LIST OF DIPTERA. 1093 



the base ; foot-cushions pale tawny : wings gray, tawny for some 

 breadth beneath the fore border and along the veins in the disk ; 

 wing-ribs and veins tawny ; longitudinal veins straight ; middle 

 cross-vein straight, upright; lower cross-vein straight, very slightly 

 oblique, parted by more than twice its length from the middle cross- 

 vein, by thrice its length from the end of the fourth longitudinal 

 vein, and by near half its length from the end of the fifth longitu- 

 dinal vein ; poisers tawny ; scales yellow, very small. Length of 

 the body 3f lines ; of the wings 6^ lines. 



a. Nova Scotia. From Lieut. Kedman's collection. 



Helomyza quadrimacula, n. s., mas. Fidva, lateribus subtusque 

 flava,) palpis Jlavis, antennis pedibusque fulvis, tarsis ferru- 

 gineis, alis fulvis f us co quadrimaculatis. 



Body pale tawny, yellow on each side and beneath, thinly 

 clothed with black hairs : head and chest beset with a few black 

 bristles : sides of the face without bristles ; epistoma not promi- 

 nent : eyes red, with a coppery tinge, fringed with short black hairs ; 

 fore part rather flat 3 its facets a little larger than those elsewhere : 

 sucker and palpi yellow : feelers tawny, a little shorter than the 

 face; third joint conical, downy, twice the length of the second ; 

 bristle black, tawny at the base, much more than twice the length 

 of the third joint, feathered to the tip on both sides with rather 

 long black hairs : abdomen obconical, narrower and a little shorter 

 than the chest : legs tawny, thinly clothed with very short black 

 hairs; feet ferruginous; claws black; thighs beset with rows of 

 short black bristles : wings tawny, each adorned with four brown 

 spots, oue on each cross-vein, the third near the tip, descending 

 from the fore border into the disk, and approaching the fourth 

 which is near the hind border ; wing-ribs and veins tawny, the lat- 

 ter darker towards the tips, pitchy in the brown parts of the wing ; 

 longitudinal veins straight ; middle cross-vein straight, slightly ob- 

 lique ; lower cross-vein nearly straight, slightly oblique, parted by 

 nearly twice its length from the middle cross-vein, by much more 

 than twice its length from the end of the fourth longitudinal vein, 

 and by half its length from the end of the fifth longitudinal vein, 

 which does not reach the hind border ; poisers tawny. Length of 

 the body H line ; of the wings 3 lines. 

 a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



