Dolichopodidae. 157 



ders of lakes, running, flying and chasing near the water, generally 

 in great numbers; it occurs also at sea-coasts in the same way. 



Geographical distribution: — Northern and middle Europe, down 

 into Germany; towards the north to northern Sweden, and in Finland. 



2. T. notatus Stann. 



1831. Stann, Isis 1831,269, 2. (Ammmobates). — lSi^± Stæg. Krøyer's 

 Tidsskr. IV, 10,2. {Ammohates). — 1843, Zett. Dipt. Scand. II, 621,108, et 

 1849. VIII, 3100, 108, et 1852. XI, 4299, 108 (DoUchopus). — 1862. 

 Schin. F. A. I, 204. — 1903. Kat. palaarkt. Dipt. II, 307. — DoUchopus 

 litoreus Hal. 1833. Entom. Mag. I, 164. 



Male. Vertex and frons light brown or æneous. Epistoma silver- 

 white, sometimes slightly yellowish below the antennæ. Palpi blackish. 

 Occiput brown or æneous; postocular bristles whitish below, black 

 above. Antennæ short, shorter than the head, third joint about as 

 long as broad, rounded at the apex; they are black, the two basal 

 joints yellow, more or less darkened above. Thorax somewhat olive 

 or dull æneous, distinctly bright brownish pruinose, almost not 

 shining, or only behind ; there are two indistinct middle stripes in 

 front; scutellum æneous, palest in the middle; sometimes thorax is 

 lighter, almost yellowish pruinose, and only anteriorly, while there 

 are some small, light spots towards behind on each side, between 

 the dorsocentral bristles, Pleura æneous, greyish pruinose; propleura 

 with black hairs and a black prothoracic bristle. Abdomen greenish 

 or æneous, with coppery reflexes on the hind part of the segments, 

 and with distinct, dark hindmargins to the segments; it is greyish 

 white pruinose on the front part of the segments; with the light 

 from behind it is quite pruinose with a dark middle line and hind 

 margins; it is clothed with short, black hairs, and has longish hind- 

 marginal bristles, a little longer on the first segment. Hypopygium 

 black, greyish pruinose, very slightly longitudinally striated posteriorly, 

 and with the lower margin here shining; the eighth segment with 

 black hairs ; there are slightly projecting posterior ventral lobes ending 

 with a thin style, bearing a hair at the apex and one more forwards; 

 there are no projecting middle lobes, and this part of the hypopygium 

 is more symmetricai than in ammohates; penis and its sheath are 

 long, reaching to the end of the hypopygium, and penis has a small 

 hook behind the apex on the dorsal side ; the inner lamellæ are lying 

 close together, blackish, hairy at the apex; the outer lamellæ are short, 

 somewhat triangular, equilateral; they are blackish or dark brown, 

 with long hairs at the ventral margin, shorter at the rounded apex. 

 Legs less long and slender than in ammohates, the middle femora 



