Pipunculus. 



51 



ring near the base, broadest above, last tarsal joint more or less 

 darkened; the femora not shining; the legs haired as usual, only 

 middle femora with a double row of small 

 spinules below the apical half. Wings very 

 slightly tinged, stigma absent, third costal 

 segment not much more tlian one quarter of 

 the foiirth, middle cross-vein at about the first 

 fourth of the discai cell. Halteres yellow. 



Female. Similar to the male; frons 

 black and shining above, white below above 

 the antennæ; abdomen sometimes quite black, 

 but often more or less yellow at the sides of 

 third and fourth segment, and sometimes 

 these segments yellow with only a black 

 dorsal spot; venter mainly yellow. Hypopy- 

 gium somewhat large, especially long, all 

 yellow, ovipositor distinctly shorter than the 

 basal part, rather thick at the base. Legs 

 with the black ring on femora very small or 

 nearly wanting. Claws and pulvilli enlarged. 



Length 3,2 — ^3,5 mm. 



P. xanthopiis I have only from two localities. Dyrehaven ^Ve 

 1884 (H. J. Hansen) a single male, and Ruderhegn, and all the spec- 

 imens from this latter locality are bred; the pupæ were taken some- 



Fig. 24. Antenna of 

 P. xanthopus (^ X 115. 



Fig. 26. Wing of P. xanthopus $. 



what numerously in flood refuse at the border of a pond in April 

 1890 (Schlick) and on ^Vs 1910, V2 1913 and ^^4 1914 (Kryger), the 

 imagines emerged on ^U — ^U. 



Geographical distribution: — Northern and middle Europe 

 down into Hungaria, towards the north to southern Sweden. 



Remarks: There can be no doubt that the species is xanthopus, 

 as it in every respect is quite agreeing; the yellow sides of third and 



4* 



