On Two new Jevhua-rats. 315 



widest hasally ; %n-CH immediately beyond the fork ot' M, so 

 the basal seetion of M^ is almost lackiii}^; petiole of eell M^ 

 equal to or a little shorter ihau the second seetiou of M^j^^ 

 and in alininnent with it; cell 2nd A l)road. 



Abdomen with the basal tergite dark brown; remaining 

 termites black; sternites obscure yellow, segments G to l> 

 and the caudal margin of 5 infuscated. Male hyjjopygium 

 inverted as in the genus, the ninth tergite octiupying a 

 ventral position, ecMisisting of two rounded black lobes that, 

 are separated by a dee[) U-shaped notch. 



Hah. New Zealand (Nortii Island). 



lloloti/po, c^jOhakune, altitude 20G0 feet, October 10, 

 1921 ('/'. R. Harris). 



XXXIX. — Tloo new Jerboa-rats (Notorays). 

 By OLuriELD Thomas. 



(Published by permission of the Trustees of the British Museum.) 



Among the mammals collected by the late Mr. W. Stalker 

 in the neighbourhood of Alexandria, Northern Territory oi 

 Australia, is a nice series of a jerboa-rat from Ahoy, winch 

 in my account of the collection was recorded as Aulonii/s 

 initchelli* — a determination which was accepted in my recent 

 notes on the genus Notom^sf. 



There appeared, however, to be some doubt as to what the 

 true Notomys mitchelli of the Lower Munay liiver was, and 

 I appealed to Air. Troughton at Sydney for information 

 about the type, while iu the meantime the cluiracters of the 

 species were drawn up from the Alroy series. 



Mr. Troughton now tells me that he has examined the 

 incisors of the original specimens of " Dipas mitchtlU" and 

 finds that they are distinctly orthodont, not opisthodont as 

 in our northern specimens and as stated in my description of 

 the species. 



Since writing the pa})er on Kvto)nys, I have had lent me 

 by the Liverpool Museum a nund)er of Australian Aiuridie 

 received by them from Mr. Gould, ami among these there 

 are two jerboa-rats (nos. 246 and 24G a) fronr the (Jravvier 



• P. Z. S. 1906, p. 539. 



t Ami. & Mag. Nat. Hist. (9) viii. p. o3G (1921). 



21* 



