LIST OF DIPTERA. 



Family 1. STRATIOMID^. 



Caput sat magnum. Antennae 5 — 10 articulates. Alae com- 

 plete ; vena costalis prope alae apicem terminaia ; vena cubitalis 

 furcata ; areola analis longa. Halteres manifesti. 



Stratiomydes, Latr. Gen. Crust.; Fall.; Meig.; Macq. ; Zett. 



Tetrachaeta, p., Macq. Hist. Nat. Dipt. i. 218. 



Notacantha, p., Latr. ; Macq. Hist. Nat. Dipt. i. 220 ; Perty ; Westw. 



Xylophagii, p., Meig.; Latr.; Macq. 



Xylophagidae, p., Steph. 



Stratiomidae et Beridae, Westw. 



Stratiomida, Perty. 



Xylophagina, p., Perty. 



Xylophagi, p., et Slratiomydae, Loew. 



Polychaeta, p., Zett. 



Xylophagii, p., et Stratiomydae, Zett. 



Stratiomenae, Rondani. 



Tribe, Tabanidii. Sub-tribe, Stratiomydas, Bigot. 



The accompanying plate sufficiently illustrates the wing-veins 

 of this family, which is especially characterized by the principal 

 wing-veins being crowded together towards the costa, the discal 

 areolet also is much in front of the middle of the wing, and the 

 externo-medial veins are secondary, or are more or less faintly 

 indicated. This structure is most apparent in the first, fourth and 

 fifth groups of the ensuing arrangement, the other genera are 

 abnormal, and may be separated from this family. Xenomorpha 

 and Exochostoma are the most aberrant, on account of their simple 

 cubital vein. 



The transition of the structure of the antennae of Nemocera to 

 that of Brachycera begins with the Stratiomidce ; the joints after 

 the second are no longer equal and equidistant, but are closely con- 

 nected, and form one mass, and are generally considered as a single 

 joint. 



A. Antennarum articulus 3us simplex. 

 A. Arista nulla aut brevis. 

 a. Antennas 10-articulatas. 



a. Antennae ramosae. - - - - 1. Ptilocera. 



b. Antennas simplices. 



i. Scutellum bituberculatum. - - 2. Exochostoma. 

 ii. Scutellum 4 — 8 spinosum. 



1. Palpi clavati. - - - - 3. Diphysa. 



2. Palpi subobsoleti. - 4. Beris. 



3. Palpi longi. ----- 5. Actina. 



