LIST OF DIPTERA. 487 



Hybos reversus, n. s. Niger, antennis nigris, pedibus Jlavis, tibiis 



posticis coxis et femoribus nigris, femoribus anterioribus apice 



- flavis, tibiis anterioribus basi fulvis, tarsis anterioribus apice 



tarsisque posticis fulvis, alis subfuscis vittis obscurioribus basi 



limpidis. 



Body black, shining : eyes dark bronze : feelers black : abdo- 

 men clothed with long hoary hairs : legs yellow ; hips, thighs, and 

 hind shanks black ; tips of four front thighs yellow ; four front 

 shanks tawny towards the base ; hind feet and tips of four front feet 

 tawny : wings pale brown, darker along the borders of the veins, co- 

 lourless at the base ; wing-ribs and poisers yellow ; veins piceous, 

 yellow towards the base. Length of the body 2 lines ; of the wings 

 4 lines. 

 a. Trenton Falls. Presented by E. Doubleday, Esq. 



Hybos subjectus, n. s. Niger, antennis pedibusque nigris, genubus 

 fulvis, tarsis anticis flavis apice piceis, tarsis posterioribus piceis 

 basijlavis, alis nigro-fuscis apice subcinereis. 



Body black, shining : eyes dark red : feelers black ; legs black ; 

 knees tawny ; fore feet yellow, piceous towards the tips ; four hind 

 feet piceous, yellow at the base : wings dark brown for a little more 

 than half the length from the base, tinged with gray from thence to 

 the tips ; wing-ribs and veins black ; poisers piceous. Length of 

 the body Inline; of the wings 3 lines. 



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

 G. Barnston, Esq. 



Ocydromia, Hoffmansegg. 



Ocydromia glabricula, Fall. Dipt. Suec. Empid. 33, 42. Meig. 

 Dipt. ii. 352, 1, pi 21, /. 23. Macq. Hist. Nat. Dipt. i. 320, 

 1. Zett. Ins. Lapp. 536, 1. 



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



b. Alten, Finmark. Presented by F. Walker, Esq. 



Ocydromia rufipes, Meig. Dipt. ii. 353, 2, pi. 21,/. 24. Zett. Ins. 

 Lapp. 536, 2. 



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



b. France. 



Ocydromia scutellata, Meig. Dipt. ii. 354, 5. Macq. Hist. Nat. 



Dipt. i. 320, 3. Zett. Ins. Lapp. 537, 4. 

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



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