54 Mr. G. W. Kirkaldj on Aquatic Rhijnchota. 



Tlie female apparently has no facial impression. 



Head very convex, frons with a longitudinal median carina. 

 Palce : first segment sublunate ; second segment short, very 

 narrow, slightly convex, subcylindrical. 



N.B. — This second segment appears to be a genuine second 

 tarsal segment, not a single claw. The " Klaue " of the 

 pala? of various CorixcB mentioned and figured by Fieber (Bull. 

 Soc. Impdr. Moscou, xxi. (P partie) tab. x. fig. 9 &c., 1848) 

 seems to me to be only a rather stiff palal bristle. 



Long. 6*2-7'3 millim. ; lat. pronot. 2*4-3 millim. ; lat. 

 max. hemiel. 3*5 millim. 



Launceston (Tasmania) and Melbourne (Victoria) : British 

 Museum. 



CORIXA, Geoff. 

 2. Corixa eurynome^ sp. n. 



Corixce atomarice, Ilb'ger, remote affinis ; capita fere rectangular!, 

 ociilorum marginibus lateraHbus interioribus fere perpendioulari- 

 bus capitis ad basin ; pronoto hemieljtrisque nou rastratis, 

 punctatissimis ; pronoto subacutangulato ; tibiis uuguiculisque 

 intermediis subaequalibus, tarsis lougioribus. 



S . Faciei impressione fere ad verticetn attingente ; palis anguste 

 cultratis. Strigili minutissima, subquadrata, dentium seriebus 

 latis quattuor instructis. 



$ . Faciei impressione labioque ovoidem formantibus ; palis an- 

 guste cultratis. 



Very different from any other described Corixa, in appear- 

 ance not unlike C. atomaria, Illiger, superficially. 



Shining ; head almost rectangular, pale testaceous, interior 

 lateral margins of the eyes almost perpendicular to the base 

 of the head. 



Pronotal angles rounded, subacute. 



Pronotum and hemielylra sordid testaceous, more or less 

 infuscated, densely furnished Avith black punctuations, not 

 rastrate ; no pronotal or hemielytral guttulate or vermiculate 

 lineations, although the regular and dense punctuation gives 

 the appearance of narrow black lines ; hemielytra paler at the 

 base (owing to absence of punctuation), covered with short 

 pale hairs. 



Meso- and metanotum black ; mesosternum medianly black. 

 Ventral aspect of abdomen and pedes (including coxse) 

 flavo-testaceous ; intermediate tibiee rather longer than 

 unguiculi, which are much longer than the tarsi. 



(J • Facial impression reaching almost to the vertex ; 

 dorsal aspect of head rather longer than in female, not longi- 



