502 FAMILY XV. (JOUYLOP1T.II). K. 



The members of this family have been by most authors consid- 

 ered as belonging to a subdivision of the Coccinellidse, but the form 

 of the mandibles and the structure of the tarsi are sufficient to 

 separate them. Moreover, they differ widely in food-habits. How- 

 ever, they are related closely in structure not only to the Coccinel- 

 lida- but. also to the Silphida', so that they are assigned a place be- 

 tween those two families. 



The principal literature treating of the family is as follows: 



fjcCon/t. "Synopsis of rhe Corylophi," in 1'roc. IMiil. Acad. 

 Nat. Sri., VI, 1S52, 141-145. 



r^.s-r //.--" Synopsis of the ( 'orylophida-, " in Journ. N. Y. Ent. 

 Soc., VIII. 1900. 60-75. 



About 200 species of the 

 family are known. Casey 

 in his Synopsis lists 54 spe- 

 cies, divided among ten 

 genera., from the United 



I.-. Si. Antpnme of r,,r.y//i/i ;,/. (After Casey.) States. Of tllCSC eight Spe- 



cies, belonging to five genera, have been taken in Indiana, while a 

 number of others may occur. 



KEY TO INDIANA GENERA OF CORY LOP III D.E. 



o. Antennae 10- or 11-jointed; thorax hood-like, completely concealing the 



head. 



h. Body rounded, convex, glabrous; front coxa? long and narrow, en- 

 closed within deep cavities; antenna' 11-jointed. the third joint 

 elongate but shorter than the second. 



c. Head very deeply inserted within the thorax, the front margin of 



which is evenly rounded and strongly descending; post coxa! 



plates large with rounded outline; labruni rounded and snb- 



quadrate. I. CORYLOPUODKS. 



<<: Head less concealed by the overhanging margin of the thorax, but 



not visible from above; post coxal plates very short; labruni 



small, triangular, its apex acuminate; tarsi short, dilated: bin I 



angles of thorax acute, feebly prolonged. II. GRONENTS. 



l>h. Body oblong or oval and pubescent ; front coxre oblong or globular. 



'/. Hind angles of thorax distinctly prolonged backwards and acute; 



antenn.-e 10-jointed (Fig. 180, No. '.'.) : front coxae short, oblong. 



III. SERICODEKI s. 

 '/'/. Hind angles of thorax not prolonged backwards, rectangular; front 



coxa' larger, less deeply imbedded ; globular. 



e. Antenna- 11-jointed; prosterimm well developed in front of coxa-. 

 f. Body elongate, subdepressed. the sides subparallel ; basal joint 

 of hind tarsi short, scarcely as long as the next two com- 

 bined. SACIUM. 



