LIST OF DIPTERA. 



Group X. Ephydra, Hal. Ann. Nat. Hist. iii. 410. 



Ephydra riparia, Fall. Act. Holm. 1813, 246. Hydromyz. 3, 1 . 



Meig. Dipt. vi. 117,9. Macq. Hist. Nat. Dipt. ii. 537, 5. 



Hal. Ann. Nat. Hist. iii. 410, 33. Zett. Ins. Lapp. 715, var. 



b. Stenh. Monogr. 169, 2. Zett. Dipt. Scand. v. 1807, 1. E. 



albula, Meig. Dipt. vi. 115, 4, fern. ? E. salinarum, Bouche, 



Naturg. Ins. i. 99, pi. 6. /. 13—14. 

 a. England. Presented by F. Walker, E§q. 



Group XI. Canace, Hal. Ann. Nat. Hist. iii. 411. 



Ephydra nasica, Hal. Ann. Nat. Hist. iii. 411, 35. 

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



Obs. — The following species of Ephydra are not arranged ac- 

 cording to the preceding groups. 



Ephydra glauca, Meig. Dipt. vi. 120, 18. 

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



Ephydra glabricula, Meig. Dipt. vi. 121,19. Macq. Hist. Nat. 



Dipt. ii. 538, 11. 

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



Ephydra raelanostoma, Meig. Dipt. vi. 123, 26. 

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



Ephydra picea, n. s., fern. Fusca, abdomine piceo, palpis antennis 

 pedibusque nigris, alisfuscis maculis quatuor limpidis unaque 

 picea ornatis. 



Body dark brown : head and chest beset with black bristles : 

 eyes pitchy ; sucker, palpi, and feelers black ; third joint of the 

 feelers conical, longer than the second; bristle stout, bare, tapering, 

 near thrice the length of the third joint : abdomen pitchy, ellipti- 

 cal, flat, a little longer than the chest : legs black ; foot-cushions 

 tawny : wings dark brown ; the disk adorned with four colourless 

 spots ; a small pitchy spot at the tip of the first longitudinal vein ; 

 wing-ribs and veins black ; tip of the second longitudinal vein not 

 curved upward ; poisers tawny. Length of the body 1 line ; of 

 the wings 2 lines. 



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

 G. Barnston, Esq. 



