SYNOPSIS OF NORTH AMERICAN SYRPHID^. Ill 



of the third segment ; black, except the fifth segment and the hypo- 

 pygium, but slightly shining; second segment across the middle with two 

 coalescent transverse spots ; the third and fourth segments on the basal 

 half reddish or brownish yellow. Coxae and legs yellow, the four front 

 femora and tibiae in the middle yellowish brown, the hind legs, with 

 the exception of the base and extreme tip of the femora, black. Pile 

 of the whole body short, soft, and sparse. Wings hyaline, the outer 

 part cinereous; stigma brownish yellowish. 



One specimen. District of Columbia (Theo. Pergande). 



A female discovered with the last, which I have since examined, has 

 the second abdominal segment with a broad median band, the third seg- 

 ment, except the narrow hind margin, and the anterior two-thirds of the 

 fourth segment, all pure yellowish red. The abdomen is of nearly equal 

 width throughout, scarcely at all wider than the thorax. The third joint 

 of the antennae does not appear to be produced into a cylindrical pro- 

 cess, but the projection, which is as long as in the male, seems to be 

 wholly composed of the style. 



NEOASCIA, NOM. NOV.* 



Ascia Meigen (non Scopoli), Syst. Be8chr.,iii, 185, 1822. 



Small, slender, nearly bare species, black or metallic green, with or 

 without reddish or yellow on the abdomen. Antennae shorter than the 

 head ; third joint oval or obtusely pointed ; arista near the middle of 

 the joint, bare. Face black, even, without tubercle, conically produced 

 downward and forward, so that the profile is gently and evenly con- 

 cave from base of antennae to oral margin. Eyes bare, separated by 

 the front, which is rather broad in the female, narrower in the male. 

 Abdomen about twice as long as the thorax; second segment narrow, 

 widened posteriorly; third and fourth broad and arched; in outline 

 short club shaped. Front and middle legs slender, hind femora very 

 much thickened and with a row of short spines below; hind tibiae bent. 

 Marginal cell of wings open ; anterior cross- vein before the middle of the 

 discal cell ; the last section of the fourth vein joins the third in a right 

 angle, the anterior angle of discal cell also a right angle; third longi- 

 tudinal vein straight. 



Neo^cia globosa. (Plate IV, figs. 10, 10a.) 

 Ascia globosa Walker, List, etc., iii, 546. 

 Ascia metallica Williston, Proc. Am, Phil. Soc, xx, 315. 

 Ascia nasuta Bigot, Annales Soc. Ent. de France, 1883, 327. 

 Ascia quadrinotata Bigot, ibid. 

 Ascia aliipes Bigot, ibid., p. 328. 



Habitat. — New England, Oregon 1 



9. Length, 3^ to 5™«i. Front bronze black, shining, delicately 

 roughened. Face with a bluish reflection, lightly covered with whitish 



*Neof, new ; ascia, a mason's trowel. 



