1893.] >IR. E. E. AUSTEX OS IfEW DIPTEUOFS INSECTS. KkJ 



Since Loevv's memoir uo addition has been made to the extra- 

 European species ol: Rhingia mentioned by him (Joe. cii.) : these 

 are Eh. nasica, Say (J. Acad. Phil. iii. 94 ; Compl. Wr. ii. 81 ; 

 Wiedemann, Auss. zw. Ins. ii. 115; Williston, Synopsis N. Amer. 

 Syrphidae, Bull. U. S. Nat. Mus. No. 31, p. 130), from North 

 America; Bh. nigra, Macq. (Dipt. Exot. i. Suppl. p. 133, t. 11. 

 fig. 10), from Colombia ; and Mh. la'vigata, L\v. (Wien. eat. 

 Monatschr. Bd. ii. p. 107), from Japan. 



From specimens in the Museum Collection I am able to state 

 that Lycastrirhyncha niiens, Bigot (Plate V. figs. 15, 16) (Kev. 

 et Mag. Zool. 1859, p. 307), from the Amazons, which Bigot 

 afterwards (Ann. Soc. Ent. Fr. 6* scrie, t. i. 1881, p. 373) 

 thought to be a BJungia, and identical with Eh. nigra, Macq., has 

 nothing whatever to do with Ehiiu/ia, but is one of the Eristalini. 

 The genus Lyeastrirhyni-ha is a perfectly good and very remarlv- 

 able one, which is characterized by possessing the body, wings, and 

 legs of an Eristalis and the head of a Ehingia, with a somewhat 

 elongated epistoma. The position of the anterior cross-vein of the 

 wings and the thiclceued posterior femora are in themselves suffi- 

 cient to dispose of all doubt as to the true affinities of the genus. 



The genus Lycastris of Walker (Trans. Ent. Soc. Loud. n. ser. 

 vol. iv. p. 155, — founded for a species from India), which Bigot 

 likewise proposes (loc. cit.) to sink in favour of Ehingia, is allied to 

 Criorhina I 



Brachyopa rufo-cyanea, Wlk. (Ent. Mag. ii. 472), from New 

 Holland,' is a Cyphipelta, Bigot (Rev. et Mag. Zool. 1859, p. 307), 

 and = C. conifrons, Bigot, loc. cit. (= Eristalis vesicularis,^v\c\\s., 

 — Wiegmann's Archiv, 1842, 272), which is the type of the genus. 

 Walker's species was published in 1834, and therefore his name 

 has the priority. This species is the only one of the genus hitherto 

 described. Bigot stated that the genus is most closely allied to 

 Volucella, but it has been shown by von Eiider (Wien. eut. Z. i. 

 61), who re-described the genus, that its proper position is nearest 

 EMiu/ia. 



EXPLAJNfATION OF THE PLATES. 

 Plate IV. 

 Fig. 1. Ocyptamus iris, sp. n., J, p. 133. 



2. Baccha ampkithoe, Wlk., 5 . P- 142. 



3. suHca, sp. n., 5 > P- 144. 



4. reful-gens, sp. n., J, P- 138. 



^. triangulifera, sp. u., <S , p. 138. 



fi. bicol-or, sj). n., ^ , p. 137. 



7. nubilipennis, sp. □., J, p. 136. 



8. sif/nifera, sp. n., (^ , p. 14.o. 



9. 7iubi/ipen>iis, sp. n., J , p. 1.3(5. 



10. 2^'^''t''^"'if^o7js, sp. n., cJ> P- 139. 



lU"^. Head of ditto from above, enliirged. 



11. Baccha pulchrif rolls, 5, p- 139. 



12. fallax, sp. ii., cJ', p. 142. 



13. incowpfa, sp. n., ^, p. 147. 



14. sagiftifera, sp. n., 9 > P- 144, 



1.5. levUshnn, sp. n.. c?, p. 140. 



11* 



