92 RKViaiON OF THK STRATIOMYID^ OF AUSTRALIA, 



to a very small, black patch at the vertex). Thorax, in life, 

 brilliant green, in dried specimens, black; scutellum black, with 

 outer margin yellow, and with two, yellow spines Abdomen 

 black with green or yellow side- margins, whicli vary greatly in 

 size and shape. Legs entirely yellow, or, at the most, with the 

 hind tarsi a little darkened. Wings with the cubital vein 

 forked. Length, (J9, 9-11 mm. 



Hub. Queensland, New South Wales, Victoria, Tasmania, 

 South Australia, and Western Australia. 



This is, by far, the commonest, Australian species of Odonto- 

 tnyia, and is very widely distributed. Much variation is shown 

 in the extent of the green or yellow, abdominal side-margins, 

 which mav be narrow and almost straight, or broad and con- 

 siderably bowed in the middle. The type of 0. amyris, in the 

 British Museum, is a small variety, with narrow side-margins; 

 that of 0. ialemus has the side-margins broad and bowed in the 

 middle, but b(->th belong to the same species. 0. hunteri was 

 apparently described from a rather rare variety, in which the 

 green side-margins are reduced to large, basal spots. There is 

 also considerable variation in the colouring of the front in the 

 female; this has, normally, the upper tw^o-thirds black, the lower 

 third fulvous, but the fulvous portion may be reduced to a couple 

 of spots directly above the antennae; whilst, on the other hand, 

 a variety from South Australia, which may represent a distingt 

 species, has only the upper half black, and the lower half pale 

 yellow. In any case, however, 0. amyris may be distinguished 

 by the entirely fulvous or yellow face, and the entirely yellow 

 legs. 



Odontomyia subdp:ntata Maccj. 



Face black((J) or yellow with a black keel(2); thorax black; 



scutellum black, with a yellow margin and two very small spines; 



abdomen black, with yellow side-margins; legs entirely 3'ellow. 



Length, (^^5 ^ mm. 



This species was described by Macquart from "Australia." 

 0. anniilipen Macq., according to Macquart's description, 



differs from 0. snhdentata only in the colouring of the tibia'. 



