NORTH AMERICAN COLP^OPTERA. 93 



the present species approac^hes the form seen in the ((mericaini-^ group. 

 The alxlonien has six distinct segments. 



Hah. — .Siskiyou County, Cal. (Koebele, oiJ). 



S. flavifroiis Mcls. — Oval, blark, an oval yellow spot on eacli elytron one- 

 third from apex equally distant from side and suture, head often, tibite and tarsi 

 always yellow. Head sparsely punctate. Thorax narrower in front, sides mod- 

 erately arcuate, surface sparsely punctate, a line basal marginal line. Elytra 

 more coarsely, but less (ilosely punctate than the thorax. Body beneath black ; 

 metasternum nearly smooth at middle, closely punctate at the sides ; mesocoxal 

 line joins the e])isternal suture one-third from the front. Abdomen moderately 

 coarsely and closely punctate; metacoxal line parallel with the tirst ventral 

 suture. Length .06 — .08 inch.; 1.5—2 mm. PI. I, fig. 7. 



Two fairly well marked varieties occur in this species : 



S. ffaiifroii.i Mels. with a yellow head ; subvarieties occur with the 

 thorax entirely black, or with the side margin yellow, sometimes 

 extending along the apex. Specimens occur with only the front 

 angles yellow. 



aS. hioci(latn.-'< Muls.— This has a black head and thorax. jVIuLsant 

 indicates three varieties of this. One is the typical form with the 

 spot of moderate size, the second has a very small spot (guUiger) the 

 third has the spot much extended, and in addition has an apical pale 

 border {marginellus). This latter is to me doubtfully from oui' 

 fauna, and seems to be a distinct species. 



All the specimens examined seem to be females. The abdomen is 

 very plainly composed of six .segments, and the suture between the 

 first and .second well marked in its entire extent. 



Hab. — Canada, Pennsylvania, New Jersey, Ohio, Illinois, Georgia. 



S. SOr<li<lus n. sp. — Oval, outline regular, about a fourth longer than wide, 

 normal color piceous, each elytron with a large paler spot, which leaves only a 

 narrow border at sides, base and suture darker, sometimes entirely ferruginous. 

 Head and thorax scarcely punctate, the latter narrower in front, with feebly ar- 

 cuate sides, the basal marginal line indistinct. Elytra moderately closely punc- 

 tate ; prosternum convex, coarsely punctate, not margined at the sides; meta- 

 sternum coarsely punctured at the sides, the mesocoxal line arcuate, joining the 

 suture near the middle. Abdomen moderately closely punctate, the metacoxal 

 line not joining the first suture. Legs yellow. Length .06 — .08 inch. ; 1.5 — 2 mm. 

 PI. I, fig. 16. 



In color this species varies from ferruginous to piceous, in the latter 

 case the large pale space on the elytra is defined, but not sharj)ly. 

 The abdomen has six segments. 



Hah. — Califoi'iiia, Los Angeles and Owens Valley. 



TRANS. AM. ENT. SOC. XXII. .'VPRII,, 1895. 



