196 GEO. H. HORN, M. D. 



Occurs everywhere in our country from Maine to California, and 

 common. 



S. violaceilS Grav., Micr. p. 1.32; Erichs. Staph, p. 392; cupripennis Mels. 

 Proc. Acad, ii, p. 35. — Forin rather slender, body beneath black, shining, 

 head, thorax and elytra violaceous or cupreous. Head subtriangular, coarsely 

 and sparsely punctured and shining. Eyes obliquely oval. Antennse piceous, 

 a little longer than the head. Thorax as wide as the head, as wide as long, 

 Bides feebly base more broadly arcuate, surface shining, coarsely and sparsely 

 punctured with distinct smooth median line. Scutellura velvety. Elytra a 

 little wider than the thorax, as wide conjointly as long, densely punetulate 

 and subopaque, sparsely pubescent. Abdomen above black, shining, iridescent, 

 segments 2 — 3 densely finely punetulate and with greyish sericeous pubescence, 

 segments 4 — 7 coarsely sparsely punctate and with very little pubescence. 

 Body beneath sparsely punctate, sides of metasternum more densely. Abdomen 

 beneath very sparsely and moderately coarsely punctate and with sparse pubes- 

 cence, segments 4 — 6 more finely and densely punctured along the anterior 

 border and with the grey pubescence more evident. Legs piceous black, irides- 

 cent, femora sparsely punctate. Length .56 — .60 inch; 14 — 15 mm. 



The color above varies from violaceous to cupreous. In some 

 specimens the thorax appears to have a slight siuuation immedi- 

 ately behind the anterior angles. This is the only species in our 

 fauna with the basal segments of the abdomen differently clothed 

 from the apical. 



Occurs from Canada to North Carolina. 



S. rutilicauda n. sp. — Form moderately elongate, piceous, head, thorax 

 and elytra blue, last two segments of abdomen red. Head subtriangular. 

 coarsely, not densely punctured, a feeble median smooth line. Eyes normal, 

 obliquely oval, subtruncate in front. Antennae piceous, a little longer than 

 the head. Thorax as wide as the head, as broad as long, sides very feebly, 

 base broadly arcuate, punctured similarly to the head. Scutellum densely 

 punetulate with velvety pubescence. Elytra a little wider than the thorax, 

 conjointly as wide as long, densely punetulate, very sparsely pubescent. 

 Abdomen sparsely finely punetulate with dark pubescence, last two segments 

 red with reddish pubescence. Body beneath sparsely punetulate, abdomen 

 coarsely sparsely punctured and with short brownish hairs, reddish on the last 

 two red segments. Legs piceous, femora sparsely punctured. Length .52^.60 

 inch ; 13 — 15 mm. 



This species bears a certain superficial resemblance to scq^hi/rinus 

 in the distribution of color but is similar in form to fossator or 

 tomentosus. The head and thorax are entirely void of the usual 

 pubescence, as is the case in all those species in which the punctures 

 are distantly placed. 



Two $ specimens from Oregon. 



S. viridaiius n. sp. (Fauvel mss.)— Form moderately elongate, piceous, 

 head, thorax and elytra variable in color, either seneous, bluish, greenish or 

 violaceous, epipleural margin usually pale. Head subtriangular. coarsely and 

 rather densely punctured, moderately shining, very inconspicuously pubes- 



