Notes on Australasian Rats. 425 



■with a dark dorso-central vitta wliicli is visible from almost 

 any angle. Legs yellow, tarsi black. Wings clear, veins 

 yellow basally. Calyptrse and halteres yellow. 



Frons slightly less than one-third of the head-width ; 

 orbits each with three supraorbital bristles and two infra- 

 orbitals ; cruciate interfrontals lacking ; parafacial at base 

 of antennae wider than the rather broad third antennal 

 segment ; longest hairs on arista distinctly longer than 

 width of third antennal segment; palpi narrow. Tliorax 

 with about three pairs of closely placed presutural acro- 

 stichals; prealar very long; sternopleurals 1:2. Fore 

 tibia with one anterodorsal and one posterior bristle well 

 apicad of middle ; basal segment of fore tarsus slender, as 

 long as next three, second, third^ and fourth segments 

 dilated^ of about equal width, fourth less than twice as long 

 as wide; mid-femur with two anterior, one antero-ventral, 

 and three postero-ventral bristles basad of middle ; mid-tibia 

 with one antero-dorsal, one postero-dorsal, and two posterior 

 bristles ; hind femur with six antero-ventral bristles, a wide 

 space between third and fonrth, and one or two postero- 

 ventral bristles ; hind tibia with one antero-vential, two 

 antero-dorsal, and two postero-dorsal bristles. Costal thorn 

 short ; last section of fourth vein not longer than preceding 

 section. 



Length 11 mm. 



7^y^;e, Lower Ranges, North Khasi Hills, Assam, 1878 

 (-4. Chennell). 



One female. 



The largest species of the genus known to me. 



XLI. — Notes on Australasian Rats, with a Selection of 

 Lectotypes of Australasian Muridee. By Ol.DFlELD 

 Thomas. 



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



While determining a rat from Mt. Compass, in the neigh- 

 bonrhood of Adelaide, sent to the British Mnscuni by 

 Prof. Wood Jones, I have had occasion to study tiie various 

 South- Australian species described by Grey and Gould, which 

 were l.-irgely based on the material sent home by Capt. (later 

 Sir) George Grey. 



These specimens have been somewhat indiscriminately 

 , labelled Mas (now to be called Rattus) fuscipes and greyij 



