LIST OF DIPTEEA. 547 



black, the latter tawny at the base and at the tips ; hind shanks pi- 



ceous : wings colourless ; wing-ribs ferruginous ; veins piceous ; 



poisers pale yellow. Length of the body 2 lines ; of the wings 4 

 lines. 



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



Ascia Anthermus, n. s., fern. Ferruginea, capite nigro maculato, 

 thoracis vittis duabusfuscis, antennis pedibusque fulvis, alis lim- 

 pidis, ad costam fuscis fuscoque oblique subfasciatis. 



Body ferruginous : head as broad as the chest ; a black spot in 

 front : eyes red; facets of moderate size : feelers tawny ; first joint 

 linear ; second joint club-shaped, about half the length of the first ; 

 third joint spindle-shaped, much longer than the second : chest 

 adorned with two broad dark brown stripes : abdomen rather more 

 than twice the length of the chest, very slender for half the length, 

 broader from thence to the tip : legs tawny, slightly covered with 

 down : wings colourless, long and broad, brown along the fore bor- 

 der, whence a short and very oblique band proceeds outwards into 

 the disk ; wing-ribs tawny ; veins piceous ; poisers tawny. Length 

 of the body 5 — b\ lines ; of the wings 11 — 12 lines. 



a. Para. Presented by J. P. George Smith, Esq. 

 h. Para. Presented by Reginald Graham, Esq. 



Sphegina, Meigen. 



Sphegina clunipes, Meig. Dipt. iii. 194, 1, pi. 28, /. 5. Macq. 

 Dipt. Nord. 17, 1, pi. 1,/. 2. Hist. Nat Dipt.L&76, I, pi. 12, 

 /. 21. Zett. Ins. Lapp. 581, 1. Zeller, Ent Zeit. Stettin, iv. 

 302, 1. Milesia clunipes, Fall. Syrph. 12, 10. 



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



Baccha, Fabricius. 



Baccha elongata, Fabr. Syst. Antl. 200, 6. Fall. Syrph. 14, 1 . ? 

 Meig. Dipt. iii. 197, 1, pi. 28, /. 13. Macq. Hist. Nat. Dipt 

 i. 577, 1, pi. 12, /. 22. Zett. Tns. Lapp. 581, 1. Curt. Brit. 

 Ent 737, 1. Syrphus elongatus, Fabr. Sp. Ins. ii. 430, 42. 

 Ent. Syst. iv. 199, 76. Musca elongata, Gmel. Ed. Syst. Nat. 

 v. 2873, 353. 



a. England. 



b. France. 



3 c2. 



