1673.] 41 [Horn. 



verse. The elytral spots have a tendency to become confluent, and speci- 

 mens occur with the entire surface black, margined at the sides with 

 red. Rostrum black, longer than half the thorax, sparsely punctured, 

 and finely grooved at 'case. Thorax longer than wide, apex constricted, 

 sides in front strongly arcuate, behind sub-parallel, surface sparsely 

 punctured. Scutellum feebly grooved. Elytra finely striate, striae finely 

 and distantly punctured, intervals flat, impuuctured. Pygidium perforato- 

 punctate at apex, more finely and densely punctured at base. Body 

 beneath sparsely punctured. Length .28-. 40 inch ; 7-10 mm. 



In well preserved specimens the upper surface is slightly pruinose. 



Occurs over our entire country, from the Atlantic to the Pacific, and 

 southward through Mexico. 



S. pustulosus Gryll. Schoah. Cure. TV., p. 923. 



Body beneath black with luteous, sub-sericeous efflorescence. Rostrum 

 three-fourths the length of thorax, sparsely punctulate at base, slightly 

 canaliculate, punctured, each puncture surrounded with luteous efflores- 

 cence. Thorax longer than wide, anteriorly slightly constricted, sides 

 feebly arcuate, gradually divergent to base ; surface brownish, at sides 

 darker, opaque, surface sparsely punctured, each puncture with luteous 

 area. Elytra slightly narrower to apex, surface brownish, opaque finely 

 striate, stria? distantly punctured, intervals flat, distautly uni-seriately 

 punctulate, punctures of striae and intervals with luteous area. Scutel- 

 lum luteous. Pygidium very coarsely perforato-punctate at sides and 

 apex. Body beneath sparsely punctate. Length .40-. 44 inch; 10-11 mm. 



The punctures of the surface being surrounded by a round luteous 

 area, gives the aspect of a very coarse punctuation. 



Occurs in Arizona. 



S. validus Lee. Proc. Acad. 1858, p. 80; procerus, Lee. loc. cit. 



Black, sub-opaque, or with a slight velutinous aspect. Rostrum nearly 

 as long as thorax, strongly arcuate at tip, finely punctured, a puncture at 

 base between the eyes. Thorax sub-depressed, apex feebly constricted, 

 sides moderately arcuate, gradually diverging and at basal fourth, sub- 

 parallel ; surface very sparsely and finely punctulate. Elytra rapidly 

 broader behind the base, then gradually narrowed to tip, basal margin 

 slightly reflexed, surface finely striate, strias distantly and obsoletely 

 punctulate, intervals fiat, very minutely punctulate. Pygidium coarsely 

 perforato-punctate and slightly more convex along the median line. 

 Body beneath black, sub-opaque, sparsely punctured, abdomen more 

 coarsely punctured. Length c 60-.90 inch ; 15-23 mm. 



Male. — Anterior tibia? densely fimbriate within with long-yellowish 

 hairs, middle tibia? fimbriate with shorter hairs, hind tibia? with very 

 short black hairs. 



Female. — Tibia? within fimbriate, with short hairs. 



This species is the largest Sphenophoride in our fauna. I find speci- 

 mens from Mexico labelled fuliginosus Chev., but no such species is 



