NORTH AMERICAN COLEOPTERA. 179 



In the males the antennae are nearly twice as long as the body. The 

 prosternum in front of the coxge, except a smooth band at apex, is 

 coarsely punctured and opaque, and the space so sculptured is depressed. 



This is the species which appears in our lists as crtbripenms Thorns. 

 It is, however, smaller, thorax less elongate and the surface less coarsely 

 punctured. 



Resembles the species which I have identified as rufipes Bates, from 

 Mexico, but the latter has the thorax move and the elytra less coarsely 

 punctured, and the male has a well limited, oval, coarsely cribrate space 

 on the prosternum in front of each coxa. 



Occurs at Cape San Lucas, Lower California. 



' S. lepitliis n. sp.— Entire body beneath black, thorax and femora bright red. 

 Head coarsely, closely punctate. Thorax oblong oval, longer than wide, sides 

 feebly arcuate, surface shining with a few punctures of unequal size irregularly 

 disposed near the sides. Elytra moderately coarsely punctured, the punctures a 

 little deeper and closer near the apex, each bearing a. short yellowish hair; apices 

 sinuously truncate, the angles dentiform. Body beneath at sides sparsely punc- 

 tate, abdomen almost smooth. Femora bright red, piceous at knees, tibise and 

 tarsi black. Length .?>8 inch; 9.5 mm. 



The two specimens before me are males, one having the under side of 

 thorax red, tlie other black. In both the antennae are nearly one and a 

 half times the length of the body. The prosternum beneath is coarsely, 

 cribrately punctured except a very polished space along the apical border 

 and a nearly smooth line at middle. 



Two specimens, Arizona. 



S. «lol<»SHS n. sp. — Black, prothorax and often the meso-metasternum red. 

 Head coarsely, densely punctured. Thorax oval, a little longer than wide, sides 

 moderately arcuate, disc shining with a very few indistinct punctures. Elytra 

 moderately, sparsely punctured, each puncture with a short yellowish hair ; apices 

 obliquely truncate, the angles slightly spiniform. Body beneath sparsely, abdomen 

 very sparsely punctate. Legs black. Length .27-.42 inch ; 7-10.5 mm. 



In the male the antennae are one and a third times the length of the 

 body ; the prosternum is densely cribrately punctured except a space 

 along the apical border and from that along the middle to the tip of the 

 prosternal process. The female antennae are nearly as long as the body, 

 the prosternum rather sparsely punctured over its entire surface. 



Occurs in southwestern Texas. 



S. debilis n. sp. — Entire body and members pale brownish testaceous, very 

 sparsely pubescent. Head coarsely and deeply punctured. Thorax oval, longer 

 than wide, narrower in front, sides feebly arcuate, surface very coarsely but not 

 closely punctate, except a small space at middle. Elytra moderately closely not 

 coarsely punctate, apices truncate, slightly obliquely, the angles sub-spinous. 

 Body beneath very sparsely punctate. Length .30-.36 inch ; V.5-9 mm. 



