160 



mouth of Dipterous insects, was read before the Academie des Sciences on the 16th of 

 September, 1850. 



A revision of the Diptera contained in the Linnaean cabinet, by Mr. Haliday, has 

 been published in the Stettin ' Zeitung,' p. 131. 



' Insecta Britannica. Diptera: Vol. i.,' is the title of the 1st volume of the series 

 above alluded to. It contains the Brachyeeratous Diptera (except the Muscidae and 

 CEstridse), described by Mr. F. Walker. The synoptical tables of the distribution of 

 the families of the whole order, as well as of the genera of Empidae and Syrphidae, and 

 the whole of the text of the Dolichopidse, are by Mr. Haliday. The species of the last 

 named family, as well as of the Empidae (including the Tachydromidae and Hybotidae) 

 have especially received considerable addition to their numbers. Each genus is more 

 or less fully illustrated in ten elementary plates, Mr. Haliday having contributed ela- 

 borate details of several of the smaller genera. 



The 2nd part of the ' Insecta Saundersiana,' by Mr. F. Walker, has appeared (8vo. 

 pp. 80), containing descriptions of a great number of new exotic species and genera of 

 the families Stratiomydae and Asilidee, with figures of 16 of the most interesting genera. 



The 8th and 9th volumes of Zetterstedt's 'Diptera Scandinaviae' have lately ap- 

 peared at Lund. 



TlI'ULIDjE. 



An elaborate memoir by Loew on the natural history of the gall-midges (Cecido- 

 myia and Lasioptera), with a beautiful plate, appears in the ' Program ' of the Royal 

 Gymnasium of Posen for 1850, accompanied by a synoptical table of the species (62 

 Cecidomyiae and 7 Lasioptera?), amongst which are a great number of new species. 



Dr. Loew's supplemental memoir on the gall-midges (Cecidomyiae), and upon va- 

 rious new Tipulariae terricolae and European Asilidas, have appeared in the 5th volume 

 of the ' Linnaea Entomologica.' 



A note by Mr. Brown, on several species of Cecidomyia which attack wheat when 

 in blossom, appears in our ' Proceedings,' p. 105. 



Empidae. 



M. Alex. Lefebvre has published an extended notice relative to Em pis platyptera 

 (Ann. Soc. Ent. Fr. ix. 125), discovered by himself for the first time in France. 



Asiluxe. 



M. Leon Dufour has published extended descriptions, with figures of the larvae 

 and pupae, of a number of species of Asilus, Dasypogon and Laphria, (Ann. Sci. Nat. 

 3rd ser. xiii. 141). 



Scenopinidje. 



The position of the curious genus Scenopinus in a higher range than that assigned 

 to it by Latreille, among the Muscidae, has been confirmed by the figure and descrip- 

 tion of the pupa given by M. L. Dufour, (Ann. Soc. Ent. Fr. viii. 493). M. Dufour 

 is however in error in asserting that " les archives de la science gardent le silence le 

 plus absolu sur les metamorphoses du Scenopinus," as its larva and pupa are described 

 in my ' Introduction,' ii. 554, the former exactly resembling that of Thereva plebeia. 



