300 E. T. CRESSON, JR. 



a sharp, prominent, vertical keel ; intermediate and ventral lobes 

 hardly visible (Figs. 67-68). Legs black, clothed sparsely with white 

 pile ; coxse generally, extreme bases and apices of femora, broad 

 bases and sometimes broad apices of tibiae, anterior pair often en- 

 tirely, more or less of basal tarsal joints, and pulvilli, yellow. The 

 legs are sometimes nearly entirely black, the yellowish parts being so 

 very obscure as to be hardly noticeable ; all femora have the usual 

 flexor spines. Wings grayish hyaline, or of a brownish tinge (Fig. 

 174). Length, 3.5-5.0 mm. ; wings, 4.5-5.6 mm. 



9 . Unknown. 



Described from District of Columbia; also reported from 

 New Hampshire (1896 Slosson 263), Before me are speci- 

 mens from the following localities : Cottage Beaulieu, Beau- 

 lieu, Quebec (1, Beaulieu, coll. Jolmson); Mt. Ascutney, Vt., 

 1; Norwich, Vt., 1; Montpelier, Vt., 1; Auburndale, Mass., 

 2, Figs. 17, 67, 68, 174; Hanover, N. H., 2 (all by Johnson, 

 B. S. N. H.); Ithaca, N. Y. (1, coll. Johnson ; 2, coll. Banks); 

 Harrisburg, Pa. (1, Walton, coll. Banks); Swarthmore, Pa. 

 (Cresson, A. N. S.); Manayunk, Pa. (2, Johnson, A. N. S.); 

 Black Mountains, N. C. (1, Figs 69-70, coll. Banks). Taken 

 May to September. 



This species is readily distinguished by the non-cinereous 

 abdomen, with bases of segments opake, and their apices 

 polished, having large, very assymetrical hypopygium. 



Before me is also a specimen from Glencarlyn, Va. (coll. 

 Banks), which is smaller than usual, and the abdomen and 

 legs are not all pilose, but otherwise typical. 



The variety velutinus n. var., Swarthmore, Pa., June 19, 

 1910 (Cresson, A. N. S., Type No. 5026), has no tinge of gray 

 anywhere except on the head ; is more robust than the typical 

 form, but most distinct in having the abdomen entirely opake, 

 velvety brown ; the hypopygium is also more developed. I 

 at first thought it a new species, but receiving a specimen 

 from the Black Mountains, N. C. (Figs. 69-70, coll. Banks), 

 having the apices of the segments polished, although agree- 

 ing with the type in other respects, I reduced it to variatal 

 rank. I have also another specimen from Glenside, Pa. (Fig. 

 71, coll. Johnson), agreeing with the type. 



