194 KBCOHDS OK THE AUSTKALIAX MUSEUM. 



Pacuy(;astek wuhei llnnhj. 

 Pachyijaster irliltel Hardy, Proc. Roy. Soc. Tasm., 1920, p. 44. 



Description. — ? . Black. Head shining ; eyes widely separated, 

 facets of uniform size ; antennje yellowish red. There is some silvery 

 pubescence around the base ot" the anteniiiB, on the face, also traces behind 

 tlie eyes. 



Thorax, scutelluni, and abdomen uniformly and densely punctate 

 over the whole upper surface. The scutellum lies horizontally and is 

 semicircular in shape ; on its outer border are forty or more minute 

 (microscopic) spines. Legs yellow or yellowish red, but stained darker 

 in parts. Wings hyaline and veins more or less stained black from the 

 base to less than half the length of the vi'iug ; the remaining portions of 

 the venation are yellowish. Cubital vein forked. 



5- The male is rather like the female but more slender in shape. It 

 differs chiefly by the contiguous eyes, the facets of which are variable in 

 size, the larger being on the upper side. Also the scutellum is triangular 

 in shape with a rounded apex, and it is slightly inclined ; the minute 

 spines are less discernible than those t)n the female. 



Length. — 3^-4^ mm. 



Hah. — Tasmania, ? Victoria, and New South Wales. 



Types. — The holotype female and the allotype male are in the 

 Australian Museum. 



Pachygaster nitens sp. nov. 



Description — 9 . Black. Head shining, eyes widely separated, facets 

 of uniform size; anteunie yellowish. There is some silver pubescence 

 around the base of the antennae, on the face, and behind the eyes. 



Thorax shining; it contains widely separated and small punctni'es 

 over the whole upper surface. The scutelluni lies hoiizontally and has 

 punctures similar to those on the thorax ; it is semicircular in shape, and 

 on its rounded outer border there are about thirt}^ minute (microscopic) 

 spines. Abdomen densely punctate. Legs black, tarsi yellow. Wings 

 hyaline ; the veins black from the base to less than half the length of tlie 

 wing; the remaining portions of the venation are yellow. Cubital vein 

 forked. 



5. Male unknown. 



Length. — Female, 4 mm. 



Hah. — Queensland. The National Park, March 1921. Four females 

 were captured in a tent during the hottest part of the day. 



Type. — The holotype is in the Australian IMuseum. 



Genus DocUMiocEKA geii. nov. 



This genus is proposed for a species of Stiatiomyiid belonging to the 

 sub-family J'achygasteriini'. The oblique segments of the antenna% from 

 which the genei'ic name is derived (oblique-horn) and the longer thorax 

 will at once distinguish it from the genus I'arhygaster, which it resembles 

 in other respects. 



