BY ARTHUR WHITE. 201 



46. C o M p T o s I A, Macq. 



Antennae composed of three very short joints and a long- 

 aristiforni style ; abdomen rather broad, and distinctly flat- 

 tened ; both thorax and abdomen moderately pubescent; 

 wings with the radial vein strongly looped before its end ; 

 number of submarginal cells two or three. 



Head about equal in breadth to the thorax. Eyes very 

 narrowly separated in male. More widely in female. Pro- 

 boscis either porrect, and about half the lengtli of head, or 

 completely concealed within the oral aperture. Antennae 

 w^ith the three joints very short, and almost concealed by 

 stiff pubescence, the third terminated by a long aristiform 

 st^dei, which is about equal in length to the three antennal 

 joints together. Thorax somewhat arched, and moderately 

 pubescent. Abdomen rather broad and distinctly flat- 

 tened, with fairly long lateral pubescence. Legs moderately 

 slender ; tibiae with short bristles. Wings with either two 

 or three submarginal cells, and four posterior cells, the 

 latter being all open, as is also the anal cell ; radial vein 

 much looped before its end, and frequently strongly re- 

 current ; the median cross-vein situated close to' the apical 

 end of the discal cell. 



This genus contains a large number of Australian species. 

 These fall into two divisions, according to the number of 

 the srubmarginal cells, which may be either two or three. 

 Macquart originally described the genus as possessing 

 three submarginal cells, but afterwards placed in it species 

 in which only two were present ; this, I think, is cjuite cor- 

 rect, as the numbeT of submarginal cells seems to me to be 

 a specific character only. The considerable variation in the 

 curvature of the radial vein also seems tC' be only of specific 

 value. Many cf the Australian species were described by 

 Wplker under the genus Anthra r. 



From Tasmania three species have been described. 



Table of the Taswanian Siierieft of Com pto^ia. 



1. Wino-s brown, with hvaline spots, and a white 



hvaline band across- the tips ; number of submar- 

 g-inal cells two. Maculipennis, Macq. 



Wings hyaline, with foremarain broadly brown, 



and four small brown spots below. 2 



2. Two submarginal cells. Geometkica, Macq. 

 Three submarginal cells. Corculum, Walk. 



COIMPTOSIA MACULIPENNIS, Macq 



Syn. Anthrax ocellata, Walk. 

 Anthrax inchi.m, Walk. 

 Anthrax rogiiata. Walk. 



