NORTH AMERICAN COLEOPTERA. 1 7X> 



X. aiicliora Hentz. — Rufo-testaceous, sparsely pubescent, with ere<-t hairs in- 

 termixed; elytra with a transverse piceous band behind the middle extending 

 broadly forward along the suture, a lateral piceous spot at the margin ; head some- 

 what darker in color, densely and rather coarsely punctured, sparsely pubescent 

 with erect hairs, front slightly concave; thorax oval, not wider than long, very 

 abruptly widening from the base of the horn; surface sliglitly shining, rather 

 densely punctate, somewhat rugose, horn rather narrow and long in both sexes, 

 margined and serrate at the sides ; crest narrow, very feebly elevated, slightly mar- 

 gined, but distinctly serrate; elytra oblong, moderately shining, rather densely 

 [)uncliired, sparsely clothed with rather coarse pubescence with erect hairs inter- 

 mixed, apices variable in the sexes; body beneath finely not denselv punctured, 

 very sparsely pubescent. Length .14 inch : '.].o mm. 



There i.s no perceptible difference between the .sexes in tlie width of 

 the thoracic horn, and the la.st ventral segment is very feebly truncate in 

 the male. The apices of the elytra in the male are obliquely truncate, 

 the sutural angle rounded, the outer angle somewhat more distinct, the 

 female h;is the apices separately rounded. 



The usual elytral ornamentation con.sists of a transverse, more or less 

 crescentic band on each elytron at the apical third ; these join at the 

 suture and extend forward, becoming broader at the base ; near the side 

 margin behind the humeri is a vitta of varying size, and sometimes want- 

 ing. Speciiuens rarely occur with nearly the entire surface piceous, with 

 .some indistinct testaceous marks on the elytra. 



In its normal style of marking this species is easily known. 



This species is widely distributed, but has not been observed in Arizona 

 or the Pacific States. 



X. <lenii(latus n. sp.— Form slender, parallel, piceous; thorax rufous ; elytra 

 indistinctly mai-ked as in monodon ; surface shining, very sparsely' hairy ; head 

 piceous, sparsely;punctate, front flat ; thorax rufo-testaceous, shining, verj- sparsely 

 but distinctly punctate, very slightly hairy ; horn moderately long, narrow, mar- 

 gined at sides and apex, slightly serrate posteriorly ; crest scarcely elevated, mar- 

 gined distinctly at the sides, obsoletely in front, not serrate ; elytra oblong, parallel, 

 shining, coarsely, rather deeply but not closely punctured, sparsely clothed with 

 rather short pubescence with intermixed short erect hairs in series; body beneath 

 very sparsely punctulate. Length .12 — .14 inch ; 3 — 3.5 mm. 



ihe male has the elytra obliquely truncate and sub-spinous at tip, the 

 female conji>intly rounded and rather obtuse. The la.st ventral segment 

 of iiKile is more obtuse, and has a slight fovea near the apex. The 

 thoracic horn shorter, no difference in the two sexes, and is scarcely wider 

 than the crest. 



Tli^. elytral markings are as nearly as possible those of inonotlon, but 

 the elytra may become almost entirely piceous. 



Occurs in California. 



(44) 



