NORTH AMERICAN DIPTERA. 75 



antennae yellowish red, third joint reddish brown. Eyes convergent above, so 

 that the distance between the upper angles is scarcely more than half of that 

 between the lower angles. Thorax reddish brown, clothed on the dorsum in front 

 with very short black hairs, behind and on the scutellum with rather abundant 

 black hair and bristles. The very sparse pile of the pleuraj yellowish, the fan-like 

 row of bristles in front of the halteres black. Base of the abdomen reddish black, 

 becoming more reddish on the fourth and fifth segments; first segment wholly 

 black haired, except on the posterior angles where it is brownish pollinose and 

 yellowish haired ; third and fourth segments similar, but the black hair successively 

 less in extent and shorter, and the yellowish on the hind angles more extensive; 

 fifth segment with the hair quite short and chiefly yellowish; sixth segment 

 wholly with short yellow hair, the dust on the hind angles more whitish and the 

 remainder of the segment reddish, except in the middle in front where it is a 

 little blackish; seventh segment wholly white pollinose, except on the smooth 

 posterior margins (broader in their middle) where it is light yellow. Hypopyg- 

 ium red with yellow hair. Venter wholly opaque ochraceous with rather abun- 

 dant light yellow pile. Legs wholly yellowish red with black hair on the femora 

 and yellowish on tibifs, and rather short black bristles : the bristles on the under 

 side of the front femora quite short and spine-like. Wings hyaline, very dis- 

 tinctly tinged with yellow along the veins. Veins yellowish red. 

 JTah.—Yhridii, Carolina. One specimen, Florida (Frazar). 



Proctacanthus pliiladelphicus. 



Proctacanihus philadelphicHS Macquart, Dipt. Exot., 1, 2, 123, 7. 

 * ^ ^ _Leng;th 26-29 mm. Front narrowed above, scarcely half as wide as 

 the distance between the lower angles of the eyes. Face in profile moderately 

 concave below the antennre, not abruptly convex below the concavity, clothed 

 with rather weak light yellow bristles, along the oral margin black ; densely light 

 yellowish pollinose. Antennte black, the basal joints with short black and yellow 

 hair; front with a few short black bristles on the ocelli; beard light yellowish 

 white; occipito-orbital bristles in part black. Thorax reddish brown, opaque, 

 dorsum in front clothed with short black hairs, behind and on the scutellum with 

 moderately strong black bristles, the fan-like row of bristles in front of the hal- 

 teres black. Abdomen black, not very broad at the base in the male, clothed with 

 dense grayish ochraceous pollen, on the seventh segment more whitish, the ter- 

 minal segments in the female shining black ; on the sides of the second segment 

 with numerous rather long black bristles ; on the sides of the third with fewer and 

 shorter ones, the strongest ones extending in a row inwards immediately in front 

 of the smooth hind border; on the remaining segments fewer and shorter, and 

 mostly confined to the row, as in the third ; the hair is short, sparse, recumbent 

 and yellowish white; hypopygium red with yellowish hair. Venter brownish 

 red with short and abundant black and light colored pile. Front and middle 

 coxffi with long hair in front like the beard. Legs red, the femora above in large 

 part black ; hair throughout yellowish white, the bristles black, on the under side 

 of the front femora moderately long. Wing distinctly tinged with yellowish 

 along the veins, the veins red. 



Mab. — New England. 



The ground color of the abdomen when wetted is distinctly red across 

 the middle of the anterior segments, and the posterior segments wholly 

 so ; this explains Macquart's description. 



