AMERICAN DIPTERA. 253 



color of tlie tlioi'acic dorsum is modified by ii hrownisli-yellovv pollen and yel- 

 lowish hairs, which cover its surface; the hairs longeron its sides; plcurjp and 

 sternum more grey, with paler yellow liairs; post-alter callosities reddish ; scu- 

 tellum brown. The abdomen, like tlie thorax, derives its colouring from a brown- 

 ish pollen which is darker on the posterior half of segments 2, 3. 4 (these seg- 

 ments thus showing slight traces of darker cross-bands); the base with longer 

 pale yellowish-rufous hairs; the posterior half of segment 2, as well as tlie two 

 following segments, beset with short, semierect black hairs; the three following 

 segments (5-7) are shorter and narrower and end in an ovipositor, which, so far 

 as I can see, consists of a short tube, longitudinally split in two. I-egs pale 

 rufous; hind femora slightly brownish at the tip; hind tarsi brown. Wings with 

 a pale brownish tinge, more yellowish along the costa ; veins on the antero- 

 proximal half rufous, on the remainder of the wing dark brown ; venation like 

 that of the European H. ohscura, only the handle of tlie folk of the third vein is 

 straighter. A single female in Prof. Bellardi's collection." 



Hiriiioiieura lexaiia n. sp. 



Hirmonfiira B, Cockerell, Amer. Jn. Sci.. April, 1908. p. 311. (Description and 

 figures of venation). 

 "J, .—Length about ll-i mm., wings 11; black, marked with red on the abdo- 

 men ; the abundant hair partly black and partly white; eyes purplish-red, almost 

 entirely covering the head, and covered with quite long black pile; lateral ocelli 

 touching eyes ; face and base of antennae with long black hair, mouth and cheeks 

 with white hair; exposed parts of front, face and occiput black ; third antennal 

 joint broad, approximately heart-shaped; style black; thorax rather dull dark 

 brown — between cofifee and slate color, densely white-haired on sides and be- 

 neath, above with the hair mostly black, but largely white on the disc; wings 

 hyaline, faintly dusky, splendidly iridescent; all the apical cells open; legs fer- 

 ruginous, blackened apically ; pile of femora white, except a little black at end. 

 of tibise and tarsi short and black; abdomen brown-black, with the hind mar- 

 gins of the segments ferruginous, very broadly so at the sides; approximately 

 basal half of segments with white hair, and apical with black ; at the sides this 

 hair forms conspicuous dense tufts, alternating black and white. 



ifa/>.— New Bi-tiunfek, Texas, May 12, 1902, taken liy Prof. A. 

 L. Melaiider on a barbed-wire fence. 



If irnioiieura nielamleri C'kll . Am. Jn. Sci., April, 190S, p. 311. 



Miocene shale.s of Flori.-^.-^ant. Length about 152 "im., wings 10. 



A second specimen (Floris.^ant, Sta. 14, W. P. Cockerell) shows 

 the abdomen and wings, but lacks the head and nearly all of the 

 thorax. It agrees with the type, except that the abdomen is very 

 long and tapering, the distance from the base of the wings to the 

 top of the abdomen being about 15 mm. In its general shape, the 

 abdomen is suggestive of some species of Xemestrina. The speci- 

 men is probably a female. 



Ilirinoiieura vuleanica Ckll., Am. Jn. Sci., April, 1903, p. 311. 



Miocene shales of Florissant. Length about 12 mm., wings 11. 



TEA.N6. AM. KNT. SOC XXXIV. AUGUST, 190b. 



