LIST OF DIPTERA. 1119 



Chlorops annulata, Bamstoris MSS. Flava, verticis macula pi- 

 cea, peristomate nigro bimaculato, thoracis viiiis tribus nigris 

 subcinereis, pectore maculis quatuor piceis ornato, abdominis 

 disco piceo segmenlorum marginibus posticis flavis, antennis 

 ferrugineis, palpis pedibusque fulvis, alis limpidis. 



Body yellow : crown adorned by a large triangular pitchy, spot, 

 which, with the exception of the hind border, is interrupted by two 

 slender yellow streaks : eyes pitchy : sucker ferruginous : palpi 

 tawny : a black spot on each side of the fore border of the peristoma : 

 feelers ferruginous, nearly as long as the face, pitchy above and at 

 the tips ; third joint nearly round, much deeper than the second and 

 more than twice its length : disk of the chest black, the three usual 

 stripes being so broad as to leave no space between them, with the 

 exception of two yellow spots in front : two large shining nearly 

 triangular pitchy spots on each side of the breast : abdomen oval, 

 very little longer than the chest, tawny along each side, pitchy 

 above, with the exception of the hind borders of the segments: legs 

 dark tawny ; knees and tips of the shanks paler ; claws black ; wings 

 colourless ; wing-ribs tawny ; veins black ; longitudinal veins 

 straight ; lower cross-vein straight, slightly oblique, parted by more 

 than twice its length from the middle cross-vein, by seven times its 

 length from the end of the fourth longitudinal vein, and by more 

 than twice its length from the end of the fifth longitudinal vein ; 

 poisers white. Length of the body lj line ; of the wings 2| lines. 

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



G. Barnston, Esq. 



Chlorops bistriata, Barnstons MSS. Flava, verticis macula tho- 

 racisque vittis tribus latis nigris, pectore vittis piceis et ferrugi- 

 neis or nato, abdomine supra nigro, antennis ferrugineis, pedibus 

 fulvis, alis limpidis. 



Body bright yellow, shining : a black spindle-shaped spot on 

 the crown, extending from the hind head to the base of the feelers : 

 eyes pitchy, convex ; facets rather large : sucker and palpi pale 

 tawny : feelers ferruginous, a little shorter than the face, black 

 above ; third joint nearly round, much deeper than the second and 

 more than twice its length ; bristle black, bare, a little more than 

 twice the length of the third joint: chest adorned with three very 

 broad black stripes ; scutcheon yellow ; breast with two short pitchy 

 stripes, which have between them two triangular ferruginous marks 

 the outer sides of whose borders are pitchy : abdomen oval, not 

 longer than the chest, black above : legs tawny ; feet pale ferrugi- 

 nous, tawny at the base ; claws black : wings colourless ; wing-ribs 



