BY ARTHUR WHITE. 20") 



]913. 



Thorax olive ; hind femora orangje. dsiiva, Sp. nov. 



Of these species, L. hancrofii, dissimilis, aud ausirahs are 

 from Queensland, gemadaia from Queensland, New South 

 Wales, and Tasmmia, ocddentalis from Western Australia, 

 and antipoda, fumipennis, vernalis, and astiva from Tasmania. 



Leptogaster vernalis^ Sp. nov. 



A very small delicate species. Thorax brown, with three 

 broad, dark brow^n, longitudinal stripes in the male, which 

 occupy the greater part of the dorsal surface ; iti the female 

 thorax lighter, and practically unstriped ; abdomen black 

 (male), or dark brown (female) ; legs brown, with base of 

 posterior femora and tibiae whitish. 



Length. Male, 7-5-8 mm ; female, 105 mm. 



Locality. Bagdad Vallev, Tasmania. 



Male. Face and moustache white ; front pale yellowish. 

 Antennae black. Thorax brownish, with one median and two 

 Literal broad brown stripes, that occupy the greater part of 

 the dorsal surface ; sides and scutellum pale grey. Abdomen 

 black, with segmentations very indistinctly paler ; the first 

 segment with a few whi+e bristles on either side. Legs 

 brown, with knees darker ; posterior femora and tibiae 

 whitish at the base, the latter with white bristles; tarsi with 

 basal half of first joint white, remainder brown. Wings 

 clear, veins black ; cross-vein closing second basal cell joins 

 the peduncle of fourth posterior cell at about two-thirds of 

 its length. 



Female. Much larger than the male. Thorax brown, in- 

 distinctly striped. Abdomen dark olive brown. Legs as in 

 the male, except that the knees are barely darkened, and 

 first joint of tarsi is two-thirds whitish. 



This species can only be confused with Z. geniadata and 

 L. (Estiva. From the former it may be distinguished by the 

 colouring of the thorax and its smaller size, also by its 

 occurriui,^ in the early instead of the late summer ; from the 

 latter species by its brown legs with barely contrasted knees, 

 instead of orange legs with conspicuously contrasted black 

 knees, and also by its smaller size. 



This species is on the wing from early in November to the 

 middle of January. It may be swept from long grass on 

 high ground. 



Leptogaster cEstiva, Sp. nov. 



A medium-sized species. Thorax and abdomen olive, the 

 former in^listinctly striped ; all femora bright orange, with 

 black knees. 



