34 ColeopteroJogical Notices, III. 



berarit and anteriorly vertical mesosternum and generally longer, 

 more finely attenuate scutellura. The true Ischnocnemis has the 

 mesosternum non-protuberant. 



Our three species may be separated b}^ the following table : — 



Elytra with raised ivory vittfe bivittatllS Dup. 



Elytra simple, without raised lines or pubescent discal vittaj, the suture alone 



narrowly and very evenly vittate, the vitta composed of extremely dense 



white pubescence. 



Piceous-black, the prothorax and femora rufous ; elytral punctuation coarse, 



very sparse, evenly distributed, the pronotal punctures and pubescence 



not denser laterally sutui'a.lis Leo. 



Pale rufous throughout, the tibise and tarsi nigrescent ; autennse black, in 

 the male fully twice as long as the body, in the female about as long as 

 the body. Prothorax more transverse and less strongly narrowed ante- 

 riorly than in suturalis, the pubescence very dense toward the sides and 

 apex as well as along the base. Elytra nearly as in suturalis, but more 

 rajiidly harrowed from base to apex, the punctuation coarse, sparse toward 

 the sutural vitta, but thence dense, rugulose and intermingled with 

 smaller punctures in a wide uneven longitudinal area extending almost 

 to the sides, the pubescence longer and denser than in suturalis. Length 

 11.0-12.5 mm. ; width 3.5-3.8 mm rubeilS n. sp. 



The male antennae are always much shorter in suturalis than in 

 ruhens, and are generally not more than two-thirds longer than the 

 body, the eyes also are more narrowly separated dorsally than in 

 rubens. The three species agree in the form of the elytral apices 

 which are strongly, very acutely dentiform but scarcely spinose 

 externally. Ruhens was obtained in great abundance by Mr. Dunn 

 in various parts of southern Arizona and California, and suturalis 

 by Mr. Wickham at Tuc;son. 



STENOSPHEIVUS Hald. 



With the exception of notatus our species seem to be quite local 

 in distribution ; the following belongs near lepidus Horn : — 



S. loilgicollis n. sp. — Slender, elongate, subparallel, polished, the 

 elytra slightly less so than the prothorax and minutely evenly reticulate ; 

 body piceous-black, the femora red, piscescent near the apex ; prothorax red, 

 clouded with piceous toward the sides ; pro- and mesosterna red ; pubescence 

 coarse, moderate in length, sparse. Head finely, longitudinally canaliculate ; 

 antennae (male) very slender, fully three- fourths longer than the body, joints 

 three to five spinose internally at apex. Prothorax distinctly longer than 

 wide ; sides broadly, evenly arcuate, gradually convergent anteriorly and 



