COLEOPTERA. 03 



New York, 1 ; Cape May, New Jersey, 1. 



The type is in rather poor condition and lacks the posterior tarsi, 

 with exception of the first joint ; this I have compared with the organ 

 which, in my opinion, would best serve as a standard. 



This specimen was received with Mr. Fauvel's label, as cinerascens 

 Er., and, associated with it were numerous other specimens, which 

 proved to be stygicus Say. After carefully studying Erichson's rather 

 short description of cineraseens, I am forced to the conclusion that 

 the two species are distinct, more especially from the following state- 

 ments which are quoted in the words of that author : — 



"Antennae breviusculae, articulo tertio quarto vix longiore, nigrae. 

 Palpi nigri. Elytra thorace paulo longiora, dorso antico medio levis- 

 sime toroso, densius profunde punctata, interstitiis planis." 



The sinuation of the sides of the prothorax in front of the middle 

 is a character very seldom seen in the genus. 



Qbstrusus somewhat resembles stygicus Say. 



72. S. arizonae n. sp. (Crotch MS.). — Form moderately robust. Pubes- 

 cence rather long, fine, somewhat close, sab-recumbent, very pah; flavo- 

 cinereous. Head robust, rather small, not twice as wide as long ; interocular 

 surface slightly more than twice as wide as the eye, nearly flat ; equally 

 trilobed by the longitudinal sulcations, which are rounded and distinct ; 

 surfaces evenly, moderately, and equally convex ; punctures somewhat 

 coarse, close, rather evenly distributed, interspaces narrow, nearly fiat, 

 highly polished ; ocular lines meeting at nearly two lengths in advance ; 

 antennae slightly longer than the width of head, slender, piceous-brown, 

 club distinct; third and fourth joints sub equal, fifth slightly shorter, sixth 

 slightly shorter than the fifth and distinctly longer than the seventh, joints 

 three, four, and five rather abruptly enlarged at the distal extremities, joints 

 of club of nearly equal size; outer joints densely and coarsely pubescent; 

 maxillary palpi very robust throughout, dark piceous-brown, basal joint 

 piceo-testaceons. Prothorax evenly, gradually, and arcuately increasing in 

 width to a point slightly before the middle, where it is five-sixths as wide 

 as the head and distinctly narrower than long ; sides thence very gradually 

 convergent posteriorly and strongly sinuate ; anterior margin very slightly 

 shorter and much more arcuate than the posterior ; surface very feebly 

 tuberculate near the basal angles, transversely and feebly impressed just 

 behind the apex ; finely, closely, rather irregularly, and confusedly punc- 

 tate ; interspaces very narrow, polished. Elytra at base distinctly wider 

 than the head; sides rather feebly divergent posteriorly, distinctly longer 

 than the width at base, feebly arcuate, more strongly so toward I lie apices ; 

 together broadly, roundly, and feebly emarginate behind ; suture more than 

 one-third longer than the pronotum ; surface very feebly, rather coarsely, 

 very closely, and extremely irregularly punctured and channeled : inter- 

 spaces narrow, very convex, highly polished. Abdominal segments decreas- 

 ing uniformly and almost imperceptibly in width, first much narrower than 



