■nil': ('Ai{i;ioN' MKi'/n.r.s. 



27:? 



Horn. "Syiiuj.sis iW Uic SiliiliKhr <A' llic I'liitcd Stnlcs with 



referenco to the Oonora of other ('oinilrics." /// 'riviiis. Amer. 



Eiit. Soo.. VTTT. 1880. 21J)-;V22. 



Nearly !)(>() species of Silphidie ;ir" known, altoiil 12.") ol' which. 



(Iisti-il)iit(><l ainoiiu' ^^l ii'<^nera. are rnim Ndi-lh .\iiierica. Ilni-ii. m 



his S\ii(>!)sis. divided the family aitiMiio- six trilxs. Four of these 



are known In he i-e|)re.sented in Indiana, whih' a siii^'U' species of aii- 



olJKM" may occur. 



KKV TO INni.\NA TKIUKS OK siLruin.E. 



(/. Iliud cox;e simple. 



h. Fi-diit coxie more of less transverse at base and with trodiantin. 

 c. Front eoxal cavities open behind. 



(1. Hind eox;p conti.siunus ; larger. 10 or more mm. 



Tribe I. Silphint. \). 27:!. 

 <I(1. Hind eoxjie separated; eyes wanting; smaller, not over 2 mm. 



Tribe II. Pinodytini. p. 277. 

 cr. Front ooxal cavities closed behind; length less than 5 mm. 



Tribe IV. Anisotomini. p. 284. 

 hh. Front cox:e cylindric-conic, willmut trodiantin. the cavities closed 

 behind: lengtli less than »"> nnii. Tribe 111. (Uiolevini. p. 27S. 

 (((/. Hind coxa' wi(h lamina' or plates; size very small, not over 2 mm. 



Tribe V. Cr..\MBTNi. p. 2!U. 



Tribe I. SILPHINI. 



To this tribe beloii^^ all the larg:er uKMnbers of the family, tlie 

 distinctive characters being the open front eoxal cavities and the 

 contiguous hind coxa^. The form is sometimes elongate, but usually 

 oval or even nearly circular: elytra distinctly, sometimes wddely. 

 margined at the sides: abdomen often visible beyond the elytra. Of 

 the seven genera com]u-ising the li-il)e. three are represented in In- 

 diana. 



KFA- TO INDIANA GI';NERA OF SILPHINI. 



(I. Anlenu?e ten-jointed, the last Tonr Joints forming an alirnpt club; mid- 

 dle coxfe widely sejiarated. I- Nkckophorus. 

 {III. Antenme eleven-.toinO'd. cither slender or gi-adnally clavate. 



h. Middle coxa' moderately separated: front eoxal cavities widely open 

 behind: elytral stria\ if present, not punctured. II. Sii.piia. 



hb. Middle cox;i> narrowly separated or contiguous; front eoxal cavities 

 narrowly open ; elytral stripe with distinct impressed punctures. 



III. Necrophilus. 



T. XECROPnoRfs Fal). 177:". (Cr.. "a dead body bearing.") 

 To this genus l>e]ouy hirgc. eh)iigate. thick-bodied bedles. having 



