SYNOPSIS OF NORTH AMERICAN SYRPHID^. 145 



yond tlie third seg-meiit, longer, whitish. Legs black, with black pile, 

 the first and second joints ol all the tarsi yellow, the knees more or 

 less reddish. Wings with brown markings as follows: across from the 

 origin of the third vein to the origin of the posterior basal cross-vein, 

 from the tip of the auxiliary to the fourth, clouding the anterior 

 cross- vein, and from the costa beyond the auxiliary vein to the outer 

 posterior angle of the discal cell, sharply defined on its inner border 

 and reaching to the tip of the third vein, the posterior portion infus- 

 cate, the costal cell somewhat brownish ; anterior cross- vein oblique, a 

 little before the middle of discal cell ; end of marginal cell expanded. 

 Four specimens (Professor Riley). 



Volucella fasciata. (Plate VI, fig. 4.) 



FoJiiccllafasciata'Macqna.vt, Dipt. Exot., ii, 2,22, 2; pi. v, fig. 2; Osteu Sacken, 

 AVest. Dipt., 33-1. 



Eahitat. — Western Kansas, Colorado, Texas, Mexico, Carolina ! 



<? . 9 . Length, 7 to 8™"'. Resembles pusilla closely, but is distinct. 

 The yellow stripe of the cheeks is broader, the antennoe yellow, brown- 

 ish toward the tip, the yellow lateral stripes of the dorsum of the thorax 

 narrower, the meso-pleural spot smaller, and in addition there are three 

 small spots below, nearly touching each other, the hindmost one in front 

 of the halteres. The abdomen has three rather broad yellow bands ; 

 the anterior one on the second segment the broadest, widest toward 

 the middle, interrupted or subinterrupted ; the others, on the anterior 

 part of the third and fourth segments, entire ; venter, in addition to the 

 broad basal baud, with one on the third segment. Legs black; the 

 knees, basal portions of the tibiae, and first three joints of all the tarsi, 

 yellow. Wings with the markings similar in pattern to pusilla^ but 

 faint, showing indications of three or four fasciae; the small cross- vein 

 more oblique, and joining the fourth vein very near the middle of the 

 discal cell. 



It is not improbable that this is the V. vacua of Walker, List, etc., 

 iii, 637. 



Volucella victoria, u. sp. 

 Sahitat. — ^ew Mexico ! 



5 . Length, 9.5™™. Deep shining blue-black. Front and face amber 

 yellow, the cheeks shining black ; lateral cresceutric grooves of the front 

 very distinct ; a minute spot at the ocelli black ; pile black ; face be- 

 low the antennse very shallowly concave, produced downwards into an 

 acute cone, thinly black pilose. Antennae wholly yellowish-red ; third 

 joint of moderate length, a little broader at the base, scarcely emargi- 

 nate above ; arista black, moderately plumose. Occiput black, excei)t 

 for a little distance below the vertex, on the sides dusted with whitish. 

 Thorax thinly pilose, in front chiefly light colored, behind chiefly black. 

 Scutellum deep pitchy-black ; on its border, and also on the post-alar 

 callosities, with fine black bristles. Abdomen with a blue reflection, 



