100 



RECORDS OF THE AUSTRALIAN MUSEUM. 



Entire, there being no division between 

 the thoracic and abdominal segments. 

 Maxillary Palpi. — Five-jointed, hairy. 

 Eyes. — Four, simple, close together 

 upon an eye-plate,arranged in pairs, one 

 eye in front of the other. Gpuital 

 Opening. — Midway between the pos- 

 terior coxfe. Leys. — Arising close to- 

 gether on anterior part of venter, and 

 in a radiate arrangement ; they are 

 not strong, but are of moderate length, 

 and are provided with swimming 

 hairs ; the fourth pair is somewhat 

 the longest. Coxal or Ejnmeral Plates. 



— Four, united to the venter. Length of body 3-5 mm., breadth 



2-7 mm. ; some specimens rather smaller. 



Hah. — Parramatta, June, 1905, in ponds. 



Ohs. — I have named this species in honour of Mr. A. R. 

 McCulloch, of the Australian Museum, who at my request and 

 some personal inconvenience to himself, collected this and other 

 material for me. 



Fig. 36. 

 E. maccuUochi, Rainb. 



Genus Hydrachna, Mull. 



HyDRACHNA ODONTOfiNATHUS, Canest. 



Hydrachna odontocjnathas, Canest., Atti. 1st. Venet., (6), ii., 18S5, 

 p. 719. 



Host. — A water beetle. * 



Hah. — Australia. 



Fig. 37. 

 jd. cumherlandensi", Eainb. 



Genus Atax, Fah. 



Atax cumberlandensis, sp. nor. 



(Fig. 37). 



Body bluish-green ; legs green ; 

 elliptical, strongly arched, moutli- 

 parts hidden under anterior mar- 

 gin of cephalothorax. Maxillary 

 Paljyi. — Enlarged at base, fourth 

 joint bearing three spurs below. 

 Eyes. — Two, simple, widely aj^art. 

 Body. — Entire, integument smooth 

 with a finely impressed median 

 longitudinal mark, wavy in out- 



