1 90 AN A ceo UNT OF BRITISH FLIES. 



pale brownish — pale towards the base. Abdomen blackish, clothed 

 with long, soft, pale hairs ; first joint of fore tarsus about as long as 

 the tibiffi. ?, antennae 7-jointed, dusky first joint, thick, ferrugi- 

 nous ; last longer than the three preceding together. Thorax fer- 

 ruginous, with three confluent bands on the mesonotum ; scutellum 

 rather pitchy-reddish ; mesonotum and mesosternum pale slaty- 

 gray. Wings broader than in the $, veins more evident, dusky 

 ferruginous. Abdomen above, dark gray, except the incisures or (in 

 immature specimens) only an interrupted dusky line down the back; 

 first joint of fore tarsus shorter than the tibia." Haliday MSS. 

 Length, 2 lin. Found by Haliday in Ireland. 



D. Typhon, Hal. 



Female : " Very like the preceding species ; the antennae 7-jointed. 

 Pale-yellowish. Vertex, three confluent stripes on the mesonotum, 

 metanotum and mesosternum, cinereous (scutellum paler). Antennae 

 fuscous; first joint ferruginous; seventh elliptical, as long as the 

 three preceding or more. Wings white hyaline ; usual veins fus- 

 cous, yellowish towards the base ; pobrachial areolet closed beyond 

 the fork of the pobrachial vein. Abdomen above cinereous, with 

 pale incisures ; coxce ferruginous, outwardly cinereous. Fore-legs 

 dusky ; femora at the base and coxje pale-yellowish ; posterior 

 femora and tibi« ferruginous, with dusky tips ; fourth joint of the 

 tarsi short, obcordate, notched at the tip ; first joint of the fore 

 tarsi very little shorter than the tibia." Ibid. Length, 2 lin. Found 

 by Haliday in Ireland. 



D. tons Its, Hal. 



The smallest of this genus, the length being from i to i^ lin. It 

 resembles D. aiiiinon., but the antennae are different, and the wings 

 are not white. Antennae dingy yellow, half the length of thorax ; 

 last joint elongate elliptical, not one-fourth of the length of the 

 antennte ; second and next joints sub-globose, then gradually in- 

 creasing in length, and becoming oblong, scantily verticillate, with 

 very long hairs, not forming a plume as usual. Pobrachial areolet 

 scarcely passing the fork of the pobrachial vein. Abdomen dusky, 

 with pale band on each segment ; slightly hairy. Legs longer than in 

 amnion. Found (by Haliday) in Ireland, and one near London. 



D. fiofata (Staeg.) is also said to be British. 



Genus. — Tanypus, ISIg. 

 This genus is better known than any of the preceding, except 

 Chironomus. The Tanypi ^xt very similar to the Chironomi in their 



