110 (iEO. IT. HORN, M. D. 



Not Idoiflticd. 



S. icteratus Muls., loc. cit. p. DUt). 



S. cyanescens Muls.. lot-, oil. p. !)!)I5. 



S. atramentarius I?oIi., Buj;. Hosii Ins. j). 207. 



S. californicus Boh., lor. til. 



S. infuscatus IJoli.. Uk-. cit. i>. 'JOH. 



EKKATIM — Vwiiv 85, line 13, for en ttii mix leiul opaadiix. 



SCYilIMIL.L,rS n. g. 



This genus is proposed for a species of tlie form and habitus of 

 Scyinnu,^ punctuni, with all the essential characters of Sci/miiUf, but 

 ditU'ring in the following })articulars : 



Body not pubescent, except feebly on the head and thorax. Eyes 

 feebly eniarginate and inii^ressed, the lenses obliterated opposite the 

 base of the antennie. Antennte very short, formed as in Srt/miitin; 

 prosternum flat, elevated lines not distinct ; mesocoxal line joining 

 the met-episternal sutun- at middle. Abdomen composed of five 

 se"'ments. the first lonoer at middle than the next three, the suture 

 between the first and .second well marked ; metacoxal line oblique, 

 extended toward the edge of the .segment, whiih it joins near the 

 posterior angle. 



The impression of the eyes recalls a similar character observed in 

 Thntscns, in which, however, the impression is better marked. My 

 attention was first especially directed to this insect by the fact that 

 there are but five ventral .-iegments, while in the grouj) (B) of iScijni- 

 ;/».v, with which it might be as,^ociated, there are six segments. The 

 metacoxal line is also more oblique than in that group, and reaches 

 the side of the segment without running parallel with the first suture. 



S. atorriimi!* n. sp. — Broadly oval and convex, margin slightly internipted, 

 black, shining, elytra usually without traee of puheseence. Head coarsely sjjai-sely 

 punctate. Thorax slightly narrowed in front, sides feebly arcuate, surface coarsely 

 not closely punctate, basal marginal line indistinct ; prosternum flat, coai-sely 

 punctured, without elevated lines; metasternum coareely .si»ai-sely punctured and 

 alutaceous. the mesocoxal line joining the suture near its middle. Abdomen 

 sparsely punctate, metacoxal line feebly »'urved, not touching the fii-st suture nor 

 parallel with it. Length .04— .0(» inch.; 1— 1.."> mm. 



The abdomen has but five segments; the pubescence of the head 

 and thorax is sparse, but di.stinct ; but in neither of the four si)eci- 

 mens seen has there been any trace of i)ubescence observed on the 

 elytra. 



Hah. — Northern California and Oregon (Koebele, 40). 



