Australian and Tasmanian Malacodermidae. 147 



insect itself is much wider, the elytra are less closely- 

 punctured, and parts of the legs and muzzle are pallid ; 

 the head also is distinctly more transverse and less convex. 

 I have numerous specimens of both species and seen side 

 by side they look very distinct. The elytra are wider than 

 in f/agaticeps, and the punctures are smaller and not quite 

 so dense. 



Heteromastix geniculatus, n. sp. 



^. Head, prothorax, scutelluni, base of 1st joint of antennae, 

 front coxae and all the knees flavous ; elsewhere black. 



Head less transverse and eyes larger than usual. Antennae long 

 and thin; 2nd joint less than half the length of 3rd, 11th just 

 perceptibly longer than 10th. Prothorax not twice as wide as long, 

 sides gradually dilated from base to near apex, but front angles 

 strongly rounded; disc rather strongly convex. Elytra distinctly 

 wider than base of prothorax ; densely, rugosely, but not coarsely 

 punctate. Penultimate segment semicircularly excised. Tarsi un- 

 usually thin. 



Length 6 mm. 



Rah. N. S. Wales : Burrawang {T. G. Sloane), National 

 Park, Sydney (A. M. Lea). 



There are one male and two female specimens before 

 me, the females being both smaller (5 mm.) than the male 

 and with shorter antennae and simple abdomen. In the 

 male the antennae are almost as long as the body. The 

 elytra from some directions appear to be covered with 

 small granules, but this appearance is deceptive. From 

 anticus* (the only other described species having both 

 the head pallid and antennae simple) it difters in being 

 larger with antennae and legs not entirely pallid, elytra 

 with denser and smaller punctures, prothorax narrower, etc. 



Heteromastix imitator, n. sp. 



(J. Black; prothorax, knees, trochanters and front coxae and 

 femora flavous ; tip of muzzle obscurely flavous, antennae (basal 

 joints flavous) tibiae and tarsi infuscate. 



* The antennae of the male of anticus are described as having the 

 3rd-5th joints somewhat dilated ; these joints, however, are not 

 distorted as in distortus, but are slightly wider than those preceding 

 or following them, and much as they are in many other species of 

 the genus. Mr. Blackburn has kindly presented me with a male of 

 anticus. 



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