LeOonte.] 



HYLURGINI. 373 



impressed and densely fringed with longhair behind. Length 3.8 mm. ; 

 .15 inch. 



6. S. jpraeceps^n. sp. 



Cylindrical, black, shining, head thinly clothed with long erect hair, pro- 

 thorax scarcely longer than wide, sides rounded in front and feebly con- 

 stricted; surface deeply but finely and distantly punctured. Elytra with 

 numerous rows of rather distant punctures, and showing some traces of 

 very fine striie; ventral surface strongly punctured in front, densely and 

 finely behind; declivity large, perpendicular, acutely marginate; second 

 ventral segment faintly carinate near the tip; fifth ventral concave, strongly 

 margined, as long as the third and fourth united. Length 3 mm. ; .12 inch. 



California, Calaveras; Mr. Crotch. The head of the $ is more flattened, 

 more distinctly aciculate and less punctate than in the 9 an( i k a ^ so n-""' 

 hairy. Otherwise I observe no sexual differences. 



7. S. subscaber. n. sp. 



Cylindrical, black, shining, head thinly clothed with erect hairs, finely 

 aciculate behind, punctulate in front. Prothorax a little longer than wide, 

 sides feebly narrowed, and slightly constricted in front; apical inurgin and 

 sides distinctly punctured, disc behind obsoletely punctulate. Elytra with 

 the suture more deeply concave towards the base than usual; marked with 

 faint traces of striae, and rows of punctures which are very small behind, 

 but become larger and elevated into granules near the base; the apical 

 margin is concave, and densely, rugoselv punctured as usual, and very 

 feebly serrate. Ventral declivity flat, oblique, scarcely concave, feebly 

 punctured, anterior margin fine, not prominent; fifth segment longer than 

 the third and fourth united, slightly concave; posterior margin acutely 

 prominent. Length 4.2 mm. ; .17 inch. 



Vancouver Island, Oregon and California; three specimens without sexual 

 differences. 



8. S. sulcatus Lee., Tr. Am. Ent. Soc. 1868, 167. 



One specimen, New York. The rows of punctures are alternately very 

 slightly larger, so that in certain lights there are feeble indications of strhi?, 

 but they are not coarser near the base. Length 3.7 mm. ; .15 inch. 



9. S. ventralis Lee., ibid. 1868, 167. 



Washington Territory, George Gibbs. Similar in sculpture to S. mUatu, 

 but the ventral declivity is larger, the second segment is armed 

 with an acute compressed tubercle, and the third and fourth seirme 

 more flattened, and less sparsely punctured ; the fifth segment is as l.ng 

 as the two preceding united, concave, with reflexed posterior margin. 

 Length 4 mm. ; .16 inch. 



Tribe III, HYMRttlXl. 



In this tribe the head is exposed, not covered by a prolongation of the 

 prothorax ; the latter is truncate in front or but slightly rounded, and not 

 differently sculptured^ The an!enn:e vary in form according to the group, 



