GENUS COKETHRA 505 



luesonotum ; scutelluui pale ochreous, with a compound border of 

 golden-brown bristles ; metanotum chestnut-brown, with darker centre ; 

 pleurte pale ochi'eous. Abdomen pale yellowish to testaceous-brown, 

 with long golden hairs, posterior borders of the segments with a narrow 

 dark rim. Legs ochreous, with dark hairs, slightly dusky on the tarsi ; 

 ungues equal, small, and brown in the ? . Wings with a yellowish tinge, 

 with dull yellowish hair-like scales and j-ellow veins. Length. — About 

 4*5 mm. 



Habitat. — Europe generally. 



9. CORETHRA FLAYICANS, Meigen (" S. B." p. 248). 



Wings unspotted. Legs unhanded. Antennee black, un- 

 handed. Generally pale yellow. 



There is a specimen labelled with this name by Meigen, in the Jardin 

 des Plantes. Though not so colourless as Cor. pallida, it is of a very 

 pale yellow tint throughout, except the ej'es, antennie, proboscis and 

 palpi, which are all black. The thorax is glabrous, mainly chestnut- 

 brown, with a fine median white line and two large, round, lateral snowy 

 spots. The abdomen is of a pale ferruginous colour, the fore borders of 

 the segments being rather darker. Legs pale ferruginous, without any 

 markings. Wings pale iridescent yellowish, the veins of the same 

 colour. Both the first sub-marginal and the second posterior cells are 

 long and narrow, the former being a trifle the longer ; the bases of the 

 cells are nearly opposite, their stems short and of nearly equal length. 

 About the same size as C. Pallida. 



Description from Meig. " S. B." p. 243. Yellow, with the sides of 

 the thorax whitish ; clear yellow, almost sulphur-yellow on the hairs of 

 the antennae and the legs. The thorax is whitish at the sides. Lenffth. 

 — S, 2i lines. 



Habitat. — The specimen in question is from Germany. 



10. CORETHRA RUFA, Zettevstedt. 



Wings unspotted (?). Legs sometimes with the joints apically 

 banded. Antennae unhanded (?). Of a generally rufous colour 

 with bright brown marks on the thorax. 



Description from Zetterstedt, " Insec. Lapponica," 808. — Eufous 

 with obscure brown marks on the thorax, dorsum of the abdomen 

 fuscous, the legs yellow. ? , like Cor. 'jplumicornis, F., but differently 

 coloured, bemg entirely fuscous testaceous. Antennae often pale. 

 Thorax with a double median stripe, and an ovate spot on either side, 

 of bright brown. Abdomen pubescent, fuscous above, with a median 

 testaceous line at the base, sometimes extending beyond the middle ; 

 venter pale. Wings pale, with markedly villous veins ; halteres pale. 



