SUBFAMILY II. RH YXCH1TIX.K. ." 



52 (8209). Ei-cxAMPTUs SULCIFROXS Gyll., Schonh., 1839, 343. 



Elongate, slender. Head, thorax, legs and in part the under surface 

 reddish-yellow, elytra bluish-black, antennae piceous. Beak a little shorter 

 than head, the latter narrowed behind the eyes, sparsely punctate. Thorax 

 subcylindrical, slightly longer than wide; disc rather coarsely and sparsely 

 punctured. Elytra one-half wider at base than thorax, the punctures of 

 striag large; intervals narrow, feebly convex. Length 3.5 4.5 mm. 



Marshall Co., Ind., rare; June 11 12. I'eaten from oak. He- 

 scrib'^d from Carolina, and known from Alexandria, Ya., south 

 and southwest to Texas and Kansas. The Indiana specimens 

 were determined by Pierce. He has recorded (1013, 30!) ) the 

 species as "distinctly southern and differing structurally only by 

 the frontal sulciis," yet in his key to species he states that nu- 

 gustutnx haw the front silicate and that both species have the 

 thorax medially depressed. This does not agree with Gyllenhars 

 original description of xulcifronx, wherein he states: "Eiirf- 

 Hdnipto (in<inxt<ito valde similis, sed frons snlcata, thorax mm 

 canaliculatus." 



III. KIIYXCHITES Schneider, 1791. (Gr., "snout.") 

 The members of this genus are more convex and robust and 

 are easily distinguished by the exposed pygidium. About 10 

 species are known from the United States, seven of which occur 

 in our territory, 



KEY TO EASTERN SPECIES OF RHYXCIIITES.* 



a. Surface distinctly pubescent; length 3.5 or more mm. 



?>. Pubescence short, inconspicuous; body red above. 53. BICOLOR. 



bl>. Pubescence long, erect, conspicuous. 



c. Strial punctures distant, not very distinct; color blackish-bronzed, 

 elytra often paler. 54. .EXEIS. 



cc. Strial punctures large, deep; color blue-black. 55. IIIIMTS. 



aa. Surface glabrous or almost so; length less than 3 mm. 



(/. Head strongly punctured; blue-bronzed; form more elongate; length 



2.5 2.8 mm. 56. CYAXKI.I.IS. 



dd. Head feebly punctured; form more robust; length less than 2.3 mm. 



e Color above strongly coppery; beak in both sexes as long as thorax; 



sub-basal elytral depression very distinct. 57. .ERATUS. 



ee. Color above black or bluish-black, at most feebly brassy; elytral 



depression feeble. 



f. Beak of male shorter than thorax; of female one-fourth longer, 

 very slightly widened and flattened near apex. 



58. PERPLEX is. 



ff. Beak of both sexes as long as head and thorax, distinctly wid- 

 ened and flattened near tip. r>9. 1:1.1 si s. 



*R. fossifi'inis Lee., cited in Smith's List of N. J. Ins.. is omitted. This name was 

 assigned to a single specimen from Mariposa, C'al., which "may have been an extreme 

 variation" (Pierce, 1909, 330); and there is no possibility of its beim; properly applied 

 to a New Jersey insect. 



