332 iS. W. Williston — North American Conops. 



fourth very uarrow, gray or slightly yellowish hind borders ; sixth 

 segment, on^the end, thickly dusted with gray, yellowish at the tip. 

 Legs reddish brown (or " brownish black," Loew), marked quite as 

 in excisns. Color of wings rather darker than in excisus, especially 

 before the first vein ; the first and second basal cells near the fourth 

 vein are lighter or with hyaline streaks ; otherwise scarcely at all 

 difierent. " Of the size of medium specimens, and the shape fully as 

 in excisus'''' (13-14"""), Loew. The specimens before me measure 



An additional female specimen from Georgia has the antenme and 

 proboscis nearly as in excisus, but its coloration and markings similar 

 to hulhirostris ; the process of the fifth abdominal segment, below, is 

 of extraordinary size. It measures but 9""". I believe it to be 

 distinct. 



Conops xanthopareus, n. sp. 



(5 ? . Face and cheeks yellow, with glistening dust near the or- 

 bits, extending narrowly upon the sides of the front. Facial gi-ooves 

 with a black spot on each side of the median prominence ; proboscis 

 reddish brown, black at the ends ; base much swollen, scai'cely once 

 and a half the length of the head. Antennae reddish brown, con- 

 siderably blackened at the end of the third joint ; first joint more 

 than half as long as second ; second and third of equal length ; 

 process of second joint of style small, but more projecting than in the 

 two preceding ; third joint modei-ately long, the attenuated portion 

 scarcely as long as its basal portion. Front and vertex yellow, 

 brownish above the base of the antennae. Occiput brown, its under 

 part pure yellow. Posterior orbits with borders of grayish yellow 

 dust. Thorax black, humeri and more or less of the scutellum red. 

 A spot on the inner side of each humerus, a small spot below ; broad 

 pleural stripes, distinctly limited above ; upper border of disk of 

 metanotum, extending broadly on its sides, golden or grayish yel- 

 low. Abdomen mostly black, sometimes quite reddish upon the 

 sides, especially of the second segment ; the four anterior segments 

 rather broadly bordered with golden or grayisli yellow, nearly the 

 whole upper surface of the fifth and sixth segments thickly dusted 

 with the same; process of tlie fiftli segment of the female rather 

 small below. Legs red, basal half of tibiae yellow. Coxa- and outer 

 distal part of anterior tibiae with silvery luster; tarsi brownish black, 

 last four joints, quite black. Wings brown in front, subhyaline be- 



