CLASSIFICA TION OF DIPTERA . 1 3 



tions of a large number of European and Exotic genera and species, 

 and thus a foundation for a satisfactory classification was arrived at. 



Latreille was one of the first who attacked this subject in a scientific 

 way, and he worked at the affinities of the group. He based his 

 classification on the trophi and the transformations. Macquart 

 classified the Diptera as follows : 



Division l. iVtvywctv-a = Tipulidns and Culicida?. 

 ,, 2. Brathycera. 



Sub. Div. i. Hcxacliata (six setce in mouth). 

 ,, ,, ii. Teirac/urta (four ditto). 

 ,, ,, iii. Diclucta. 



Latreille, in his " Families Naturelles," classified them according to 

 their metamorphosis, and divides them into four families, viz. : i. 

 Nemocera ; 2. Tatiysfoma ; 3. Notacantha ; 4. Athericera. 



Number three including the StratiomydicB. This arrangement of 

 Latreille's is nearly followed by Westwood in his " Introduction to 

 the Modern Classification of Insects" (1840). He divides the flies 

 into the following two sections : 



Section i. — Head always distinct from thorax. Claws of tarsi not 



dentated. LarvK develop outside the parent. 

 Section 2. — Head immersed in the thorax. Claws denticulate. 



Larva nourished in the parent. 

 Sectio7i I. — A. Nemocera. (Stirps i.) 



Antennae having more than six joints. Palpi four 

 to five jointed = Culicidae PipuUdse. 

 B. Brochycera. 



Antennae having not more than three joints. Palpi 

 one to two jointed. 

 (Stirps 2.) Notacantha. 



Antennae apparently composed of only three joints ; 

 last joint articulated. Proboscis exserted, seldom 

 enclosing more than two lancets. Structure of 

 the mouth very incomplete, and number of setai 

 variable. Pupa coarctate ; the skin of the larva 

 nearly retaining its previous form = (Stratiomidae, 

 etc.). 

 (Stirps 3.) Tanystoma. 



Antennae only ihree-jointed, terminated by a seta. 

 Proboscis exserted generally with four sette. Pupa 

 incomplete = {Tabanidcc, Bombyliidce, Einpidce 

 Leptidcv, Dolichopodidce, etc.). 

 (Stirps 4.) Athericera. 



Antennae with only two or three joints, terminated 



