SYNOPSIS OF NOETH AMERICAN SYRPHID^. 97 



female shining black on the vertex, eontinned as a broad stripe (broadest 

 below) to the anteuuse ; on the sides the yellow of the face continues up 

 along- the eyes nearly to the ocelli. Antennae reddish-brown, blackish 

 on the upper part of the third joint. Thorax deep shining green, on the 

 sides with a yellow stripe, reaching from the humeri to the suture, where 

 it is sharply truncate ; post-alar callosity also yellow. Scutellum wholly 

 light yellow, faintly reddish on the disk; pile black. Abdomen black, 

 or brown; first segment, except a slender transverse spot on each side 

 behind, yellow; second segment with a slender yellow anterior fascia, 

 and a broader one in the middle, about a third of the width of the seg- 

 ment, straight and but shghtly widened at the sides; third segment 

 with a broad arcuate band, not quite touching the posterior angles on 

 the sides ; fourth segment with two slender parallel strii)es, leaving a 

 slender black stripe between them, on each side a broader, oblique, oval 

 spot, touching, or narrowly separated from the anterior end of the yel- 

 low longitudinal stripe, and reaching to the posterior angles; fifth seg- 

 ment similar, but the side spots less oblique. Legs light yellow ; last 

 three joints of all the tarsi, the hind tibiae, except the base and a middle 

 ring, and a ring on outer part of hind femora, brownish. Wings hyaline, 

 veins black. 



A widely spread and common species. I have it from Connecticut, 

 l^ew Hampshire, Kentucky, Colorado, California, and Washington Ter- 

 ritory. Schiner and v. d. Wulp record ifc from South America. 



Allograpta fracta. 



Allograpta fracta Osteu Sacken, West. Dipt., o31. 



jffa6i^af.— California (O. S.) ! 



'" $ . Length, 7"^™. Face,- including the frontal triangle, pale yellow, 

 slightly opalescent ; a bluish-black stripe extends from the oral edge 

 to the antennae, forming a semicircle above them. Antennae reddish, 

 third segment brown along the upper edge, vertex black. Thorax 

 bright metallic green, a pale yellow stripe on each side between the 

 humerus and the root of the wings ; ante-scutellar [post-alar] callosity 

 yellowish ; scutellum of a saturate yellow, the extreme corners dark ; 

 halteres with yellow knobs. First abdominal segment metallic green- 

 ish black, its extreme anterior margin only yellow; the rest of the ab- 

 domen black, opaque; an interrupted yellow cross-band on the second 

 segment equal to about one-third the segment in breadth ; a somewhat 

 broader, slightly arched, and not interrupted yellow cross-band on the 

 third segment ; on the fourth, two narrow, parallel, longitudinal lines 

 in the middle, and an obliquely-placed, large, oval spot on each side 

 of them, yellow; the narrow fifth segment shows a yellow picture, some- 

 what resembling that of the fourth segment. Legs yellow; tip of tarsi 

 brownish ; hind femora with a brown ring before the tip ; hind tibiae 

 with two such rings, one before the middle, the other before the tip ; 

 hind tarsi brown, except the under side of the first joint. Wings hya- 

 line ; stigma brownish yellow. 



