Till-: DARKLING ISKKTLKS. 1207 



KKY TO (IK.NKKA Oh" IiOI.KTOl'1 1 A(i I M . 



n. AiiteniKo Hi-j(iinU'(l ; eyes not entirely divided. 



XXIII. I'.OI.KTOTIIKltrs 



<ni. Antennae 11-joiuted; eyes completely divided. XXIV. I>OLETOPHAGI s. 



XXIII. I>OU<;TOTII[<;RUS (.ande/e. 18(J1. ((Jr., " fungus I to 



hunt." 



fn this genus the males have two lionis, slightly curved <ind 

 broader at, tip, projecting forward I'roin the thorax, and a short 

 horn, bifid at tip, on the clypeus. The females have the thorax 

 strongly tubercidate. One species is known. 



234G (7540). BOLETOTHEKUS BIFURCUS Fab.. Ent. 



Syst. Supp., I, 1798, 40. 



Oltlviig. robust. I'lai-k or brownish-black, 

 opaque. Thorax three times as broad as long, mar- 

 gins broadly flattened and serrate with rounded 

 teeth ; the disk with horns or tubercles as above 

 mentioned. Elytra each with four rows of large. lig ri ^ y ? 



irregular tubercles with smaller ones on the inter- (After Emmcns ) 



vals. Length 10-11.5 mm. (Fig. 565.) 



Throughout the State; frequent. May 4- October 17. When dis- 

 turbed they feign death, their form and roughened surface blending 

 with the irregularities on the surface of the fungi in such a manner 

 as to render the beetles almost invisible. 



XXIV. BOLETOPHAGUS Illig. 1798. (Gr., "fungus + eating. ") 



Two species are known from the eastern United States, both of 

 which probably occur in Indiana, though but one has as yet been 

 taken. The head and thorax are not horned in either sex. 



KEY TO SPECIES OF BOLETOPHAGUS. 



a. Thoracic disk with numerous tubercles; the margin strongly crenulate 



and deeply notched in front of hind angles. 2o47. CORTICOLA. 



int. Disk of thorax coarsely punctured, not tuberculate ; sides regularly 



rounded, not crenulate. DEPRESSUS. 



L'.">47 (7541). BOLETOPHAGVS CORTICOLA Say. Journ. Phil. Acad. Nat. Sci., 



V. 1820, 2::t>; ibid. I, 115. 



Oblong, robust. Black or brownish-black, opaque. Head with sides 

 prominent, the surface granulate. Thorax three times as broad as long, 

 deeply emarginate in front; surface with numerous granules or small tuber- 

 cles. Elytra with rows of widely interrupted elevated lines or elongate 

 tubercles, with smaller ones in the intervals. Length S-S.5 mm. 



Lake County : scarce. May 28. Taken from beneath bark of 

 birch and pine. 



