6(j Syrphidae. 



angle at the upper marginal cross-vein, and from Cnemodon by the 

 simple legs in the male and the frons without transverse depression 

 in the female; the male genitalia are rather large. It includes at 

 present three species, carhonm'ium Meig., morionellum Zett. and dubium 

 n. sp. Whether it will prove to be quite homogenous I dåre not say; 

 carbonarium and morionellum have short antennæ, dubium has them 

 longer, and the upper marginal cross-vein is a little different in all 

 three species; in carbonarium it is not much sloping outwards and 

 the upper angle less acute ; in dubium and morionellum it is about as 

 in Heringi. Moreover I only know the male of morionellum and there- 

 fore I cannot say whether the character of the wanting transverse 

 depression on the frons in the female will hold good; perhaps some 

 better characters may be found, and I think it probable that P. Heringi 

 Zett. and curvinervis Strobl should be placed in this genus. 



The developmental stages are not known. 



Of the genus as here accepted three species are known from the 

 palæarctic region, the new species described below included ; two 

 occur in Denmark. 



Table of Species. 



1. About 6 mm; chiefly black-haired ; antennæ short; wings 



brownish tinged 1. morionellum. 



— About 7,6 mm; more or less pale-haired, and at all events 

 abdomen pale-haired at the sides and on second segment ; 



antennæ longer; wings almost hyaline 2. dubium. 



1. P. morionellum Zett. 



1843. Zett. Dipt. Scand. II, 837, 15 et 1849. VIII, 3184, 15 (Pipiza). 



— 1885. Kow. Wien. ent.Zeitg. IV, 243 (Cnemodon). — 1907. Kat. palåarkt. 

 Dipt. III, 14 (Cnemodon). 



Male. Vertex black, black-haired ; frons and epistoma bluish black, 

 likewise black-haired, with a little pruinose line at the eye-margin 

 about in the middle. Occiput bluish black, greyish pruinose, black- 

 haired. Antennæ not quite short, third joint longer than broad, 

 blackish brown, a little paler at the base beneath ; arista shorter than 

 the antennæ, brown. Eyes densely dark brown-hairy. Thorax æneous 

 black, densely clothed with dark hairs, longest on scutellum. Pleura 

 black-haired. Abdomen black or æneous black with the margin and 

 the side elevations shining; it is clothed with short, dark hairs, longer 

 at the sides. Venter black, shining, with dark hairs, most dense to- 

 wards the end. Genitalia large and reaching rather long in under 

 the venter. Legs black, anterior knees indistinctly reddish, and middle 

 metatarsus a little reddish on the basal part. The legs are haired as 



