i82 EXTOMOLOGiCAL NEWS [May, 'i8 



Pcgonomyia aterrima V. d. Wulp. 



Van der Wulp, Biologia. Dipt., ii, 334, 1896. 

 Stein. Berl. Ent. Zeitsch., xiii, 169, 1897 (? alpicola). 

 $. (First see generic characters and table of species above.) 

 Wholly black, mostly subshining. Front only slightly protuberant be- 

 low, at the narrowest above about as wide as the distance between 

 the hind ocelli; orbits silvery, very narrow; about 12 pairs of erect 

 frontal bristles, beginning slightly below ocelli; second antennal joint 

 with three or four long erect hairs ; parafacial silvery, about as wide 

 as third antennal joint; transverse impression extending narrowly below 

 the eye, very distinctly set ofif from the shining, bushy-haired bucca, 

 which extends forward to form the side of the protuberant epistoma; 

 front edge of epistoma forms a sharp projecting rim; palpi of ordi- 

 nary size, with a few hairs ; proboscis rather slender, with ordinary 

 labella ; back of head flat above, bulging below, covered with bushy 

 hair. 



Thorax above with very thin brown pruinosit}^ almost shining, its 

 hairs erect and long, not very numerous, its bristles large ; post dc 3, 

 ant dc 2, inta 2, supa 2, posta 2, hum 3, inthum i, presut i, npl 2; stpl 

 I large behind and one more slender in front, together with several 

 irregular slender ones. Mesopleura hairy and bristly above a diagonal 

 line from the upper anterior to the lower posterior angle ; pteropleura 

 and metapleura bare. Scutellum with one marginal and one apical 

 pair of bristles, the latter close together. Calypters and their fringe 

 white. 



Abdomen moderately broad and flat, the two middle segments about 

 25^ times as wide as long ; hypopygium small, rounded, turned under, 

 both its segments subshining, the first with rather coarse, the second 

 with very fine hair; inner forceps (obere Zangen, D. & S.) short and 

 blunt, the outer (untere Zangen, D. & S., — homologous with the acces- 

 sory plates of Parker's and my Sarcophagid work) shining brown, 

 stout, not tapering, almost truncate at tip, straight, the hind edge 

 excised to fit against the inner forceps. Fifth sternite not much devel- 

 oped, with a shallow excision apically. 



Middle femur with a row of bristles on the whole length of the 

 front lower edge, smaller at tip where there are some larger above 

 them ; and on apical third of front lower edge a row of about 5, be- 

 ginning large and decreasing. Hind femur with an entire row of 

 long bristles below, another on the upper front edge, and one on the 

 hind side which dwindles toward tip. Front tibia with three setae on 

 outer hind edge : middle tibia with about eight on outer hind side, 

 three on inner hind side, one small or none on outer front side ; hind 

 tibia with a strong row on outer hind side, another on inner hind 

 side, four or five on outer front side (well outwardly), and usually 

 a few erect hairs on inner front side. Pulvilli grayish brown moder- 

 ately elongated, on the front feet only. 



