 

 the joints 1 — 4 of the anterior tarsi equal in length. The species 

 of Endeodes were formerly considered by me as belonging to 

 Atelestus. 



The species here referred to Attalus correspond to groups 2 

 and 3 of Anthocomus as established by Erichson, and to Scaloji- 

 terus Motsch. Duval has shown that they do not differ generically 

 from the type of Attalus, and has very properly combined them 

 with that genus. Tanaops corresponds with Gephalistes Motsch. 



Tribe II.— DASYTINI. 



Body without lateral vesicles ; angles of the prothorax not 

 fissured beneath ; front prolonged into a short beak in our species ; 

 antennae inserted on the sides of the head, in front of the eyes, 

 which are finely granulated. Claws of the tarsi either with or 

 without membranous appendages. 



