Atistralian and Tasmanian Malacodcrmidac. 149 



In the male the basal joint of the antennae is almost 

 entirely pale, in the female it is pale only at the extreme 

 base. In the female specimen the mandibles are exposed, 

 are pale at the base and dark brown at the tip. In shape 

 it is almost identical with genicidatus, but its black head 

 at once distinguishes it from that species. From vicioricnsis 

 it is distinguished by the upturned front angles of prothorax 

 and absence of marginal punctures and by the much 

 smaller elytral punctures. From pavxilliLs it differs in 

 the much less transverse prothorax, with different anterior 

 angles, stouter antennae, bicoloured legs and much finer 

 elytral punctures. In the table it is placed beside ptisillus, 

 but it is much larger than that species ; the prothorax is 

 less transverse, antennae considerably longer, legs differently 

 coloured, etc. 



Heteromastix inflatus, n. sp. (Fig. 35.) 



(J . Black ; prothorax and basal half of elytra flavous ; trochanters 

 of a dingy brown. 



Head densely and minutely punctate, largely but indistinctly 

 impressed in front. Antennae rather long and thin, 3rd-6th joints 

 more or less distorted. Prothorax about twice as wide as long, sides 

 strongly reflexed, of equal width near base and apex. Elytra dilated 

 beyond the middle, each separately rounded at apex ; with dense, 

 rather small, subrugose punctures becoming very small towards 

 base. Penultimate section of abdomen triangularly excised almost 

 to base. 



Length 4|-6 mm. 



Hah. N. S. Wales : Gosford (K J. Carter). 



The elytra are distinctly inflated just beyond the middle 

 with their dark portion slightly advanced along the suture. 

 There are three males before me and the antennae (except 

 to a slight extent in degree) are alike in all ; the distorted 

 joints, however, alter their appearance with the point of 

 view. The 3rd is about the length of the 1st, slightly 

 curved inwardly and the apex produced obliquely out- 

 wards, the 4th is considerably shorter than the 3rd, slightly 

 inflated on one side and incurved on the other and feebly 

 produced at the apex (from another direction it appears to 

 be of equal width at base and apex, and feebly constricted 

 in the middle), the 5th is the largest joint of all, at its 

 base it is strongly produced (obtusely dentate) on one side, 

 with a corresponding depression on the other ; the 6th is 



