Australian and Tasmanian Malacodermidae. 145 

 Heteromastix nigripes, n. sp. 



^ . Black ; prothorax reddish-flavous. 



Head rather strongly convex. Antennae long and moderately 

 stout ; 2nd joint one-third the length of 3rd ; 11th about twice the 

 length of TOth and distinctly, although not very decidedly, con- 

 stricted at its middle. Prothorax twice as wide as long, sides 

 regularly rounded. Elytra very densely, rugosely and rather 

 coarsely punctate. Penultimate segment of abdomen semicircularly 

 excised. 



Length 4^ mm. 



$ . Differs in having shorter antennae, the 2nd joint of Avhich is 

 proportionately longer and the 11th shorter (although distinctly 

 longer than the 10th) and not constricted in middle, being in fact 

 slightly widest in front of the middle ; prothorax rather wider ; 

 legs shorter and abdomen simple. 



Hob. Tasmania : Lannceston, Beaconsfield, Karoola, 

 George Town, Denison Gorge, East Tamar, Zeehan, Huon 

 River, Hobart, Frankford, Mount Wellington {Aug. Simson, 

 E. H. D. Griffith and A. M. Lea). 



From the allied species, except latus, it can be readily 

 distinguished by the long and constricted terminal joint 

 of antennae in the male. The whole insect is larger and 

 the sides of the prothorax are different to those of per- 

 ahundans, in the company of which species it is frequently 

 taken. In the male the antennae are not much shorter 

 than the body. The elytral punctures are about as large 

 as in fusicornis but decidedly denser. As in a number 

 of other species the base of the prothorax is sometimes 

 stained with black. From victoriensis it differs in beins: 

 shorter, with shorter antennae, entirely black legs, less 

 coarsely punctate elytra and sides prothorax, which also 

 is without submarginal punctures. 



Heteromastix simplex, n. sp. 



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

 and two basal joints of antennae more or less flavous. 



Head strongly transverse ; eyes larger than usual. Antennae 

 moderately long and rather stout ; 2nd joint more than half the 

 length of 3rd, 11th about one-third longer than 10th. Prothorax 

 twice as wide as long, sides rounded except at extreme base ; with 

 indistinct submarginal punctures. Elytra densely, moderately 



TRANS. ENT, SOC. LOND. 1909. — PART I. (mAT) L 



