250 



With the general shape of austrina. Pygidium rather 

 long and very acute. Antennae long and thin. Hind tibiae 

 with very unequal spurs, the longer more than twice the 

 length of the other, with three oblique black ridges, the two 

 basal joints of the hind tarsi each with two ridges. Length, 

 4^-5^ mm. 



Rob. — Northern Territorv : Melville Island (W. D. 

 Dodd). Type, I. 5949. 



Rather close to austrina, but elytra more parallel-sided, 

 pygidium more acute, and ridges on hind legs different. From 

 the description of aspersa it differs in having the first joint 

 of the hind tarsi with but two ridges, and somewhat in the 

 colour and pubescence; the latter is very similar to the derm 

 on which it rests. There are three specimens in the Museum, 

 of which two are males and piceous-brown, with the muzzle, 

 sides of prothorax, and parts of hind legs obscurely diluted 

 with red, the other legs being paler ; the female is castaneous, 

 but with the under-surface and disc of pronotum somewhat 

 infuscated; the antennae of all three are blackish, but with 

 the basal joints paler. 



MORDELLISTENA ATRONITENS, n. sp. 



Black, with a conspicuous bluish iridescence; tip of 

 muzzle, palpi, base of antennae, front legs (wholly or in 

 part), and spurs of hind tibiae more or less reddish. 



Rather elongate. Scutellum small and semicircular. 

 Pygidium long and very thin. Antennae rather long and 

 thin. Hind tibiae with very unequal spurs, the longer about 

 twice the length of the other, with three oblique ridges. 

 Length, 3-3 J mm. 



Hab. — Queensland: Cairns district (F. P. Dodd and 

 Macleay Museum). Type, I. 5900. 



A black but beautifully iridescent species, differing from 

 the non-iridescent Western Australian concolor in its thinner 

 (almost hair-like) pygidium. The .pubescence is mostly black, 

 but on the head, base and apex of pronotum, base of elytra, 

 and parts of under-surface it is more or less greyish. Owing 

 to the colour of the hind tarsi I have not been able to see 

 their oblique ridges clearly, but there appear to be three on 

 the first joint and two on the second. 



MORDELLISTENA TRICHURA, n. sp. 



Black; spurs to hind tibiae obscurely flavous. W T ith black 

 pubescence, becoming greyish on parts of elytra and of 

 under-surface. 



Rather long and thin. Scutellum minute. Pygidium 

 long and very thin. Antennae long and thin. Hind tibiae 



