Div. 3. ARTICULATA.— INSECTA. 655 



Lapponica of the latter author. The classification proposed in the "Diptera Scandinaviie" (which is a motUii- 

 cation of that in the Insecta Lapponica, is as follows : — 

 Class I. Brachycera. Antennae, two- (or three-) jointed ; Palpi, two- (or three-) jointed. 

 Order 1, Polychoeta. Haustellum, with four or six lancets, &c. 



Section!. Antennaj with the third joint annulxted, without any apical style. This section comprises 



the families— 1. Tabanii. 2. Xylophagii. And 3. Stratiomyd.-e. 

 Section 2. Antennaj with the third joint not annulated (generally without a dorsal seta). Families— 

 4. Asilici ; 5. Bombyliarii ; 6. Anthracides ; 7. Leptides ; 8. Acrocerinaj ; 9. IIybotid;e ; 10. Tachy- 

 dromides ; 11. Empidise ; 12. Dolichopodes ; 13. Syrphici (this family haying a dorsal seta to the 

 antenna;). 

 Order 2. Dichoeta. Haustellum with only two lancets. 



Section I. Athericera. Haustellum with a proboscis, claws simple. 



Subdivision 1. Wings with a distinct angulated cell. Families— 14. Scenopinii ; 15. Platypezina; ; 



16. Conopsaria;; 17. Myopariae ; 18. Pipunculini. 

 Subdivision 2. Wings without a distinct angulated cell. Families — 19. Oestrides ; and nineteen 

 other families separated from the genus Slusca of this work (p. G32— 636). 

 Section 2. Haustellum, covered by two palpi, but without a terminal proboscis. Family— 39. Coriacece 

 [Ilippoboscidre.] 

 ('I'ass IT. Nemocera. Antennre, with not fewer than six joints. 



A. Winged. Families — 40. Hirteides ; 41. Scatopsitles ; 42. Simulides ; 43. Rhyphii; 44. Culicides ; 45. 



Cbironomii ; 46. Cecidomyzides ; 47. Psychodides ; 48. Sciarinse ; 49. Tipulides ; 50. Mycetophilinse. 



B. Wingless in both sexes. Family — 51. Chioneides. 



The genera and species are admirably worked out in these works by Zetterstedt, which are a model for the 

 monographer. 



Other general works on the Diptera are the following :— Loew's Bemerkungen iiber die in der Posener Gegend, 

 Zweiflugler— Gattungen, and Dipterologische Beitrage, in 4to., and various papers in the Linncea Entomologica, 

 and Entomologische Zeitung, of the Stettin Society ; Zeller's Beitrag zur Kenntniss der Dipteren, and Dipterolo- 

 gische Beitrage. Staeger, on Danish Diptera, in Kroyer's Natural History Journal, and on the Diptera of Green, 

 land, in ditto. Gimmerthal, Dborsicht der Zweiflugler Lief, and Kurland's (Bulletin Moscow Soc), and on 

 Russian Diptera, also in Bulletin Moscow, 1845. Rondani Memorie per servire aUa Ditterologia Italiana, (nine 

 separate memoirs in the Transactions of the Bologna Academy). 



Yarious anatomical memoirs by Loew and Leon Dufour have also been published. 



Of detached monographs on the families or genera of this order, the foUovring are the most important :— 

 In the Nemocera (p. 617—621) ; 



The genus Anopheles (p. 618), is monographed by Loew, in the first part of his Dipterologische Beitrage, 

 and three new genera established, allied to Cecidomyia. The genera Scatopse and Bibio are treated 

 in like manner by the same author, in the First Volume of the Linnsea Entomologica. 



Two admirable papers by Dr. Asa Fitch, on the Wheat and Hessian flies belonging to the genus Cecidomyia, 

 have been published in the Transactions of the New York State Agricultui-al Society, Vols. V and VI. The 

 cco::omy of other species of Cecidomyia have been illustrated by Ferris and L. Dufour, in the French Annales ; 

 and by Ratzeburg, tn hi? Forst Insecten. Perris has also given the Transformations of Psychoda nervosa, in the 

 same Annales. An excellent monograph on the Asilida; is given by Loew, in Vol. Ill of the Linna;a Entomo- 

 logica, in which a great number of new species and several new genera are proposed. Yarious new genera of 

 Borabyliidse are also described by the same author, in the above-mentioned works. An illustrated monograph of 

 the fine f.imily Mydasida;, is given in my Arcana Entomologica, and the singular family Vesiculosa, or bladder- 

 flies, havebeen monographed by Erichson, in his Entomographien ; and many additional species described by 

 myself, in the Transactions of the Entomological Society. The Dolichopodes, monographed by Mr. Haliday, in 

 the Zoological Journal, have been again revised by Staeger, in Kroyer's Journal. 



The genera Oxycera, Thereva, and Conops, are also monographed by Loew, in his Dipterologische Beitrage, as 

 well as several genera of Muscida;. The Italian species of Merodon and Chrysotoxum, have been described by 

 Rondani, and a monograph of the genus Ceria, published by Saunders, in the Transactions of the Entomological 

 Society. 



The parasitic CEstridae have formed the subjects of several -valuable memoirs, namely— a paper on the anatomy 

 of Gastrus Equi, by Van der Kolk ; a memoir by Dr. Schwab, Die CEstraciden Bremseu der Pferde, Rinder und 

 Schafe, Munich, 1840. A supplementary paper by Bracy Clark, in Vol. XIX of the Linnsean Transactious, and a 

 paper by Goudot, on Cuterebra noxialis, in the French Annales. A fine monograph has also been published in 

 the Annals of the Lyons Academy. 



The great family Muscid;u, has been specially investigated by Robineau Desvoidy and Macquart, in the French 

 Annals, between whom a discussion on the principles of classification of the family has taken place, the latter 

 author having reduced many of the species proposed by the former, to varieties of other established species. 

 Many detached genera have been monographed by Loew ; and the splendid genus Rutilia, by Gucrin, as well as the 

 interesting Ceratites, the type of which commits so much damage to the cargoes of oranges. The Ephydrini 

 have also been revised by Stenhammer, in the Transactions of the Stockholm Academy, and many Danish 

 groups have been monographed by Staeger, in Ki-oyer's Journal. The beautiful genus Trypeta, has been mono- 

 graphed by Walker, in the Entomological Journal, and by Loew, in the Linna;a Entomologica ; .ind a valu.ible 

 memoir on the anatomy of the Hippoboscid^, has been published by Leon Dufour, in the Ann.iles des Sciences 

 Naturelles. 



