Dolichopodidae. 337 



angulary lobe and a well developed inner part, the fringes of both of 

 almost the same length. 



The developmeiital stages are not known, 



The species of Scellus are rather characteristic files; they seem 

 to be somewhat dififerent with regard to occurrence; they may be 

 found on commons at the shore in grass and low herbage at water 

 pools, but also quite inland and on dry fields, as remarked under 

 notatus. Aldrich says with regard to the American species (Entom. 

 News, 1907, 133) that they are never seen at water, but are found 

 on bark of trees, on the ground, or in grass, and he adds, "(exceptio- 

 nally perhaps on stones)". This does not hold good with regard to 

 the European species, at all events not as far as concerns notatus^ 

 and Zetterstedt says about spinimanus "in pratis humidis", and also 

 gallicanus Beck. is by the author recorded to occur: "am Rande 

 mooriger Stellen". It is however rather curious that 1 have taken 

 notatus in so very different localities, and it seems to show that they 

 are not bound to humid piaces. 



Of the genus 4 species are known from the palæarctic region ; 

 one occurs in Denmark. 



1. S. notatus Fabr. 



1781. Fabr. Spec. Ins. II, 448, 65 {Musca), et 1805. Syst. Antl. 269, 

 10 {Dolichopus). — 1824. Meig. Syst. Beschr. IV, 62,6, Tab. XXXV, Fig. 15 

 (Medeterus). — 1843. Zett. Dipt. Scand. II, 446, 6 (Hydrophorus). — 

 1862. Schin. F. A. I, 230 (Hydrophorus). — 1903. Kat. palaarkt. Dipt. II, 

 341. — Hydrophorus armiger Fall. 1823. Dipt. Suec. Dol. 4,5. — Musca 

 ungulata Linn. 1761. Fn. Suec. Ed. II, 457, 1858, p. p. 



Male. Vertex and frons æneous, but densely grey pruinose. Epi- 

 stoma somewhat narrow, brown, just below the antennæ greyish. 

 Palpi brownish pruinose. Occiput greenish, densely grey pruinose; 

 postocular bristles black, the hairs on the lower part of occiput red- 



Fig. 104. Antenna of S. notatus c?. X 65. 



dish. Antennæ not quite as long as the head, black, somewhat greyish ; 

 the first joint almost as long as the two others, the third oval, 

 slightly notched in the lower margin; arista slightly longer than the 

 antennæ. Thorax dark metallic, æneous or coppery, almost purplish, 

 at the sides generally somewhat greenish; in the middle there is a 



22 



