138 Mr. Arthur M. Lea's Revision of the 



10th, but slightly shorter than 9th. Prothorax twice as wide as 

 long, apex slightly wider than base, sides rounded but not quite 

 regularly so ; witli submarginal punctures. Elytra densely and 

 rather coarsely punctate, the punctures nowhere confluent but con- 

 nected in places by feeble transverse ridges. 

 Length 2| mm. 



Hah. Queensland : Cairns (type in Macleay Museum). 



Owing to shrinkage the abdomen cannot be satisfactorily 

 examined, but the penultimate segment is apparently 

 semicircularly excised as in the males of other species. 

 Its small size and bicoloured elytra will readily distinguish 

 it from ficsicornis and McDonaldi, the two previously 

 described species having the 9th joint inflated. 



Heteromastix flavifrons, n. sp, {Figs. 44, 45, 46.) 



^ . Black ; muzzle, prothorax, two basal joints of antennae and 

 lower surface of 3rd, front legs (tarsi excepted), parts of four hind 

 coxae, of femora and of tiliiae tlavous or almost so. 



Head convex, with several very indistinct impressions. Antennae 

 stout, moderately long ; 3rd-9tli joints triangular, 10th produced at 

 one side of apex, 11th considerably longer than 10th. and constricted 

 on one side. Prothorax twice as wide as long, sides regularly 

 rounded. Elytra densely and rugosely but not coarsely punctate ; 

 with traces of feeble raised lines. Penultimate segment of abdomen 

 deeply excised but not quite to base, the preceding segment widely 

 and rather deeply emarginate. 



Length 5-6 mm. 



5. Differs in having the antennae shorter, 11th joint simple 

 although longer than lOtli ; the prothorax somewhat wider, and the 

 abdomen simple. 



Hah. N. S. Wales : Armidale ( W. W. Froggatt). 



Tlie 11th joint of the male from one direction appears 

 to be of an elongated reniform shape and almost as wide 

 as the 10th joint; from another direction it appears to be 

 much narrower and almost lanceolate. In this (as in 

 many other) species, on each side of the prothorax at the 

 base, there may often be seen a small tuft of pubescence 

 (never distinct, however), which occasionally causes the 

 posterior angles to appear acute. The elytral sculpture is 

 not quite so coarse as in gagaticeps ; from which species it 

 also differs in having the muzzle pallid and 11th joint of 

 different shape. 



