Empididae. 247 



1. Ch. melanocephala Fabr. 



1794. Fabr. Ent. Syst. IV, 407, 21 (Empis), et 1805. Syst. Antl. 144,8 

 {Tachydromia). — 1842. Zett. Dipt. Scand. I, 269, 1 {Phyllodromia). — 

 1903. Kat. palåarkt. Dipt. II, 271. 



Male. Vertex and frons grey, the ocellar triangle blackish; epis- 

 toma white; palpi yellow. Occiput grey, with whitish hairs. Antennæ 

 yellow, the third joint and the arista black. Thorax yellow, distinctly 

 greyish pruinose; the margin of the disc with a narrow, dark or 

 blackish line, stretching from one wing-root anteriorly round to the 

 other; sometimes a dark? median, posteriorly narrowed line is present. 

 There are four long, yellow dorsocentral bristles, two in each row. 

 Further a notopleural and a supraalar bristle, both yellow. Scutellum 

 with two, yellow marginal bristles. Pleura yellow. Abdomen blackish 

 or brownish above, with short, yellow hairs. Venter yellow. The 

 large genitalia and the two last abdominal segments yellow, the 

 genitalia somewhat dark above. Legs yellow, a stripe on the posterior 

 side of the front femora, and the tip of the tarsi blackish or brown. 

 The legs with short, yellowish hairs, the front femora with two rows 

 of long, black or dark brown bristles below. Wings hyaline, slightly 

 yellowish. Veins brownish. No stigma. Halteres yellow. 



Female. Similar to the male, but the front femora without any 

 dark stripe. Ovipositor thin. 



Length 2,2 — 2,5 mm. 



Ch. melanocephala is not rare in Denmark; vicinity of Copenhagen, 

 Charlottenlund, Ruderhegn, Nordskoven at Jægerspris; on Lolland at 

 Maribo, and on Langeland at Lohals ; in Jutland at Laven near Silke- 

 borg, Hald near Viborg and at Sæby, and fmally on Bornholm at 

 Almindingen, The dates are ^^/e — ^^Is. It occurs in woods on humid 

 and shaded piaces, on bushes and in low herbage and grass; at Hald 

 I took it in somewhat large numbers in the wood on Vaccinium 

 growing below oak-trees. 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to northern Scandinavia, and in 

 Finland. 



19. PKyllodFomia Zett. 



Species of small size and yellow or grey colour. Head somewhat 

 elongated and slightly flattened, a little broader than thorax. Occiput 

 somewhat arched, with a few bristles above. Eyes somewhat large 

 and elongated; they are separated in both sexes, below the antennæ 

 only narrowly separated; the facets are of equal size; the incision in 

 the inner eye-margin very small. The vertex has a tubercle with 



