DESCRIPTIONS OP NEW SPECIES. 205 



stricted suddenly but slightly, far behind the eyes, which are finely 

 granulated, and feebly emargiuate on the inner side ; the hin< 

 angles of the head are obtuse and rounded ; the antennae are long 

 and slender, as in Encyclops, and the 4th joint is a little shorter 

 than the 3d and 5th, they are inserted well up on the front, which 

 is less vertical than in Encyclops, and the mouth is a little longer. 

 The last joint of the palpi is triangular and obliquely truncate. 

 The prothorax is narrower than the head, longer than wide, deeply 

 constricted before and behind, and the sides are obtusely but 

 strongly dilated. The elytra are wider than the thorax, elongate, 

 parallel, feebly truncate at tip. Legs slender, tarsi long, 1st joint 

 of all much longer than the 2d, of the hind tarsi the 1st and 2d 

 joints are -feebly sulcate, with a narrow line of pubescence each 

 side ; 3d joint of all the tarsi dilated and deeply bilobed, as in 

 Encyclops. 



The species is black, densely punctured, the head and protho- 

 rax more finely than the elytra. Varieties occur with yellow 

 elytra, with the suture and broad sublateral vitta black ; A. 

 Fraukenhaeuseri Mann,, is a variety in which the elytra have 

 only the black vitta, and the legs are testaceous ; Leptura fusci- 

 collis Lee. is a larger variety from California, of still paler color, 

 the body being testaceous, and the elytral vitta very indistinct. 



CEXTRODERA LEG. 



530. C. nevadica. Fusco-testacea, helvo-pubescens, prothorace con- 

 fertim subtiliter punctate, latitudine vix longiore, convexo, leviter can- 

 aliculato, antice posticeque constricto, tuberculis lateralibus obtusis ; 

 elytris thorace sesqui latioribus apice rotundatis, subtilius versus basin 

 autem distinct! ns punctatis ; antennis ( 9 ) corporis f baud longioribus, 

 articulo 4to 3io breviore, conjunctis 5to sequalibus. Long. 17 mm. 



One female ; Virginia City, Nevada, Mr. Edwards. By the 

 obtuse tubercles of the prothorax this species resembles C. sub- 

 lineata, but the punctuation is finer, the prothorax is scarcely 

 narrower at tip than at base, and there is no appearance of lines 

 on the elytra. The antennae are shorter and stouter, but this is 

 in part or in whole a sexual character, the 9 of C. sublineata 

 being unknown to me. 



XYLOSTEUS FKIWALDSKY. 



531. X. ornatus. Niger, capite thoraceque dense punctatis, elytris 

 fortiter punctatis, maculis utrinque duabus flavis marginalibus ornatis, 

 versus apicem sublsevibus. Long. 14 mm. 



