AMERICAN DIPTERA. 295 



Cyrtopog-on varipeimi.s. 



Cyrtopogon varipennis Coquillett, Proc. Ent. Soc. Wash., VI, 

 184, 1904. 

 (^ '^.—"Length 7-10 mm. — -Near nebulo, but the first basal cell 

 marked with two black spots near the middle, etc. Black; the hal- 

 teres dull yellow. Face rather strongly convex, mystax black, some- 

 what sparse; hairs of front and on upper part of occiput chiefly black, 

 those on remainder of occiput whitish; third joint of antennse slightly 

 longer than the rather slender style. Mesonotum quite densely cov- 

 ered with rather long erect black hairs, the bristles scarcely longer or 

 stouter than the hairs; mesopleura and sternopleura hairy, ptero- 

 pleura bare, hairs of hypopleura mixed black and white; scutellum 

 convex, not pruinose, the upper surface rather densely covered with 

 long whitish hairs, the many marginal bristles very slender, chiefly 

 white, but several are brown on the basal portions. Abdomen polished; 

 the hind angles of the flrst six segments marked with a gray pruinose 

 spot. Hairs and bristles of legs whitish, many of the bristles with 

 brown bases; tarsal claws black. Wings gray, with a few hyaline 

 spots and streaks ; the costa from apex of axiliary vein to apex of 

 upper branch of the third broadly bordered with brown, a dark brown 

 spot in base of flrst submarginal cell extending across the marginal, 

 one in base of second submarginal, first and second posterior and 

 two near middle of flrst basal cell; of the last two spots, one is along 

 the basal part, the other along the apical portion of the prefurca of 

 the third vein; the brown spot on the small cross- vein extends to 

 apex of discal cell; small cross- veins slightly beyond of discal cell." 



Type. — U. S. N. M., Cat. No. 7959. One male and two 

 female specimens. 



Habitat. — Washington State (Prof. O. B. Johnson). 



The following references should be examined before new 

 species are created. 



Cyrtopogon, n. sp., Williston, Trans. Am. Ent. Soc. Phila., XI, page 12. 

 Cyrtopogon, n. sp., WilHston, Trans. Am. Ent. Soc. Phila., XI, page 13. 

 f Cyrtopogon, n. sp., Williston, Trans. Am. Ent. Soc. Phila., XI, page 



14 (PI. I, flg. 11). 

 f Cyrtopogon {fLasiopogon), n. sp., Williston, Trans. Am. Ent. Soc. 



Phila., XI, page 14. 

 Cyrtopogon, n. sp., Jones, Trans. Am. Ent. Soc. Phila., XXXIII, page 



277. 



TRANS. AM. ENT. SOC, XXXV. AUGUST, 1909 



