Hale — Aquatic Hemiptera 



317 



yellow lilies; iicavly twice as brofid between lninier;il niio'les as medial length; 

 rastrate, and Avitli a median carina, most distinct anteriorly; ])osterior margin 

 angularly convex; lateral margins short; angles roundly obtuse. Hemelytra 

 brownisli-ldack, marked with yellow, Avith a few fine yellow hairs; sutures mar- 

 gined with yellow; clavus with oblique, sub-transverse, angularly-wavy lines, 

 rastrate; corium with fragmentary wavy lines, arranged in Four rather ill-defined 

 longitudinal series; markings on membrane transverse anteriorly, sub-parallel 

 on inner margin and twisted on the disc ; embolium pale yellow. Sternum and 

 legs ochraceous; underside of ahdomen ]nile testaceous; strigil dark brown, large, 

 roundly sub-quadrate, with six rows of striae ; anterior tibiae stout ; palae cultrate, 



Fitf. 342. Arctncovisa suhlacvifroitK. 



sub-truncate, narrowest at base; upper margin almost straight, slightly sinuate, 

 aiKJ anteriorly suddenly bent obliquely doAvnwards and forwards to apex; claw 

 rather weak; tAventy-four short stridulatory pegs in a single row sub-parallel to 

 the superior margin, not reaching to apex ; anterior pegs longest, the series regu- 

 larly decreasing in size backAvards ; intermediate claAvs as long as the tarsi. 

 Length, 6 mm. 



5 Slightly larger and more robust than the male. Palae as in female of" 

 A. (iitstralis, but head shorter. 



Ilah. Victoria: Coromby (type locality, J. (i. (). Tepper), Mell)ourne and 

 Plenty River (Searle), Croydon, GumboAver, and Mount Macedon (National 

 Museum). Type, I. 15184. 



The variation is as folloAvs : Pronotal lines seven to eight ; palal pegs twenty- 

 one to tAventy-four. 



Like A. australis. this species is of elongate form, l)ut the head is less pro- 

 duced in front. The male differs in the slight facial impression and lesser number 

 of }>alal pegs. 



