312 Oithorrhapha brachycera. 



Length 2,7 to about 3,5 mm. 



T. agilis is as common in Denmark as minuta ; Amager, Vester- 

 fælled, Charlottenlund, Lyngby Mose, Geel Skov, Tyvekrog, Nøddebo 

 and at Boserup near Roskilde; in Jutland at Nymindegab; my dates 

 are ^^h, — ^-^/t. It occurs in the same piaces as minuta, but it seems 

 to be an earlier occurring species. 



Geographical distribution: — Northern and middle Europe down 

 into Austria and Styria; tovvards the north to southern Sweden, and 

 here rare; and in Finland. 



22. T. lutea Meig. 



1804. Meig. Klass. der eur. zweifl. Ins. I, 238,7. — 1815. Fall. Dipt. 

 Suec. Empid. 10, 10. — 1822. Meig. Syst. Beschr. III, 89, 51. — 1842. 

 Zett. Dipt. Scand. I, 294, 26. — 1862. Schin. F. A. I, 91 [Plattj palpus). 

 — 1903. Kat. palåarkt. Dipt. II, 285. — Tachydromia pallida: 1822. Meig. 

 Syst. Beschr. III, 90, 53. — Tachydromia glabra: 1842. Zett. Dipt. Scand. 

 I, 295, 27. 



Male. Vertex and frons yellow, the latter sometimes greyish or 

 grey ; epistoma whitish yellow ; palpi small, yellow, and the proboscis 

 of the same colour. Occiput yellow, sometimes somewhat greyish, 

 with yellow bristles above, whitish hairs below. Antennæ yellow, the 

 third joint or the apical part of it brown ; it is short, not nmch longer 

 than broad and scarcely half as long as the arista. Thorax yellow, 

 shining; the disc is uniformly clothed with short, yellow hairs; a pair 

 of bare stripes indicate a division into dorsocentral and acrostichal 

 hairs; one long dorsocentral bristle and two notopleural bristles pre- 

 sent; all bristles yellow. Scutellum with two yellow marginal bristles, 

 and on each side a small hair. Pleura yellow, slightly greyish prulnose; 

 above the middle coxæ a shining space. Abdomen yellow, with 

 longish, pale yellow hairs. Venter yellow. The exterior genitalia 

 somewhat small. Legs quite yellow, the last tarsal joints generally a 

 little brownish; the three last joints on the front tarsi somewhat 

 dilated. The front femora very slightly, the middle femora somewhat 

 thickened; the middle tibiæ short, not much more than half as long 

 as the femora, the apical spine small. The legs are yellow haired. 

 Wings yellowish tinged. Veins brownish, yellow towards the base. 

 Halteres yellow. 



Female. Similar to the male; abdomen pointed and shorter 

 haired. 



Length 2,5—3,5 mm. 



T. lutea is not properly common in Denmark; Charlottenlund, 

 Ordrup Mose, Bøllemosen, Paiderhegn, Tisvilde; in Jutland at Rye 



