r)()L' 



FAMILY XV. — CORVL()PinD-T3. 



Tlic nicnilicrs of tliis family liavc !)('t'n by most authors coiisid- 

 ert'd as l)('lon<iiiig to n, sulxlivi.sion ot llic Coceinellida?, l)ut the form 

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

 sf^parate them. INForeover, they differ widely in food-habits. How- 

 e\-ei'. they are i-elatcd closely in sti'iicture not only to the Coccinel- 

 li(l:e lint also to the Silphidie. so tlial th(\v are as>ii>-n<Ml a, place be- 

 Iwcfii those two familie-;. 



The principal literature treating' of the family is as follows: 



LcCoitlc. — "Synopsis of the Ci.rylophi.'" /// Pro;-. Phil. Acad. 



Nat. Sci., VI, 1852. 141-145. 

 Cnscij. — '>'ynopsis of the Corylophida'." i)i Journ. X. Y. Ent. 

 Soc. VIII. 1000. (id-To. 



About 200 species of the 

 family are known. Casey 

 in his Synopsis lists 54 spe- 

 cies, divided among ten 

 g'enera, from the United 



Fig. 180. Autvnme oi CorylvjJiulir. (.\fter Casey.) StatCS. Of thcSC cicht SpC- 



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

 number of others mav occur. 



KEY TO IXDIAXA (JKNERA OF CORYLOPHID.E. 



'/. Antenn.-c 10- or 1 l-jointed ; tiiorax liooil-like. coiiii)](>tely concealing the 

 head, 

 ft. Body rounded, C(»nve.\, glabrous; front cox;c long and narrow, en- 

 closed within decj) cavities; antenna* ll-.iointed. the third .ioint 

 elongate hut shorter than the second. 

 e. Head ver.v deejily inserted within the thorax, the front margin oi' 

 which is evenly i-onnded and strongly descendin,g; ]iost coxa I 

 plates large with rounded (utliiie; lahiMuii rounded and sub- 

 quadrate. I. COHYLOl'HODES. 

 cc. Head less concealed by the ovcrlianging margin of tlie thorax, but 

 not visible from .above; jiost cox.mI jihites vei'y slmrt ; labrum 

 small, triangular, its apex ncumiiialc; tarsi short, dilated; himl 

 angles of thor;ix acute, feebl.v jirolonged. II. (Jkoxevis. 

 1)1). I'.ody oiijong or oval and pubescent; front coxa^ oblong or globular. 

 '/. Hind angles of thorax distinctly ])r()longed backwards and acute; 

 antenna' 10-.jointed (Fig. 180, No. 'A) ; front coxje short, oblong. 



III. Sericoderus. 

 '/*/. Hind .-ingles of thor.ax not i)rolong(>(l backwards. r(M't;inguI;ir ; front 

 (•ox;c larger, less deeply imbedded ; gloliuliu-. 

 c. .\ntenn:c ll-Jointed; prosternum well develojied in front of coxa'. 

 /'. r.ixly elong.ite. subdeiiressed, the sides subi)arallel ; basal .joint 

 • if iiind tarsi short, scarcely as long as the next two com- 

 bined. Sacium. 



