THE PSKIDO ('MC:; UECTLES. 775 



iinlly iiarrowini; to front, surl'.-icc spnrscly mid r.-illicr cdarscly iPiinclui'cd; 

 carina' of liind ani;k's extendinf; two-tliirds to apex. lOlyIra sli.^litly wider 

 than thorax, not striate, sparsely, tinely and irre-^nilarly pnnctate. Lent^tli 

 4 nnn. 



Soiilhcni li.iir (d' Stale; rre;|iieiil. May iT) -liiiie "Jti. Oceiirs 

 especially (Ui llowers ol' milkweeci. 



/>. <in(i(lninisl iihiiiis iJoiiv.. more robust, llioi'acic cai'iiia' shoi'tei'. 

 leiiiitli 4 imii.. I'atiii'es I'roni Wisconsin to bMorida and lias been re- 

 corded IVoin Cincinnali. />. hHkIiis M<'IsIi.. wholly |)iceous black, 

 leiiuHi 4 nnn.. is known I'l-om Peiuisylvania. 



TI. Tifiiosci's Lat. 17!Mi. ((h'., 'Mo leaj) npon.") 



In this tieniis the j-inleinnv vary in tin' two sexes. In the male 

 the clnb is one ami a half limes 1he length and three times as broad 

 as ail llie pi'eceding joints together; in the female it is very little 

 longei' than the six preceding joints and not more than twice as wide 

 as they, 'i'lie eyes of the n)^de are largei- and less separated in 

 front. Four s[)eeie.H have been tai\en in the State. 



KEY TO INDIANA SPECIES OF THROSCUS. 



(I. Eyes entire. 



1). StrijTi of presternum much shortened. 



c. Hind angles of thorax witliout trace of carina. 147G. punctati s. 

 cc. Hind angles with a distinct but short carina close to the side mar- 

 gin. 1477. iNvises. 

 hi). Stria^ of prosternum entire or nearly so; hind angles not carinate. 



1478. coNSTRicToa. 



(la. Eyes with a narrow oblicine impression very nearly dividing them into 



two equal portions; stri:e of prosternum entire; elytral intervals with 



two rows of punctures. 1479. ciiEVKOi.ATr. 



147G (4547). Tiiroscus punctatcs Bonv., Monog. Throscidse, 1859, 15. 



Oblong, convex. Dark brown, moderately shining, sparsely and very 

 finely pubescent. Thorax nearly twice as wide as long, sides strongly con- 

 verging from base to apex, disk distinctly depressed on basal third, coarsely, 

 equally and rather closely punctate. Elytra not wider than thorax, striate, 

 strife rather closely punc.tate; intervals flat, each with two rows of close- 

 set punctures which are almost as large as those of strife. Tvength ?,-Z.5 mm. 



Vigo County; rare. IMay 28, In a specimen at hand the elytra 

 are reddish-brown and the thorax ])ice()us. 



1477 (4.54)8). Tiiroscus invisus Horn, Trans. Amer. Entom. Soc, XII, 

 1885, 201. 

 Resembles punetatus but somewhat larger, darker and more rolnist. 

 with the basal region of thorax less inqiressed, the punctures of disk more 

 widely separated and a fine but distinct carina close to the margin on hind 

 angles. Length 3.5-4 mm. 



