50 Pipunculidae. 



darkened; femora not shining; the legs haired as usual, hind tibiæ 

 with one or two long yellow hairs in the middle on the posterior side; 

 only middle femora with two rows of quite small spinules 

 below the apical half. Wings somewhat brownish tinged, 

 stigma absent, third costal segment scarcely one quarter 

 of the fourth, middle cross-vein at about the first fourth 

 of the discai cell. Halteres yellow. 



Female. Quite similar; frons narrow, bla.ck and 

 shining above, white below above the antennæ; hypo- 

 pygium somewhat small, the basal part ovate, black and 

 shining, the reddish ovipositor straight, scarcely as long 

 as the basal part. 



Length about 4 mm. 



P. xanthoceras seems to be very rare in Denmark, 



only one specimen, a female, has been taken at Lohals 



^^/t 1913 (the author). As I do not know the male the above 



, ■ p description is partly taken from Kowarz. 



xanthocerus Geographical distribution: — Europe down into 



? X 90. Italy, it does not seem to be known north of Denmark. 



20. P. xanthopus Thoms. 



1869. Thoms. Opusc. Entom. II, 111, 5. — 1897. Beck. Berl. Entom. 

 Zeitschr. XLII, 90, 50 et 1900. XLV, 240, 50 et 1921. Wien. Ent. Zeitg. 

 XXXVIII, 162, 163. - 1901. Verr. Brit. Flies VIII, 117, 23, fig. 113. - 1910. 

 Kertész, Cat. Dipt. VII, 384 {Dorylas). 



Male. Eyes not touching, frons very narrow above the middle, 

 black and shining, white above the antennæ and epistoma white. 

 Occiput grey, black in the upper half. Antennæ with the third joint 

 brown or yellowish, pointed but not exactly rostrate. Thorax black, 

 slightly brownish pruinose, somewhat shining; humeral knob of the 

 same colour; the disc very sparingly with fine hairs, present only 

 as dorsocentral rows and behind the humeri, at the margin of scutel- 

 lum the hairs a little longer. Pleura and postscutellum greyish. Ab- 

 domen black, shining, the incisures very narrowly white; it has a 

 very short greyish pubescence and very sparse longer fine hairs, 

 first segment grey and with a conspicuous fan of longer yellow hairs 

 at the sides. Hypopygium somewhat large, subconical, a little pruinose, 

 with a small roundish apical impression, it is somewhat hairy at the 

 apex; the end claws reddish. Legs yellow, femora with a small black 



