AMERICAN DIPTERA. 249 



the male, in the female thinner and paler; pile of basal segments of 

 antennas, frontal orbits, ocellar tubercle, and occiput above, more 

 fulvous, of the beard and proboscis much paler. Antennas black, 

 elongate; segments 1 and 2 cylindrical, segment 1 a trifle longer; 

 segment 3 longer than segments 1 and 2 together; style distinct from 

 segment 3 and about one-fourth as long. Dorsum partially concealed 

 beneath fine appressed fulvous pile and longer and weak bristles of 

 the same color above the wings, on the posterior portion, and on the 

 posterior margin of the scutellum; pleurae polished, but obscured in 

 places by a pale yellow bloom and short fine pile, especially on the 

 sides of the prothorax and on the meso- and sternopleuras; trichostical 

 pile long and pale, halteres yellowish. Abdomen polished black, 

 scarcely at all obscured by the short yellowish pile, which on the sides 

 of segments 1 and 2 is long. Hypopygium larger than that of Echtho- 

 dopa majus (European), black, with black pile. Legs black; coxae 

 with rather long whitish hair, more abundant on the two anterior 

 pairs; femora, excepting the fore pair, with a few short, stout bristles 

 on the anterior side; pile of femora and the yellowish portion of the 

 tibiae golden in the male, pale in the female; of the rest of the tibiae 

 and tarsi black; bristles on the tarsi black. Claws black, yellowish 

 at base; pul villi tawny. Wings very faintly blackish hyaline; all the 

 posterior cells open, the anal narrowly so; the anal, axillary cells, and 

 second basal slightly milky white in the male; wholly clear in the 

 female. 



Type. — M. C. Z. A single male in excellent condition. 



Habitat— North Saugus, Mass. (E. A. Back, June 14, 1906); 

 Delaware Co., Pa. (July 1, 1892, C. W. Johnson); Va.; N. C. 



This species may readily be separated, at a glance, from 

 pubera by its deeper, clearer, and more shining black color, 

 its clearer wings, and by the brightness of the yellow portion 

 of the tibise. Its pile is also less in quantity and richer in 

 color: pubera is only moderately polished, the pile paler, the 

 wings more dusky, and the veins bordered with fuscous. 



During the summer of 1906, in a large cage built over a 

 small oak tree in the woods for the rearing of parasites in con- 

 nection with the gypsy moth work, I captured two specimens 

 of this species which evidently had emerged from the partially 

 moss-covered ground. 



Echthodoim pubera (PI. VIII, fig. 6). 



Echthodopa pubera Loew, Cent., VII, 27, 1866. 



Echthodopa pubera Jones, Trans. Am. Ent. Soc, XXXIII, 276, 



1907 (locality note) . 

 Echthodopa pubera Insect Book, Howard, 1902, PI. XIX, fig. 2. 



TRANS. AM. ENT. SOC, XXXV. (32) JULY, 1909. 



