526 Coleopterological Notices, V. 



Prothorax fully three-fifths wider than loii":, very obsoletely punc- 

 tulate. Scutellum distinct, equilateral. Elytra about three-fourths 

 longer than the prothorax, widest near basal third, the sides very 

 broadly, evenly arcuate ; surface strongly, remotely punctate, the 

 basal stria becoming obsolete near lateral third ; apical angles 

 rather broadly rounded. Mes-epimera extending a little more than 

 half way to the coxae. Legs slender, the hind tarsi long, very slen- 

 der, as long as the tibiae, with the basal joint longer than the next 

 two. Length 2.25-2.7 mm.; width 1.4-1.6 mm. 



Entire Atlantic slope and westward to the Mississippi. The 

 most abundant of the eastern species and distinguished by its 

 large size, antennal structure and punctuation. The post-coxal 

 plate of the first ventral is very short and broadly rounded behind. 



S. castanea Mots. — Bull. Mosc, 1845, IV, p. 361; Lee: Proc. Ac. 

 Phila., 1S60, p. 323. 



This species resembles convexa very closely, but is on the whole 

 a little larger, with the prothorax somewhat shorter and the elytra 

 just visibly longer; the antennae are a little thicker, the third joint 

 but slightly longer than wide, and, as usual, strongly narrowed 

 toward base, the fourth not more than three times as long as wide, 

 shorter than the fifth, sixth much longer, not as long as the seventh 

 and a little shorter than the fourth and fifth together. The elytra 

 are, as a rule, somewhat more strongly and perhaps a little less re- 

 motely punctate. Length 2.25-3.0 mm. ; width 1.4-L7 mm. 



The series before me consists of a very large number of specimens 

 from many parts of California, British Columbia, Idaho, Utah, and 

 one labeled "Arizona." The normal color seems to be black, but 

 specimens occasionally occur which are castaneous, undoubtedly 

 from immaturity. 



S. punctulata Lee— Proc. Ac. Nat. Sci., Phila., 1860, p. 323. 



Broadly oval, highly polished, black, the elytral apex not in the 

 least paler; head, antennae, legs and most of the abdomen above 

 and beneath rufous ; fine hairs unusually distinct on the under sur- 

 face. Antennae long and slender, fully as long as the head and pro- 

 thorax, the third joint triangular, scarcely longer than wide ; fourth 

 three times as long as wide; fifth much longer, fully five times as 

 long as wide, much longer than the third and fourth combined, 

 shorter .than the sixth, which is unusually long-, even longer but 



