588 LIST OF DIPTERA. 



Syrphus Agonis, n. s., mas. JEneus, abdomine nigro, disco fulvo, 

 margine suturis vittaque dorsali nigris, vittis lateralibus fuscis, 

 antennis nigris, pedibus piceis, femoribus nigris, tibiis basi ge- 

 nubusque fulvis, alis subcinereis. 



Body brassy : head covered with hoary down, clothed behind 

 with short tawny hairs, and on the crown with black hairs : mouth 

 black, ferruginous towards the tip : feelers black : eyes brassy red : 

 chest clothed with short tawny hairs: breast gray: abdomen tawny, 

 with black sutures, a black border and a black stripe along the 

 middle ; there is also a slender brown stripe along each side : legs 

 pitchy ; thighs black ; shanks towards the base and knees tawny ; 

 tips of four front shanks also tawny : wings slightly gray ; wing- 

 ribs and poisers tawny ; veins black. Length of the body 3 lines ; 

 of the wings 6 lines. 



a. Galapagos. Presented by C. Darwin, Esq. 



Syrphus maculosus, Meig. Dipt. iii. 330, 84. Macq. Hist. Nat. 



Dipt. i. 544, 34. 

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



G. Barnston, Esq. 

 £. p From Mr. Children's collection. 



Var. /3. Hind thighs and hind shanks tawny : stripe of the 

 abdomen not appearing beyond the second segment. 



Syrphus scalaris, Fabr. Ent. Syst. iv. 308, 112. Panz. Faun. 

 Germ. xlv. 20. Latr. Gen. Crust, iv. 325. Meig. Dipt. iii. 

 330, 83. Macq. Hist. Nat. Dipt. i. 544, 33. Seaeva mellina, 

 Var. j8., Fall. Syrph. 46, 20. S. scalaris, Fabr. Ent. Syst. iv. 

 308, 112. Syst Antl. 252, 14. Zett. Ins. Lapp. 608, 41. 



a. England. 



b. France. 



c. Aix-la-Chapelle. Presented by F. Walker, Esq. 



d. ? From Mr. Children's collection. 



e. ? 



/. Ohio. Presented by the Entomological Club. 

 g. New York. Presented by E. Doubleday, Esq. 

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

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

 G. Barnston, Esq. 



Syrphus gracilis, Meig. Dipt. iii. 328, 80. Macq. Hist. Nat. Dipt. 

 i. 543, 32. 



a. England. 



b. Aix-la-Chapelle. Presented by F. Walker, Esq. 



c. New York. Presented by the Entomological Club. 



