SYNOPSIS OF NORTH AMERICAN SYRPHID^. 215 



ancl a spot on tbe upper i)art of nieso pleurie, opaque yellow. Margin of 

 scutellum yellow. Abdomen black, second segment on the sides with a 

 large triangular yellow spot; in the female the third and fourth segments 

 on the sides in front with a rectangular spot, bioadly sei)arated, and the 

 fifth segment yellow, except the black tip, which is prolonged narrowly 

 to the front in the middle; in the single male si)ecimen the yellow spots 

 on the third segment are smaller, and the fourth and tilth segments are 

 wholly black. Legs yellow, front and middle femora at the base, a ring- 

 before the tip of hind femora, and likewise of the hind tibia?, brownish 

 black; posterior metatarsi infuscate, last three joints of all the tarsi 

 black. Wings hyaline, somewhat clouded on the outer part, the veins 

 ^t the base and in front yellow. 



Two si)ecimeus. An additional female in the M. C. Z. (Loew's col- 

 lection) from California. 

 ' This may be the same species as the following : 



Criorhina rCynorhina) notata. 



Milesia «o/«7a Wiedemann, Auss. Zw. Ins., ii, 109,7; Macquart, Dipt. Exot., 



u,2,60,2; tab. xv,H<r. .'). 

 SyrphiiH profitsna Walker, List, etc., iii,578. 



Habitat. — Savannah (Wied.). 



^^nea. abdomine uigro, maculis duabus, scutelli apice, genicnlisque 

 ferrugineis. liiickenschild erzfarben ; Hinterleib schwarz, zwei Flecken, 

 Spitze des Schildchens und Kniee rostgelb. — Lange 5^ Linien, $ . 



Antenna? blackish-brown, hind border of third joint ferruginous 

 yellow. Face yellow, like half bleached wax, in some reflections nearly 

 brassy-yellow shining ; lowest part of front, on which the antennte are 

 situated, similar. Thorax yellowish metallic with yellow ])ile, base of 

 scutellum blackish, tip yellow. Plenrse blackish, with a broad yellow- 

 ish metallic stripe covered with yellow pile. Abdomen bhu-k with yel- 

 lowish pile; base of second and third segments on each side with a 

 small ierrngiuous spot, on the second the inner end crescentric, on the 

 third the spot is shorter, nearly quadrate. Wings nearly hyaline, the 

 costa strongly yellowish, towards the end a little biownish, the basal 

 veins, the stigma and the halteres yelkwish. Legs pitchy-blackish 

 brown, base and tip of the femora ferruginous yellow, tibia' the same, 

 in some reflections a little whitish; hind tibi;e in the middle broadly 

 brown; anterior tarsi ferruginous yellow with brown tip, hind ones 

 nearly wholly brown. — Translation from Wiedemann, 1. c. 



This species must be very similar to the preceding; \t may be the 

 same, but comparison is needed with Eastern specimens before sup- 

 pressing hiimeralis. See CriorJiina pictipes, Api^endix. 



Criorhina (Cynorhina) scitula. 



Criorhhia sfiliiJa Williston, Proc. Am. Phil. Soc, xx, 331. 

 Habitat. — Washington Territory ! 



5,9. Length. 10 to 13""". Face yellow, with whitish dust on the sides, 

 considerably concave below the antenna? in the male, in the female less 



