NORTH AMERICAN COLEOPTERA. 105 



S. inaciilicollis Lee. (Luperus), Trnns. Am. Eiit. Soc. xii, p. 27.— Olilou?, 

 parallel, beneath aud legs piceous; above, head black ; thorax either yellow with 

 piceous spots or entirely black, elytra bluish or greenish. Antennse two-thirds 

 the length of the body, piceous; the three basal joints pale beneath. Head 

 smooth, black. Thorax broader than long, sides slightly arcuate in front, then 

 divergent to base ; disc slightly convex, polished in the black specimens, or with 

 a very few punctures in the maculate; scutellura black. Elytra moderately 

 closely punctate, not alutaceous, in some specimens vaguely subsulcate. Length 

 .24— .28 inch. ; 6— 7 mm. 



Male. — Last ventral semicircularly emarginate at middle, truncate each side. 



Female — Last ventral broadly oval at tip. 



Two varieties occur in this species between which all necessary 

 intermediate forms are in my cabinet. 



In the typical form the thorax is yellow, with an oblong-oval, 

 piceous spot, broader in front, on the median line, and a smaller 

 piceous spot on each side near margin. In the other form the thorax 

 is polished black. 



Occurs at San Diego, Cal. 



S. grapfo«leroi«les Crotch (Luperus), Trans. Am. Ent. Soc. 1874. p.' 80. — 

 Form of JlavicoUis ; head and thorax greenish blue, elytra cobalt-blue, body be- 

 neath and legs piceous, with distinct bluish tinge. Antennae two-thirds the 

 length of the body, piceous; the three basal joints paler beneath. Head smooth. 

 Thorax slightly wider than long, a little narrower at apex, sides feebly arcuate 

 in front, then parallel to base, disc moderately conve.x, sparsely finely punctate ; 

 scutellum blue-black. Elytra sparsely, but very distinctly punctate, surface 

 alutaceous. Body beneath aud legs piceous, with bluish lustre. Length .26 — 

 .28 inch.; 6.5— 7 mm. 



Male. — The ventral characters are as in flavicollis ; the first joint of front tarsus 

 slightly dilated and thickened. 



Female. — As in flavicollis. 



Occurs at Santa Barbara, San Buenaventina and Los Angeles 

 (Cal.). 



S. Schwarzii n. sp. — Form oblong, parallel, beneath piceous, above uni- 

 formly blue, greenish or bronze. Antennfe piceous, the basal four joints in 

 great part testaceous. Head alutaceous, sparsely punctate near the eyes. Thorax 

 a little wider than long, slightly narrower in front, sides anteriorly feebly ar- 

 cuate, then feebly sinuous to base, disc shining, sparsely punctate, more evidently 

 near the base. Elytra distinctly not closely punctate, smoother at apex, sutural 

 region slightly depressed near the base, the suture itself slightly elevated. Body 

 beneath piceous, with slight metallic lustre. Legs piceous, the anterior knees 

 and the fiout tibife in great part yellow. Length .18 — .20 inch. ; 4.5 — 5 mm. 



Male. — Last ventral piceous, shining, the disc transversely flattened, the apex 

 feebly emarginate; posterior tibise stout and rather strongly curved. 



Female. — Last ventral acutely oval at tip ; hind tibiae slightly arcuate. 



This species is closely related to loripes, but differs in the color of 



TEANS. AM. ENT. SOC. XX. (14) JUNK. 1893. 



