Mr. G. W. Kiikaldy on Aquatic Ithynchota. 55 



tudiiially mctlianly cariiiato ; palaj rather stouter tlian in 

 female. Eyes sortlid pinkish. 



Striyil exceedingly minute, bluish black, subquadrate, with 

 four broad rows of " teeth." 



? . Head very convex, facial iwpression and labium 

 forming an ovoid, the base of which is continued slightly 

 beyond the apical margins of the eyes ; the impression is 

 covered with short, dense, pale golden hairs. 



Head mediaidy longitudinally cariuate. Eyes greenish. 



Long. 8'0-9 millim. 



Adelaide Kiver, South Australia: British Museum. 



I am indebted to Mr. W. F. Kirby, F.L.S., for permission 

 to describe the two preceding species. 



3. Corixa australisy Fieber. 



Corixa australis, Fieber, Abb. k. biJbm. Ges. Wiss. (o) vii. p. 232, 

 pi. i. fig. 16 (1851). 



I/ead punctate. Width of base less than that of either 

 eye (as seen from above). 



Pronotum obtuse-angled, very rastrate. 



Pedes : intermediate tibiai rather longer than the unguiculi, 

 which are much longer than the tarsi. 



(J. IStriyil comparatively large, suboval, truncated at both 

 ends, bluish black, iurnished with five or six rows of " teeth," 

 the fourth or fifth being broken up into two or three dextro- 

 laterally. 



Facial impression obovate, very large and deep, extending 

 almost to the vertex; base of the interior impression curved, 

 its lowest point in a line with the apical margins of the eyes. 



The female has not yet been described. 



1 have not seen the type of this species, but two males 

 from Tasnj^ania in the British Museum accord with Fieber's 

 description and his figure of the male palge. 



1 am acquainted with only three Australian Corixce, all 

 very different : — C. australis, Fieber, apparently belonging 

 to the ^^ limitata, Fieber," group; C. eurynome, described 

 above; and a species allied to striata, Linn., of whicii I have 

 seen a single specimen. Two species are also recorded from 

 New Zealand : — C. arguta, Buch. White (Ent. Month. Mag. 

 XV. p. 161, 1878), and C. zealandica (figure, but no descrip- 

 tion), Hudson (Element. Man. Insects N. Z., 1892). 



There are doubtless very many species yet to be recorded 

 from those countries. 



Notes. 

 Corixa subjacenSj Walker, in Tennant's Ceylon, i. (2nd ed.) 



