Genus Corethra. 
299 
Habitat. —Denmark (Staeger). 
Observations. —Redescribed from a male specimen in Mr. 
Yerrall’s collection. It is a very distinct species, easily identified 
by its dark colour. 
8. Corethra plumicornis. Fabricius (1792). 
C. lateralis. Latreille. 
C. Hafniensis. Gmelin. 
O. crystallina. De Geer. (?) 
(Ent. Syst. iv. 246, 58, Fabricius; Syst. Beschr. Dipt. i. 15, 1, Meigen; Ins. 
Lapp. 808, 1, Zetterstedt; Bull. Soc. Imp. Nat. Mosc. (1845), iii. 296, 1, 
Gimmerthal; Hist. Nat. Dipt. i. 47, 1, Macquart; Faun. Germ. 109, 16, 
Panzer; Klass. Zweif. i. 81, Meigen; Ins. Brit. Dipt. iii. 251, Walker; 
Fn. Austr. ii. Schiner; Gen. Crust, iv. 247 (= 0. lateralis ), Latreille; 
Syst. Ent. iv. 246, 58 ( Tipula 'plumicornis'), Fabricius; Ins. vi. 149, 20 
(= T. crystallina ), De Geer; Syst. Mat. v. 2826, 101 (= T. hafniensis ), 
Gmelin; Anim. sans Yerteb. iii. 444,7(= Tanypus lateralis ), Lamarck). 
Head deep testaceous; eyes black; rostrum dark brown, 
hairy, hairs long and dark ; palpi dark brown ; antennae pallid, 
with brown bands above the verticils. 
Thorax pale yellowish-brown, with two broad, dark, chestnut- 
brown median bands with a yellowish hue between, not quite 
reaching the scutellum, and one darker lateral line on each side 
of the mesonotum on its posterior half; these broad lines have a 
darker border and dark cross-bars in some specimens; thorax 
ornamented with long, curved, pallid hairs and bright brown 
bristles over the roots of the wings; scutellum bright testaceous, 
with a compound row of border-bristles, golden-brown in hue ; 
metanotum deep chestnut-brown, with a deeper mark in the 
middle, spreading out basally; pleurae pale yellowish. 
Abdomen pallid brown to pale yellowish grey, with a slightly 
darker narrow apical border and with bright deep brown hairs 
which are long laterally. 
Fig. 299. 
Corethra ‘plumicornis ( ? ). (X. 9.) 
Wings with a faint yellowish tinge, with yellowish veius and 
long hair-like dull yellowish scales; first sub-marginal cell 
