Pipunculus. 49 



and tarsi pale yellow with the apical joint black; femora dull; the 

 legs sliort-haired, femora nearly mide, middle femora with a double 

 row of very small spinules below in about the whole length. Wings 

 slightly tinged, stigma absent, third costal segment about one third 

 of the fourth, middle cross-vein near the end of the first third of the 

 discai cell. Halteres yellow. 



Female. Quite similar; frons black and shining, white above the 

 antennæ. Hypopygium curious, it is yellow, the basal part is" large 

 and flattened, almost disciform, with a roundish impression in the 

 middle, ovipositor short, thick at the base. Claws and pulvilli some- 

 what enlarged. 



Length about 3,5 mm. 



P. haemorrhoidalis is rare in Denmark, Charlottenlund (Stæger), 

 Ørholm (the author). Ruderhegn (Schlick, Kryger); the dates are 

 in the first part of June; pupæ were taken in Ruderhegn in flood 

 refuse on V2 and '^^U, the imagines emerged on ^"/s and ^U respectively 

 (Schlick, Kryger). I have studied Zetterstedt's types of albitarsis and 

 haemorrhoidalis and found them identical with male and female 

 respectively of the present species. 



Geographical distribution: — Northern and middle Europe down 

 into Styria, towards the north to northern Sweden. 



19. P. xanthocerus Kow. 



1887. Kow. Wien. Ent. Zeitg. VI, 153, 17. — 1894. Strobl, Mittheil. 

 Nat. Ver. Steierm. XXX, 10. — 1897. Beck. Berl. Entom. Zeitschr. XLII, 

 89, 47, Taf. II, Fig. 14 et 1900. XLV, 240, 47 et 1921. Wien. Ent. Zeitg. 

 XXXVIII, 162, 163. - 1910. Kertész, Cat. Dipt. VII, 384 {Dorylas). 



Male. Eyes not touching, frons black and shining above, whitish 

 below like the epistoma. Occiput grey, blackish above. Antennæ with 

 the third joint yellow, whitish pruinose, very long rostrate. Thorax 

 black, shining, very slightly pruinose, humeral knob of the same 

 colour; the disc sparingly with fine hairs only as dorsocentral rows 

 and behind the humeri; at the margin of scutellum the hairs slightly 

 longer. Pleura and postscutellum greyish. Abdomen black, shining, 

 the incisures very narrowly white; it is a little grey pruinose from 

 very short pubescence and with sparse fme, longer hairs, first segment 

 grey; at the sides of first segment a rather conspicuous fan of long 

 yellow hairs. Hypopygium black, of medium size, with a somewhat 

 large, nearly triangular apical impression. Legs yellow, femora with 

 a broad black ring on the middle and generally the last tarsal joint 



4 



