84 



The sides of the prothorax are much as those of II. 

 penicillatus ; but the head and knees are black; the sides are 

 intermediate between those of the species of the pauxillus (F) 

 and pusillus (FF) groups of my table, in H . amabilis the 

 angulation is slightly more pronounced, the third and fourth 

 joints of its antennae are thinner, and the knees are pale; 

 II. simplex is smaller, with much shorter antennae, more 

 distinct elytral punctures and pale knees; II. pauxillus, which 

 it closely resembles in size and colour, has decidedly thinner 

 antennae, and sides and front angles of prothorax different ; 

 there are a few submarginal punctures on the prothorax, 

 but they are much less distinct than on H . victor iensis, 

 which also has the sides of the prothorax evenly rounded, 

 knees (on the typical form) paler than the adjacent parts, 

 and elytra] punctures much more sharply defined. 



Heteromastix serraticornis, n. sp. 



d . Black; prothorax, part of under-surface of head, 

 two basal joints of antennae, and part of the third, and legs 

 (tarsi and parts of tibiae infuscated) flavous. With short 

 pubescence. 



Head gently depressed in front. Antennae moderately 

 long, rather thin, third to tenth joints slightly serrated on 

 one side. Prothorax less than twice as wide as long, margined 

 throughout, lateral margins slightly and evenly rounded and 

 slightly thickened near apex; with submarginal punctures. 

 Elytra slightly wider near apex than at base; with crowded 

 and small rugose punctures. Length ( 6 , Q), 4*5-6 mm. 



9 . Differs in having the head smaller, antennae about 

 one-third shorter and not serrated, prothorax with margins 

 nowhere thickened, and in the abdomen. 



Hah. — New South Wales: Brindabella (Blackburn's 

 collection), Jindabyne, in January, and Sydney (H. J. 

 Carter). Type, I. 11876. 



On each of three males and five females the tips of the 

 front tibiae, half of the middle and three-fourths of the hind 

 ones are infuscated ; on one of the males the base of the hind 

 femora and hind coxae are infuscated, and on two of the 

 females the middle and hind femora are deeply infuscated 

 in parts. The serration of the antennae of the male is 

 slight, but quite distinct from some directions; in H. 

 pauxillus they are not serrated, on the female of the present 

 species they are also not serrated, but they are scarcely half 

 the length of those of that species, which is also narrower 

 and with darker legs; //. simplex has shorter and non- 

 serrated antennae, elytral punctures more distinct, and more 



