224 DIPTERA OF NORTH AMERICA. [PART IV. 



Head cinereous; palpi black, short, especially the three last* 

 joints ; antennae brownish-tawny, basal joints darker ; they are 

 short in both sexes ; when bent backwards, they would not reach 

 beyond the root of the wings ; joints of the flagellum subglobular 

 or short-oval ; those of the male are clothed on the under side 

 with a dense pubescence ; verticils distinct, moderately long. 

 Thorax yellowish-gray, with indistinct brownish stripes, the 

 intermediate double ; halteres with a brown knob, sometimes 

 pale ; feet with a comparatively long pubescence, tawny, cox£e 

 and basis of the femora paler ; tips of the femora and extreme 

 tips of the tarsi sometimes slightly infuscated. Abdomen brown- 

 ish, margins of the segments darker. Wings Avith brown spots 

 along the anterior margin : the first and smallest at the humeral 

 cross- vein ; the second between it and the origin of the prae- 

 furca ; the third on the latter; the fourth at the tip of the aux- 

 iliary, the fifth at the tip of the first longitudinal vein ; there are 

 smaller spots or clouds at the tips of all the longitudinal veins, 

 except the third ; all the cross-veins and the inner end of the first 

 submarginal cell are also clouded with brown ; the first and fifth 

 longitudinal veins, in the intervals of the brown spots, are usu- 

 ally yellow. The petiole of the first submarginal cell is rather 

 long, longer than the great cross-vein ; prsefurca angular at its 

 origin ; sometimes provided with a stump of a vein ; second sub- 

 marginal cell distinctly longer than the first posterior ; a super- 

 numerary cross-vein in the middle of the second basal cell ; the 

 seventh longitudinal vein is gently sinuated in the middle and 

 incurved at the tip. 



Hah. Washington, D. C, in the spring; White Mountains, N. II. 



The male forceps of this species (Tab. IV, fig. 23) is somewhat 

 peculiar; the horny appendages are short, stout, obtuse, pro- 

 vided with a deep notch at the tip (1. c. fig. 23«). The ovipositor 

 ii very long and slender, gently arcuated. This species belongs 

 to the genus Eplxelia Schiner (compare p. 199), and is very much 

 like an unnamed European species (perhaps guttata Macq. ?). 



I possess a couple of specimens with comparatively shorter and 

 broader wings, larger and darker spots ; the horny appendages 

 of their forceps (as I have noticed upon a fresh specimen), 

 although also cleft, are less blunt at the tip and more elongated. 

 I do not think that such specimens are specifically distinct. 



