170 



[LeConte. 



2. Elytra ovate, rounded on the sides 3. 



" oblong, parallel " " 4. 



3. Prothorax transverse, scales yellow 1. corpulentus. 



scarcely wider than long, scales gray 2. ovipennis. 



4. Beak straight, scales gray 5. 



" curved 6. 



5. Elytra suddenly wider than prothorax 3. griseus. 



" gradually, slightly wider than prothorax 4. obtectus. 



6. Of usual size, scales yellow, elytra rather broad. . 5. flavicans. 



Very small, scales grayish, elytra narrow 6. pusio. 



Of usual size, mottled with spots of gray scales .. 7. tychioides. 



7. Interspaces of elytra not setose 9. 



" with single rows of hairs. . 8. 



8. Of usual size and form 8. vestitus. 



Smaller and more elongate 9. seriatus. 



9. Scales mottled in color 1O. 



" small, uniform bright fulvous 1O. fulvus. 



" large, dirty gray 11. sordidus. 



10. Elytra longer and less convex 12. cinereus. 



" more convex, scales large, oval 13. squamulatus. 



" " " " narrow 14. corniculatus. 



1. S. corpulentus, n. sp. 



Robust, black, densely clothed with oval ochreous scales ; beak densely 

 punctured, slightly curved, as long as the head and prothorax, thinly 

 pubescent. Prothorax nearly twice as wide as long, convex, sides strongly 

 rounded, densely punctured, punctures obscured by the scales, disc darker 

 than the sides. Elytra convex, sub -ovate, one fourth wider than the pro- 

 thorax, humeri prominent, rounded, striae well impressed, fine, interspaces 

 flat ; disc with a common dark spot extending from the base nearly to the 

 middle, wider behind, and reaching the third stria. Antennae with the 

 funicle rather stout, second joint not longer than the third ; hind tibiae 

 scarcely mucronate. Length 2.7 mm ; .11 inch. 



One specimen, Louisiana. Resembles in form PachytycMus discoideus, 

 but easily distinguished by the generic characters, and the different color 

 of the scales. 



2. S. ovipennis, n. sp. 



Robust, piceous black, thinly clothed with large gray scales ; beak punc- 

 tured, thinly pubescent, slightly curved, as long as the head and prothorax, 

 Prothorax scarcely wider than long, rounded on the sides, narrower in 

 front, convex, densely punctured. Elytra ovate, nearly one-half wilder 

 than the prothorax, humeri rounded, striae deep, sparsely punctured, in- 

 terspaces flat. Antennae with the funicle rather stout, second joint not 

 longer than third; hind tibiae scarcely mucronate. Length 2.5 mm. ; .10 

 inch. 



Michigan, Kansas, Texas. The color of the scales is sometimes uniform, 



