114 FAMILY IT. — CARABID.E. 



ITTa (- ). DiPLociiiLA iMPKES.si(X)i,Lis ALTERNANS Casey. 



Differs fnnu rypical imprcssirollis only as shown in tal)le. Size the 

 same. 



Vigo and Tjake counties ; rare. May 30-June 7. 



ITS (712). DiPLOCHii^\ oirnsA Lee., Ann. Lye. Nat. Hist., IV. 1848, 320. 



Blaclv, feebly shininj;: antennie reddish-brown; tibi^e and tarsi piceous. 

 Thorax nearly one-half wider than long, base wider than ape.K. sides feebly 

 onrved. basal impression;-^ deep. Elytral strife not punctured; intervals 

 feebly convex, the third without dorsal pimcture. Length 11-12 mm. 



Rare; two specimens from Vigo County. April 11. 



XXIX. Dic^LUS Bon. 1813. (Gr., "two + pitted.") 



Black, violet or bronzed-purple beetles of large size, possessing 

 the characters of the tribe Licinini as above given. From allied 

 genera they are separated by the absence of dorsal punctures and 

 by having three joints of the antennae smooth. In our species the 

 elytra are deeply striate, with the seventh interval carinate from 

 the humerus to a varying distance, and with the eighth and ninth 

 stri:f w^ell separated. The generic name refers to the impressions 

 uciw base of thorax. Their food has been shown by Dr. Forbes to 

 lie wholly of insect origin, thus proving their beneficial habits. They 

 occur beneath logs and stones, usually in high, dry, open woods. 

 Seventeen species are known from the United States. Of these 

 nine have been taken in Indiana, while another perhaps occurs. 

 For literature see : 



//orw.— "Synoptic Table," in Bull. Brook. Ent. Soc, III, 

 1880, 51. 



Wickham. — "Coleoptera of Northeastern America," in Joum. 

 N. Y. Entom. Soc. IV, 1896, 44. 



KEY TO INDIANA SPECIES OF DICiELUS. 



II. Klytral intervals very irregular. interrui)te(l by large pinn-luies. 



179. SCULPTILIS. 



(/(/. Klytral iiiiervals I'egnlar, not interrupted. 



h. Thorax distinetly iian-(n\er at apex than base. 

 c. Elytra nel nnifiU'iii black ; length 18-2.'( luiii. 



(t. Elytra violaceous or purplish. 180. pukpurati s. 



(Id. Elytra brilliant brassy or cupreous. sPLENDiors. 



cc. Elytra black. 



e. Intervals of elytra alternately broader and more convex; hu- 

 meral carina very long. 181. furvus. 

 ce. Intervals of elytra equal. 



/. 'J'wo bristle-Iiearing punctures (in margin of thorax near mirl- 

 dlc: foi-m iiindoratoly eloiignle. (he elytral intervals ecpml. 



182. eIjOngattts. 



