NORTH AMP:RICAN 1)IPTI:RA. 
351 
hairs amons the In-istles; first and second antennal joints reddish yellow, secord 
hlack-hristly, a longer bristle on the lower front border; third joint and arista 
blackish, the third joint a little less than twice, as long as the second ; proboscis 
black, palpi reddish yellow, with several black bristles on underside; occiput 
cinereous pollinose, gray hairy, with a fringe of black bristles on orbital mar- 
gins. Thorax and scutellum cinereous pollinose, covered above with .short, black, 
bristly hairs and long black bristles posteriorly inclined ; the thorax with two 
median, posteriorly divergent black vittre, which generally become obsolete a 
little behind the transverse suture, and with a wider, irregularly defined, inter- 
rui)ted blackish vitta outside these which runs nearly to the scutellum ; humeri 
and pleuraj cinereous polliose, covered with short hlack bristly hairs; the pleuia* 
with black bristles on the hind border posteriorly inclined, except the two lower 
ones which are anteriorly inclined ; some bristles below humeri directed upward, 
outward and forward. Abdomen cinereous pollinose, covered with short, black, 
depressed bristles, with some longer bristles on the sides and beneath ; first seg- 
ment bearing a lateral marginal macrochaeta usually with a weaker one in front 
of it; second with a lateral marginal one, a weaker one outside it, and a median 
marginal pair above; third segment with eight marginal macrochsetfe, the outer 
ones below the lateral border; fourth segment with six marginal ones above and 
several intermixed with shorter bristles below. Legs black, more or less cinere- 
ous ; femora and tibiae black, hairy and with stout bristles, particularly the tihiae ; 
coxse with posteriorly directed bristles on the forward surface; claws and pul- 
villi rather short. Wings grayish hyaline, slightly flavous at base, veins mostly 
flavous ; first longitudinal vein spined nearly to the costa; tegulfe silvery white, 
with fiavous borders; halteres fuscous. Length 8—9 mm. ; of wing about 6 mm. 
Described from three female specimens ; Las Cruces, New Mexico. 
Taken June 9-10 on flowers of Aster spinosns. This seems to ap- 
proach V. (1. Wulp’s Flagia incognita, but it has a long stump at the 
bend of the fourth vein, and the abdomen is nearly uniform cinereous 
pollinose instead of hlack with gray front borders to tlie segments. 
CiOXIOt’H.ETA*- n. gen. 
Like Siphoplagia, hut with short fleshy proboscis, a row of bristles 
on the sides of the face, and short, distinctly geniculate arista. 
Belongs in the suh-grouj) with Flagia. Head, thorax and abdomen 
of equal width in 9 ; the abdomen of % narrower. Eyes bare ; 
front broad, prominent; vibrissre decussate and inserted near oral 
margin ; frontal bristles arranged as in Siphoplagia (except the 
ocellar bristles) ; three orbital bristles in both sexes, the middle one 
weaker ; sides of face and front with some fine, short, scattered 
hairs; cheeks about one-third of eye-hight in 9 , one-fourth in %, 
bare, with a fringe of bristles on lower border ; facial ridges bare ; 
sides of face with a row of bristles descending to near the oral mar- 
gin as though a continuation of the frontal row. Proboscis rather 
I'or'v (knee) -f- (clueta). 
