LIST OF DIPTERA. 1045 



Chyliza annulipes, Macq. Hist. Nat. Dipt. ii. 380, 2. 

 a. England. Presented by F. Walker, Esq. 



Chyliza metallica, Barnston's MSS., mas. et fem. Viridis, capite 

 subtus facieque Jlavis, palpis antennisque Jerrugineis, pedibus 

 fulvis, femoribus et tibiis anticis femoribusque posticis cyaneo- 

 viridibus, tarsis anticis nigris, alis limpidis. 

 Male. — Body dark green, shining : head and chest beset with 

 a few black bristles : crown of the head black ; face and under-side 

 pale yellow ; sides of the face without bristles ; epistoma uot promi- 

 nent : eyes red ; fore part composed of larger facets than those else- 

 where: sucker ferruginous, clothed with tawny hairs ; palpi ferru- 

 ginous, beset with black bristles : feelers ferruginous, partly pitchy, 

 clothed with short black hairs, as long as the face ; third joint 

 nearly elliptical, as long as the second ; bristle black, downy, longer 

 than the third joint: abdomen spindle-shaped, a little longer than 

 the chest: legs tawny, clothed with very short black hairs; fore 

 thighs and fore shanks blue, tawny at the base ; fore feet black, ra- 

 ther broad ; hind thighs bluish green : wings colourless ; wing-ribs 

 and veins pale yellow; longitudinal veins straight; lower cross-vein 

 straight, almost perpendicular, more than twice its length distant 

 from the middle cross-vein ; poisers tawny. Fem. — Abdomen ferru- 

 ginous at the base beneath, much attenuated towards the tip, full 

 twice the length of the chest. Length of the body 1| — 2 lines ; of 

 the wings 3 lines. 



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

 G. Barnston, Esq. 



Prochyliza, n. g. 



Body narrow: head advanced in front and forming a protube- 

 rance on which the feelers are seated : feelers longer than the head ; 

 first joint short; second very long ; third elliptical, about half the 

 length of the second. 



Prochyliza xanthostoma, n. s., mas. Nigra, nitens, capite subtus 

 et facie Jlavis, abdomine subcompresso , palpis Jlavis, antennis 

 piceis, pedibus Julvis, femoribus et tibiis anticis, tarsis posteri- 

 oribus apice tarsisque anticis piceis, alis limpidis angustis. 

 Body black, shining, thinly clothed with short black hairs : 



head and chest beset with a few black bristles : head narrow, yellow 



beneath ; face yellow, with a single bristle on each side at the base ; 



epistoma not prominent : eyes pitchy, convex ; facets of the fore 



