86 DIPTERA OF NORTH AMERICA. 



19. T. aequalis LOEW. ^ . (Tab. II, fig. 20.) Flava, unicolor, alis 

 sequaliter fusco-reticulatis, guttis hyalinis plerisque majoribus. 



Yellow, unicolored, with the brown reticulation of the wings very uniform 

 and most of the limpid drops of considerable size. Long. corp. 0.22 

 0.23. Long. al. 0.23. 



Totally yellow, also the hairs and bristles, only the anterior 

 frontal bristles and those at the hind border of the last abdominal 

 segment being brownish. . Front rather broad and short. Face 

 descending nearly straight, excavated a little above ; the border 

 of the mouth not projecting. Antenna yellow, slightly descend- 

 ing beyond the middle of the face, third joint rather narrow, bristle 

 with an extremely short, hardly visible pubescence. Opening of 

 the mouth small, a little prolonged anteriorly, so that its form is 

 almost triangular. Proboscis and palpi of middle size. The first 

 pair of the bristles inserted in the middle of the thorax, is very 

 near the transverse suture. Scutellum with four bristles. Legs a 

 little more slender than usual, tarsi longer; anterior femora rather 

 thick, with remarkable, pale yellowish bristles on the under side. 

 Wings of rather equal breadth, hyaline with a brownish reticulation 

 of unusual uniformity. Most of the drops forming it are rather 

 large ; those on the costal border are more oblong, and separated 

 by short blackish-brown rays ; the color of the reticulation near 

 the border of the wings is considerably darker than in the middle 

 of the wing. The small transverse vein lies far beyond the tip of 

 the first longitudinal vein, and a little beyond the third fourth of 

 the discal cell ; the posterior transverse vein is a little oblique. 



Hob. Illinois. (Kennicott.) 



20. T. f estiva LOEW. ^ and 9. (Tab. II, fig. 21.) Flava, unicolor, 

 terebra fceminje valcle elongata fusca, alis hyalinis insequaliter reticulatis, 

 in apice radiatis, pictura in basi et disco flavescente, prope marginem an- 

 ticum et in triente alarum apicali nigro-fusca. 



Yellow, unicolored ; the borer of the female brown and very prolonged ; 

 reticulation of the wings unequal, radiated in the apex, yellowish at the 

 base and in the disk, dark fuscous near the borders and on the apical 

 third of the wing. Long. corp. $ 0.170.18, J 0.200.23. Long, 

 al. 0.22. 



Rather bright yellow ; hairs and bristles almost all of the same 

 color, only the anterior frontal bristles as well as the bristles of 



