Pales. 355 



discai bristles, Three sternopleiiral bristles, Pteropleura with a biindle 

 of hairs and a bristle above, Abdomen ovate, excavation on second 

 segment reaching hind margin ; there are discai and marginal bristles, 

 second segment with a pair of marginal, Genitalia small, bent in 

 under venter. Legs with an anterodorsal row on hind tibiæ of smallish, 

 rather equal bristles, with one or two longer bristles; claws and 

 pulvilli in male elongated; front tarsi in female simple. Wings with 

 first posterior cell narrowly open, ending somewhat before apex of 

 wing; discai angle rectangular; no costal spine. 



The species are parasitic on Heterocera, pavida also on Allantus 

 cingillum^ and it belongs to Pantel's group 2. 



Of the genus 4 palæarctic (2 European) species are recorded; 

 one occurs in Denmark. 



1. P. pavida Meig, 



1824. Meig. Syst, Beschr. IV, 398, 279 (Tachina) et 1838. VII, 261, 12 

 (Phorocera). — 1862. Schin. F. A. I, 492 (Phorocera). — 1900. Villen, Bull. Soc. 

 Ent. de Fr. 161, 1 (Phorocera). — 1907. Kat, palåarkt. Dipt. III, 312. — 1921. 

 Baer, Zeitschr. f. angew. Ent. VII, 349. — 1924. Stein, Arch. f. Naturgesch. 

 90, 6, 108, 1. — Phorocera aestuans Meig. 1838. 1. c. VII, 261, 10. — 1900. 

 Villen. 1. c. 161, 6. — Phorocera cilipeda Eond. 1859. Dipt. Ital. Prodr. III, 

 167, 7. — 1862. Schin. F. A. I, 492. — 1889. B. B. Denkschr. Akad. Wiss. Wien, 

 LVI, 93, Tab. II, Fig. 40 et 1891. LVIII, 338. — Zenillia pumicata (Macq. nec 

 Meig.) Pand. 1895. Kev. Entom. XIV, 337, 7. — 1907. Villen. Ann. Soc. Ent. 

 de Fr. LXXVI, 384. 



Male. Frons above a little narrower than the eye, widening 

 downwards, Orbits greyish; cheeks silvery; jowls grey; frontal stripe 

 velvet blackish brown, Orbits and jowls with black hairs, Occiput 

 grey, with somewhat sparse pale hairs and rows of black hairs behind 

 postocular bristles, Eyes densely pale-haired, Antennæ black, second 

 joint short, third about five times as long; arista a little thickened in 

 nearly basal half, Palpi blackish, a little dilated outwards, Thorax 

 bluish black, shining, quite thinly greyish pruinose; with four black, 

 only slightly visible stripes, the two median narrow, distant, ab- 

 breviated behind, the lateral divided at the suture into two elongated 

 spots; scutellum with the margin reddish, Thorax with short, dense 

 black hairs, Abdomen bluish black, shining, with a small, more or 

 less distinct, reddish side spot on third segment; it is thinly bluish 

 grey pruinose on the three last segments, with very narrow black 

 hind margins visible, Abdomen has dense short hairs, and discai and 

 marginal bristles, on second segment a pair of marginal, on third a 



23* 



