550 



FAMILY XIX. COLYDIIDJE. 



In habits the Golydiidae are in part carnivorous, as the larvae of 

 certain genera are known to feed upon those of other small, wood- 

 boring forms. About 600 species are known, 70 of which are from 

 North America. These are divided among numerous tribes and 

 genera, many of the latter containing but a single species. The only 

 paper which treats of the f amily as a whole is by 



Horn. — "Synopsis cf the Colydiidae of the V. S.," in Proc. 

 Amer. Phil. Soc, XVII, 1878, 555-592. 



Other short papers by Casey on isolated species have appeared 

 in the Annals of the N. Y. Academy of Science. Fourteen species 

 of the family, distributed among 11 genera, have been taken in 

 Indiana. Several other genera are doubtless represented in the 

 State, and are included in the generic keys which follow : 



KEY TO INDIANA TRIBES OF COLYDIIDJE. 



(/. Antennas inserted under a distinct frontal ridge; front coxa? distant 

 from the inesosternum. 

 b. Last joint of palpi not needle-shaped, 

 c. Front coxa? slightly separated. 



• d. First joint of tarsi short ; form elongate or oval. 



Tribe I. Synchitini, p. 550. 

 dd. First joint of tarsi longer than the second ; form cylindrical. 



Tribe II. Colydiini, p. 553. 

 cc. Front coxa? widely separated ; form elongate, subdepressed. 



e. Antennae arising under a frontal margin; first ventral segment 

 not elongate ; trochanters free. 



Tribe III. Pycnomerini, p. 555. 

 ce. Antennas free at base; first ventral segment elongate; trochanters 

 closely united to the femora. 



Tribe IY. Botiiriderini, p. 55G. 

 bb. Last joint of palpi needle-shaped; antenna? free at base; form short., 

 oval, depressed. Tribe Y. Cerylonini, p. 557. 



ar/. Antenna? inserted on the front; front coxa? inclosed behind by the ineso- 

 sternum. Tribe YI. Muemidiini, p. 557. 



Tribe I. SYNCHITINL 



Elongate or oval species having the surface often ribbed and 

 more or less bristly; tarsi short, the first three joints snbequal and 

 together not longer than fourth. The following genera are known 

 to be or should be represented in Indiana: 



KEY TO INDIANA GENERA OF SYNCHITINI. 



a. Front coxal cavities open behind. 

 1). Antenna? 10-jointed. club solid. 



c. Head beneath without antennal grooves. I. Synchita 



