112 LIST OF DIPTERA. 



Simulium nigrum, Meig. Dipt, i. 297, 12, vi. 310. Atractocera ni- 

 gra, Meig. Klass. Zweif. i. 96, 6. 

 a. England. From Mr. Walker's collection, 

 fri Lapland. From Mr. Walker's collection. 



Simulium rufipes, Meig. Dipt. vi. 311, 15. 

 a. England. 



Simulium cinctum, Meig. Dipt. vi. 311, 14. 



a. England. 



b. France. 



Simulium sericatum, Meig. Dipt. vi. 310, 13. 

 a. England. 



Simulium pusillum, Zett. Ins. Lapp. 803, 5. 



a. Alten, Finmark. From Mr. Walker's collection. 



Simulium decorum, n. s. Cinereum, argenteo micans, antennis piceis, 

 pedibus fulvis, femoribus tibiisque piceo fasciatis, tibiis posticis 

 tarsisque posterioribus basi albis, alis limpidis. . 



Body gray, adorned with white silky lustre, especially on the 

 sides of the chest and on the breast : feelers piceous : legs tawny ; 

 thighs and shanks with irregular piceous hands ; feet piceous ; fore 

 thighs adorned with white lustre ; hind shanks and four hinder feet 

 white at the base : wings colourless ; fore border veins pale tawny ; 

 the other veins still paler and very indistinct ; poisers pale yellow. 

 Length of the body \\ line ; of the wings 3j lines. 



a. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



Simulium invenustum, n. s., mas. Nigrum, cinereo suffusum, abdo- 

 mine basi fulvo hirto, antennis piceis, pedibus fulvis, alis lim- 

 pidis. Fern. — Cinereum, antennis nigris, pedibus rufo-cinereis, 

 tarsis nigris. 



Body black, overspread with a grayish bloom : base of the ab- 

 domen clothed with tawny hairs : feelers piceous: legs tawny, and 

 clothed with tawny hairs : wings colourless ; fore border veins brown ; 

 the other veins tawny and slender ; poisers piceous. Fern. — Body 

 gray : feelers black : legs reddish gray ; feet black. Length of the 

 body 1^ line ; of the wings 3| lines. 



a. St. Martin's Falls, Albany River, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



