48 
2. Without any fascivw of gray pollen on the abdomen, which is sub- 
shining and almost or wholly destitute of pollen............ 3 
With an opaque, interrupted fascia of yellowish pollen on the second, 
third, and fourth segments of the abdomen; scutellum and 
femora yellow, thorax shining black, the portion in front of the 
transverse suture yellowish pollinose and marked with three or 
four black vittie; wings brown, the costal margin more or less 
yellow, the hind margin broadly hyaline; lower calypteres yel- 
lowish; length, 7 to 11 mm. District of Columbia; Texas, and 
Napa County, Cal. (Systema Antliatorum, p. 220; 1805: The- 
reva. Trichopoda histrio Walker, List of Dipterous Insects, 
Part LV, p.697; 1849. Trichopoda trifasciata Loew, Dipt. Amer. 
Sept. Indigena, Centuria IV, No. 90; 1863: also Brauner and 
Bergenstamm 27 tia) 202: e eee eee ee plumipes Fabr. 
3. Lower calypteres wholly yellowish; abdomen bright yellow, the apex 
_— 
sometimes black; legs black, bases of femora sometimes yellow, 
hind margin of wings subhyaline._ 22:2. sse.2.4 25-2 ee ee 4, 
Lower calypteres brown, the bases white; abdomen yellowish brown, 
the fifth segment yellow, legs black, the bases of the middle 
and hind femora sometimes yellow; wings brown, a white vitta 
along each of the first five veins, hind margin subhyaline; 
length 14 to 17 mm. District of Columbia; Waco, Tex., and 
Tehuantepec, Mexico. (Aussereuropiiische Zweif. Insekten, Vol. 
II, p. 268; 1830. Trichopoda radiata Loew, Dipt. Amer. Sept. 
Indigena, Centuria IV, No. 89; 1863: also Brauer and Bergen- 
Stamamacvn litt.) 280 Seen eee ee. aay ae eer eee Jormosa Wied. 
4, Penultimate section of fourth vein of male bordered in front with 
—_ 
whitish, the first five veins usually partly bordered with white, 
a yellowish spot on front part of each wing of the male; length, 
9to14mm. West Roxbury, Mass.; Distriet of Columbia; Vir- 
- ginia; Tifton, Ga.; Biscayne Bay, Florida; Cadet, Mo.; Douglas 
County, Kans., and Texas. (Aussereuropiiische Zweif. Insek- 
ten, Vol. Il, p.276; 1830. Thereva pennipes Fabricius, Systema 
Antliat., p. 219; 1805: non Musca pennipes Fabricius; 1794. Tri- 
chopoda aurantiaca Townsend, Proc. Ent. Soc. Washington, Vol. 
Lisp. 1403 April 27 a Sok.) Osc ns Se ee eee cilipes Wied. 
Penultimate section of fourth vein not bordered with whitish in 
either sex, any of the veins rarely bordered with whitish; wings 
of male usually but not always marked in front with a yellow 
spot; length, 7 to 12mm. Grimsby, Canada; Belmont, Mass. ; 
Philadelphia, Pa.; District of Columbia; North Carolina; Flor- 
ida; Mississippi; Lexington, Ky.; Missouri; Onaga, Kans.; 
Colorado; Los Angeles County, Cal., and Mexico. (Hntomolo- 
gia Systematica, Vol. IV, p. 348; 1794: Musca. Thereva hirtipes 
Fabricius, Systema Antliat., p. 219; 1805.  Ocyptera ciliata 
Fabricius, loc. cit.,p.315. Phasia jugatoria Say, Jour, Acad. Nat. 
