374 
C. II. TYLER TOWNSEND. 
pair of costal spines ; ajiical cell clo.sed in the margin, or very short 
pctiolate, ending oidy a little before the tip of the wing ; posterior 
cro.ss-vein nearer the bend of the fourth longitudinal, which is an- 
gular and without stump or wrinkle ; third vein spined on proximal 
one-fourth of its length. Type, A. singn/m'is n. sp. 
This genus seems to a])proach Eggeriu somewhat. It did'ers very 
markedly, however. The arista is clothed with very short pubes- 
cence ; the sides of the face are not broad ; the facial ridges are hare, 
while the frontal bristles extend down in a row almost to the vi- 
hi’issie ; the front is not prominent, and the face is not so receding as 
in Eggeria ; the eyes are only thinly and short hairy, chiefly on their 
lower portions; the antenme are shorter than the fiice, the palpi are 
filiform, and the abdomen is sub-conical. 
.Vti’0l>li0|>0<la Kiligiilarilit u. sp. 'J, . — Black, silvery and cinereous. 
£'?/e.s reddish brown, short and thinly ])ubescent, almost entirely on lower por- 
tion ; face and cheeks silvery pollinose ; front broadly cinereous on each side of 
the frontal vitta, wliich is black and split behind, a pron" rnnnin}; to each bristle 
on the vertical angle, thus enclo.sing the ocellar area ; two pairs of ocellar bristles, 
a small pair at vertex almost straight, but inclined slightly forward and outward, 
and a somewiiat longer curved pair in front inclined outward and strongly for- 
ward ; some weak bristly liairs between the bristles; first two antennal joints 
blackisli. second joint slightly tinged with flavous, bristly with two longei' bris- 
tles on the front border below ; third joint yellowish at base, remainder blackish, 
somewhat thinly but evenly covered with a very short, delicate pubescence ; 
arista black; proboscis dark brown; palpi light yellowish, with some black 
bristles, two longer ones on the. underside near the ti]i; occiput cinereous above, 
silvery on the sides and below, clothed with white hairs, with a fringe of black 
bristles on the orbital margins. Thorax and scntelliun silvery cinereous above, 
clothed with a few very short scattered bristly hairs and stout posteriorly in- 
clined bristles, with two broad heavy blackish or brownish black vittte termi- 
nating abruptly at the scutellar suture; humeri and pleurae silvery, some bristles 
below humeri inclined outward, forward and upward ; some on posterior portion 
of plenrte inclined outward and backward, excejit two lowest, the posterior one 
of which is inclined upward, (tntward and backward, and the anterior shorter 
one ui)ward, outward and forward. Abdomen shining black, covered with short, 
black, appressed bristles; bases of second to fourtb segments silvery; first seg- 
ment with a lateral marginal niacro(dueta ; second with a lateral marginal one 
and a median pair ; third with six marginal above, continued by others on the 
underside growing smaller toward the middle of the venter; fourth segment 
with a median discal pair, continued by discal bristles on the venter, a lateral 
snb-discal one on each side, and four marginal above with several belotv ; venter 
largely silvery. Legs black; coxre silvery and bearing some black bristles; 
femora slightly cinereous or silvery, covered with short black hairs and a few 
black bristles; front tibise with an anterior apical pair of short bristles, and 
usually a very short bristle or tvvo toward the middle of the anterior surface; 
the other tibire with several variously disposed stouter bristles; anterior claws 
