380 REPORT ON ZOOLOGY, MDCCCXLIV. 



chyle stomach is the longest piece of the alimentary canal ; it is simple 

 at its origin in some Tipulidre and the Mmtidas Acalyptrati ; fur- 

 nished, in the Tabamda, Asilidce, Stmtiomydce, Bombyliadce, Dolichopida, 

 Scenopinidce, &c., with 2 poucli- shaped enlargements ; with 4 such in the 

 Syri>hida> ; or, lastly, it is chalice-shaped, or has a circular welt in the 

 Conopida and M-uscidte. The bile-vessels usually 4, rarely 5 (Oulicidee), free 

 at the end, except in the larger Tipulides, where they form two bows with 

 4 orifices. Their insertion is sometimes with 4 distinct orifices, more com- 

 monly by 2 lateral ducts, rarely by a single one (Stratiomyda). Saliva- 

 vessels are found in all the Diptera, and these of simple form, either filiform 

 or oval. Excrementitious glands are rare in this order. In both sexes of 

 the Sepsidei the author found them placed on the coat of the rectum at the 

 upper side, and they produce a scented matter, which is discharged by the 

 anus. In the description of the reproductive organs he has turned to 

 account the able researches of Siebold and Loew. As respects the " sper- 

 motheca" of the oviduct in the 9, he thinks it must be considered as an 

 organ of secretion, as there is constantly a gland in connexion with it, but 

 he is not prepared to deny that it may perform the other function also. In 

 a postscript to the article on Piophila petasiotiis (ib. p. 385) some further 

 notice is taken of this matter.* 



Zetterstedt's Diptera Scandinaviae has been proceeding without inter- 

 ruption. This year (1844) the third volume has appeared, comprising the 

 genera Sceuopinus, Platypeza, Callomyia, Opetia, the Couopidse, Pipuucu- 

 lidEe, (Estridoe, and the first part of the Muscidse. 



Hoffmeister (Eut. Zeit. 360) has communicated his observations on the 

 occurrence of various Diptera. 



The Isis for 1844 (p. 419) contains a notice of Rondaui's writings upon 

 Diptera. (Memorie per servire all Ditterologia Italiaua, di C. Roudani, 

 Parma, i, ii, 1840 ; iii, 1841.) The first of these describes a blood-sucking 

 species, which constitutes a new genus, Phlebotomus, among the Tipulidte. 

 (A second paper on the same is inserted in the Ann. Soc. Eut. Er., see 

 "Report for 1843, p. 1 85, in which the name is printed erroneously Heboto- 

 mus, the author writes Elebotomus, according to the Italian mode of spell- 

 ing.) The next contains a new arrangement of the Tipulidae, and the 



* Narrat elm. L. Dufourius 1. 1. se quondam Piopldla petasionis in 

 copula depreheiisa, et abdoinine utriusque statini abscisso, mox scalpelli ope 

 certiorem facturn fuisse penem masculum, seu potius prseputium, immissum 

 csse in bursarn copulatoriam illam disteutabilem (quam insectis Dipteris 



deesse semper Loevius conteudit) et semen quoque in hanc effusum. Res 



tarncii ulteriorc probatioue videtur indigere, quum in casu praodicto constct 

 femiuam jam mortuam fuisse, vel moribundam, marc earn incunte. 



