47 



10. Le:igfcli, () mm. or less ; last section of third vein over one-tbird as 



long' a -^ the precedinji" section 11. 



Length. S to 10 mm 12. 



11. Abdomen shining' brassy black, the margins whitish pollinose, 



wings hj'aline, the base and a large spot on middle extending 

 from costa to fifth vein smoky. (See above under 1.) 



(T ^ (vneoventris Will. Ja^ 



Abdomen subopatpie whitish pollinose, the first segment, a dorsal 

 vitta on the others, and the hind margins of the second and 

 third l»lack; black, the i)alpi yellow; thorax, when viewed from 

 behind, snbopaque, tracesof a yellowish pollinose spot in front 

 of the scntelkunj eyes separated slightly wider than width of 

 lowest ocellus, wings smoky, the hind margin subhyaline; 

 cal^qjteres yellowish; length, nmi. Woodbury, IST. J. A 

 single male specimen, collected June 7, 1806, by C. W. Johnson. 

 Type Xo. 3526, U. S. I^ational Mnsenm. A . ^. .snhopai'a n. sp. 



12. Last section of third vein less than one-sixth as long as the pre 



ceding vsection, small crossveiu nearer to tip of auxiliary vein 

 than to tip of first vein, eyes separated less than width of low- 

 est ocellns, wings from base almost to small crossveiu dnsky 

 yellowish, the renniinder brown, calypteres brown, the margin, 

 the lower edge of the front one broadly, and of the hind one at 

 its base white; otherwise as in the femafe/^fu^lder 5 above). 

 Lufkin, Tex., October 17, 1896. A single male specimen, col- 

 lected by C. \V. Johnson £f^. .^r-. . . .graudis n. sp. 



Last section of third vein over one-fourth as long as the preceding 



section, small crossveiu not nearer to tip of auxiliary vein than yV'/^^x^/ifi^ir-^ 

 to tip of first vein, eyes separated one and one-half times width j^^ 



of lowest ocellus, abdomen with a strong brassy or violaceous 

 tinge, wings from base to beyond base of discal cell yellowish, 

 the remainder brown, the hind margin subhyaline; otherwise 

 as in the female (under 5 above). Beverly, Mass. (October 11, 

 1870, Edw. Burgess) ; Oswego, N. Y. (October 4, 1895, C. W. 

 Johnson), and Indiana. Three male sjiecimensiJ^f/ivtTSfl u, sp. . 



"^ Genus TRICHOPODA Latr. •' i \o fT^ )^ du 



Trichopoda l.;itreillc. iu C'nvier's Kcgue aiiimal./J'ol. X ; 1821). ^ ' ^ •'^'^ 



Our s[)ecies have one postsutnral and two steruopleural uiacroch;eta3, 



apical cell short petiolate: 



1. Abdomen partly or wholly yellowish . . <?r. .h A.Kit ^y. . .P.r^. />».«> e_ 2. 

 Abdomen and legs wholly black, the former not pollinose; wings 

 black, not marked with Avhite or yellow, the hind margin sub- 

 hyaline; lower calypteres brown, the bases white; thorax deep 

 black, the sides, transverse snture, and two subdorsal vittte in 

 front of it light gray pollinose; length, 10 to 11 mm. Florida; 

 Waco, Tex., and Colorado. (Systema Antliatorum, p. 220; 

 1805 : Thereva.) 4:^ry. pr.*-. . .^jh. f.h. . A^h.^. . . ^ lanijien Fabr. 



