12 PEOCEEDINGS OF THE NATIONAL MUSEUM. vor. 60. 



dull, blackish, covered with a little yellowish dust. Antennae en- 

 tirely light yellow and short; first joint swollen at apex, nearly equal 

 to the length, short bristly hairs on upper side at apex only ; second 

 joint quite rudimentary ; third joint slightly rounded. Arista about 

 as long as the face, entirely black. About the basal fifth is straight. 

 at the end of this fifth it appearcs to be broken or bent and from 

 here it tapers on to a very thin stem ; at the apex is a small elliptical 

 lamella pointed at the tip. Orbital cilia black. Thorax mostly 

 blackish, covered with a dark-brown pollen. There is a bluish-green 

 area covered with a white pollen reaching from one wing around 

 the edge to the other wing. This area is broken by a brown stripe 

 in the middle of the front edge of the thorax. The posterior corners 

 of the thorax are flattened and covered with a white pollen, just 

 above each of these spots is a small area, somewhat triangular, cov- 

 ered with a silvery dust. On the side of the thorax opposite the 

 root of the wing is a large, velvety black spot. Scutellum metallic 

 black with just a little brown dust. Abdomen metallic greenish 

 black with considerable whitish pollen, especially on the sides and at 

 the base. Hypopygium large, black, shining on the inner side, cov- 

 ered with whitish pollen on the outer surface; lamellae nearly round, 

 black, fringed with black hairs, inner appendages shining black. 

 Coxae black with white pollen, fore coxae with j^ellow pollen and 

 black hairs and bristles on the front surface; femora deep metallic 

 green, dusted lightly with a whitish dust ; tips of all femora, middle 

 tibia except apical fourth, basal three-fourths of middle metatar- 

 sus reddish-yellow ; hind tibiae, tarsi, tips of middle tibiae, tips of 

 fore and middle metatarsi, the last four joints of the fore and middle 

 tarsi reddish-black ; front tibia pale yellow, very broad on the apical 

 two-thirds, the lower edge with a series of broad, flat bristles de- 

 creasing in size toward the apex. Basal three-fourths of front 

 metatai-sus pale yellow. Wings grayish hyaline, costal vein greatly 

 thickened near the base ; halteres reddish-yellow. Tegulae pale yel- 

 low with black cilia. 



Female. — Very much like the male. Face wider, silvery. Antennae 

 normal, artista short about three-fourths as long as face. Legs mostly 

 greenish-black, front tibiae normal ; tibiae yellowish except towards 

 the tip ; base of metatarsi yellowish. 



Type lo<iality. — Manahawkin, New Jersey, May 30, 1910- July 31, 

 1912, H. S. Harbeck, collector. 



Four specimens deposited in the United States National Museum 

 by J. M. Aldrich. 



Type. — In collection of M. C. Van Duzee. 



