BUFFALO SOCIETY OF NATURAE SCIENCES 165 



23. Third antennal joint large with a rather sharp point, as 



long as the two basal joints together. (When viewed from 



the outer side). 24. 



Third joint distinctly shorter than the two basal joints or 



rounded at tip. 28. 



24. Hind tibiae yellow. 25. 

 Hind tibiae and all tarsi black or brown. 27. 



25. Thorax with a coppery vitta. 14 vittatits n.sp. 

 Thorax without a vitta. 26. 



26. Hind tibiae entirety and hind tarsi partly yellow. 



19, leucostoma Loew. 



Hind tibiae with the tip broadly and hind tarsi entirely black 

 or brown. 20, leucostoma Loew. var. infuscatiis n. var. 



2?'. Point at tip of third antennal joint rather short (Fig. 11). 



22, occidentalis n.sp. 



Point at tip of third joint long. (Fig. 10). 



21, quadratics n.sp. 



28. Third antennal joint about as long as the first, as broad as 



long with a short but sharp point at center of apex (Fig. 



1). 23, parmatus n.sp. 



Third joint rounded at tip. 29. 



2d. Third antennal joint as long as the first two (Fig. 2) ; 



palpi small. 24, remulus n.sp. 



Third joint shorter than the first ; palpi as large as usual. 30. 



30. Third antennal joint short, rather flattened at tip ; arista 



apical; third vein bent. (Figs. 3 and 14). 



25, repandus n.sp. 



Third joint small, slightly pointed at tip; arista subapical 



(Fig. 4) ; third vein nearly straight. 26, nsitatus n.sp. 



31. Color blue-green; last section of fourth vein considerably 



bent. 27, aldrichi n.sp. 



Color green, inclined to golden ; last section of fourth vein 



nearly straight. . . 28, similis n.sp. 



32. Outer appendages of the hypopygium are large spatuleate 



lamellae. 1, lamellatus Loew. 



Appendages small, not lamellaform. 33. 



