54 Pipunculidae. 



a little darkened; the femora are not very dull, especially somewhat 

 shining behind; the legs haired as iisiial, only middle femora with a 

 double row of very small spinules below the apical half. Wings a little 

 brownish tinged, stigma absent, third costal segment not short, more 

 than one third of the fourth, and this latter considerably shorter 

 than the fifth, medial cross-vein at about the end of the first fourth 

 of the discai cell. Halteres yellow. 



Female. I do not know the female; according to Becker the frons 

 is as usual ; thorax somewhat pruinose in front ; abdomen with reddish 

 yellow spots on the sides of third and fourth segment. Hypopygium 

 yellow, long ellipsoidal, ovipositor as long as the basal part, straight, 

 thick at the base. 



Length about 4 mm. 



This species is similar to maculatiis, but distinguished by the much 

 larger male hypopygium and the quite yellow female hypopygium, 

 and in both sexes by the black humeral knob, besides by other char- 

 acters. I think it is beyond doubt that my specimen belongs to this 

 species, the only difference being, that also the posterior femora have 

 a quite small dark spot like the front femora. It is also similar to 

 xanthopus, and it is perhaps not quite impossible, that it might be a 

 variety of this species with the rings on femora reduced to nearly 

 disappearance, but it seems to have a rather larger hypopygium; 

 with xanthopiis the yellow spots on the female abdomen and the 

 yellow female hypopygium would agree. 



P. semimaculatus (if correct) is rare in Denmark, we have only 

 one specimen, a female, taken at Horsens (H. J. Hansen). 



Geographical distribution: — Northern and middle Europe down 

 into Germany, towards the north to Lappland. 



23. P. littoralis Beck. 



1897. Beck. Berl. Entom. Zeitschr. XLII, 86, 44. - 1900. Beck. ibid. 

 XLV, 239, 44, p. p. S- - 1901. Verr. Brit. Flies VIII, 122, 26, fig. 116. - 

 1920. Collin, Ent. Month. Mag. LVI, 272, 1. — Dorylas minimus p. p. 1910. 

 Kertész, Cat. Dipt. VII, 377. — 1921. Beck. Wien. Ent. Zeitg. XXXVIII, 

 160, S. 



Male. Eyes touching, but only for a very short space; vertex 

 black, shining, frons and epistoma greyish or silvery white. Occiput 

 grey, a little brownish above. Antennæ with the third joint brownish 

 yellow, whitish pruinose, somewhat long rostrate. Thorax dark greyish 



