LIST OF DIPTERA. 579 



Syrphus Pyrastri, Fabr. Sp. Ins. ii. 432, 58. Ent. Syst. iv. 305, 

 102. Latr. Gen. Crust, iv. 325. Meig. Dipt. iii. 303, 44. 

 Macq. Hist. Nat. Dipt. i. 536, 3. Musca Pyrastri, Linn. Syst. 

 Nat. ii. 987. Faun. Suec. 1817. GmeL Ed. Syst. Nat. v. 

 2875, 51. Schrank, Faun. Boic. iii. 2431. Ins. Austr. 907. 

 Musca, &c, Reaum. Ins. iii. pi. 31, /. 9. Geoff. Ins. ii. 517, 

 46. Albin. Ins. pi. 66, a—d. Berk. Syn. i. 163. Don. Brit. 

 Ins. xii. 19, pi. 401, /. 1. Stew. El. ii. 266. 7V^. iii. 649. 

 M. Ros.ae, Deg. Ins. vi. 49, 5, j^Z. 6, /. 14 — 21. Scaeva Pyras- 

 tri, Fabr. Syst. Anil. 2493. Fall. Syrph. 39, 5. Ruricola, 

 Gard. Chron. 1842, 1441. S. unicolor, var. Cur*. Brit. Ent. 

 519. 



a. England. 



b. France. 



c. Egypt. 



d. — ? From Mr. Children's collection. 



Syrphus Agnon, n. s., fem. Nigro-cyaneus, fronte abdominisque 

 fasciis tribus interruptis flavis, antennis piceis, pedibus fulvis 

 posticis nigris, alis limpidis. 



Nearly allied to S. Pyrastri. Body bluish black : head yellow 

 in front: mouth black : eyes and feelers pitchy : chest and breast 

 clothed with short pale hairs ; scutcheon with a tawny tiuge : abdo- 

 men adorned with three interrupted yellow bands, of which the se- 

 cond and the third are curved on each side ; the bands are entire 

 on the underside : legs tawny ; hind legs mostly black : wings 

 colourless ; wing-ribs, veins, and brands black ; poisers tawny. 

 Length of the body 5 — 5i lines ; of the wings 10 — 11 lines. 



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



G. Barnston, Esq. 



b. Nova Scotia. From Lieut. Redman's collection. 



Syrphus Alcidice, n. s., fem. Nigro-eeneus, capite scutelloque fulvis, 

 abdominis fasciis quatuor cinereis, antennis fuscis, pedibus ful- 

 vis, posticis plerumque nigris, alis subcinereis. 



Nearly allied to S. Ribesii. Body brassy black : head tawny, 

 adorned with a short black stripe in front : eyes brassy red : mouth 

 black : feelers dark brown : chest and breast clothed with tawny 

 hairs; scutcheon dark tawny: abdomen black, adorned with four 

 interrupted gray bands ; the band next the base has a tawny tinge 

 on each side : legs tawny ; thighs darker towards the base ; hind 

 legs, except the knees, almost black on the upper side: wings 

 slightly gray ; wing-ribs and brands dark brown ; veins black ; poi- 



