Ptychoneura. 235 



somewhat strong or qiiite fine and short. Epistoma rather retreating; 

 the vibrissal ridges somewhat converging below; a large vibrissa 

 present. Proboscis short; palpi thread-Hke. Antennæ inserted above 

 middle of the eye, third joint three to five times as long as second; 

 arista short, thickened to near end, sHghtly pubescent, nearly bare. 

 Thorax rectangular; three postsutural dorsocentrals; no achrostichals 

 or a præscutellar pair or also a præsutural pair. Scutellum with three 

 marginal bristles on each side. Two to four sternopleural bristles, but 

 only two strong. Pteropleura with a bunch of small bristles above. 

 Abdomen conical or elongated conical, with excavation on second 

 segment not reaching hind margin ; it is without or with only indistinct 

 bristles at hind margins. Legs short, somewhat robust with femora 

 a httle thickened; claws and pulvilli equal in both sexes. Wings with 

 first posterigr cell open, ending near apex of wing; discai angle rect- 

 angular or about, with an indication of a veinlet; no costal spine. 

 Of the genus four European species are recorded, the two occur- 

 ring in Denmark. 



Table of Species. 



1. Legs with the tarsi reddish; vibrissæ somewhat strong. . . L rufitarsis. 

 — Legs quite black; vibrissæ short and fine 2. cylindrica. 



1. P. rufitarsis Meig. 



1824. Meig. Syst. Beschr. IV, 410, 296 {Tachina). — 1889. B. B. Denkschr. 

 Akad. Wiss. Wien, LVI, 104, Tab. V, Fig. 96 et 1893. LX, 224. — 1907. Kat. 

 palåarkt. Dipt. III, 378. — 1924. Stein, Arch. f. Naturgesch. 90, 6, 126, 3. — 

 Tachina ruhritarsis Zett. 1859. Dipt. Scand. XIII, 6078, 19—21. — T. flavi- 

 tarsella Zett. 1859. 1. c. XIII, 6079, 19—22. 



Of'this species I have seen only the female. Frons about as 

 broad as the eye, a little protruding. Orbits yellowish grey, cheeks 

 and jowls silvery; frontal stripe greyish brown to black, seen from 

 in front yellowish grey pruinose. Frontal bristles few in number. 

 Vibrissæ ascending to near the upper end, somewhat strong. Orbits 

 with some few black hairs, also present on just the upper part of the 

 cheeks; jowls with hairs only behind. Occiput blackish, grey along 

 the eye-margin, with black hairs. Antennæ black, long, third joint 

 five times as long as second; arista thickened to near apex, quite 

 shghtly pubescent. Palpi blackish brown, yellow at apex. Thorax 

 greyish white pruinose, with four black stripes, the median abbre- 

 viated behind, the lateral broad, divided at the suture into spots; 



