TETANOCERA. 107 



of the segment is covered with whitish pollen, which is much more 

 dense on the hind border, and makes it appear quite pale, whereas 

 on each side, near the lateral border, there is a vestige of a less 

 pollinose, dark spot. The exterior genitals of the male are yellow- 

 ish-brown. Legs almost blackish-brown, the intermediate ones, 

 as well as all knees, part of the hind femora, and a great part of 

 the hind tibia3, more yellow; anterior coxae yellowish, with a 

 whitish reflection ; first joint of the fore tarsi whitish ; the follow- 

 ing four black ; the intermediate tarsi have a rather pale brownish- 

 yellow ground color, rendered much darker by their short black 

 hairs, their two last joints appearing brownish on the upper side ; 

 the hind tarsi are like the intermediate ones, but have the three 

 last joints blackish. Wings grayish-hyaline, with the transverse 

 veins margined with blackish, the posterior transverse vein straight 

 and quite perpendicular. Besides the want of the foremost lateral 

 bristle on the front, this species is distinguished from the other 

 species of Sciomyza by its abdomen having the black hairs denser, 

 longer, and finer than those. 



Bab. Middle States. (Osten-Sacken.) 



4. S. luctifera Loew. % . (Translated from Beii. Entom. Zeitschr. 

 1861, p. 345, by Bar. 0. Sacken.) — Nigra, tliorace cinereo, facie alba, 

 antennis et fronte fulvis, coxis anticis albis, pedibus nigris, tarsis poste- 

 rioribus sordide albis, alis nigricantibus, margine costali nigro-limbato. 



Black, thorax cinereous, face white, antenna? and front fulvous, fore coxae 

 white, feet black, posterior tarsi of a dirty whitish, wings tinged with 

 blackish, costal border margined with black. Long. corp. 0.13. Long, 

 al. 0.1. 



Small, black. Face, cheeks, and the inferior part of the occi- 

 put, white. Antennae and front fulvous, lateral stripes of the 

 latter abbreviated anteriorly ; ocellar triangle and the upper part 

 of the occiput cinereous. Thorax dark cinereous, with black 

 hair. Fore legs black, their coxae white, with a silvery reflection; 

 posterior feet black, trochanters and tarsi dirty whitish, their apex 

 black. Wings of moderate size, tinged with blackish, with a 

 rather broad black margin near the costa. 



Bab. Pennsylvania. (Osten-Sacken.) 



Note. — In younger specimens, the black color of the intermediate pair 

 of feet is more or less brownish. 



