422 



Records of the S.A. Museum 



CunnamuUa (H. Hardcastle), Rockhampton (type locality) ; New South Wales: 

 Clarence River (A. M. Lea); Tasmania: George Town; Western Australia: 

 Albany (fide Kirk.) ; New Guinea (Mus. Genoa, fide Kirk.). 



KVW 



Fig. 371. Plea brunni; a, b and e, anterior, intermediate and posterior legs. 



The examples from which the above description is made are provisionally 

 referred to Kirkaldy 's species ; they agree well with the original description, 

 excepting in the proportions of the intermediate legs. Kirkald}^ writes: 

 "Mittelschienen ein drittel langer als die Tarsen, erstes Tarsalsegment ein drittel 

 langer als das zwiete." 



These proportions apply to the posterior legs of the specimens before me, so, 

 in preference to risking the creation of useless synonymy, I have regarded these 

 limbs as the ones from which Kirkaldy 's measurements were taken. 



In the accompanying illustration of the insect, as seen from above, it will 

 be noted that the pronotum, owdng to its forward inclination, is foreshortened ; 

 its length can be more accurately gauged by a reference to the profile view. 



A careful search for members of this genus in South Australia has resulted 

 in the capture of the above species in two localities. 



Family CORIXIDAE. 



(This publication, ii, 1922, p. 309.) 



In addition to the asymmetrical abdomen, three other male characters are 

 developed in several Corixid genera ; these are the facial impression, the palal 

 stridulatory comb, and the strigil, all of which are utilized during copulation, 

 which is conducted underwater. Hungerford remarks that when Arctocorisa is 

 in cojyidd, "The pegs of the male palae make the embrace more secure, while the 



