506 GNATS OR MOSQUITOES — CHAPTER XV 



Legs yellow, either spotless, or with the apices of the femora, tibicT?, and 

 tarsal joints fuscous. Length. — 3 lines. 

 Hah i ta t. — Lapland. 



11. CORETHRA OBSCURIPES, Van der Wulp. 



Wings unspotted (?). Leg uniformly (?) dusky. Antennai 

 unhanded (like Cor. rufa). Of a generally more dusky tint than 

 the neighbouring species. 



Description from Van der Wulp, '* Dipt. Neerlandica," i, p. <i3o 

 (1877). — Like Cor. rufa, Zett., but of a darker colour. Thorax ash-grey 

 with dark brown bands ; the lateral band between the neck and the root 

 of the wing narrow and light grey ; scutellum brownish. Abdomen 

 dark brown, with glossy gi-eyish incisions. Legs brownish -grey, the 

 coxae and bases of the femora yellowish : hairs on the ventral aspect 

 brown ; halteres yellow. Wings of a grey tint, with light brown veins. 



Cor. culicifor)niii differs from this species in having the hairs of the 

 abdomen yellow, while Cor. ftisca has the scuteUum and legs alike 

 yellowish. 



Habitat. — Holland. 



12. CORETHRA FUSCA, Stajger. 



Wings unspotted (?). Legs without bands, or spots ('?). 

 Antennic unhanded (?). (Said to resemble Cor. cidiciformis.) 

 Generally dusky- black. 



Stseger's heading shows he is doubtful whether this be a new species, 

 or identical witli Cor. cuUciformis. 



Description from Staeger, " Naturh. Tidsskr." (Kroyer), Bd. ii, p. 

 556 (1839). — Fuscous black ; the thorax behind with a latex'al line and 

 the scutellum pale ; antennas with black hairs. Distinguished from Cor. 

 plumicornis by its smaller size. Body dark brown with stiff hairs ; 

 borders of the abdominal segments whitish. Legs dirty yellow. Length. 

 — 2i lines. 



Ha hita t. — Denmark. 



13. CORETHRA ASIATICA, Giles. 



Journ. Bombay Nat. Hist. Soc. xiii, p. 610. 



Wings unspotted; tarsi unhanded, generally pale straw 

 coloured. The thorax with an indistinct darker median patch 

 in front and a pair of lateral ones behind. Antennte without 

 obvious banding. 



