80 



gagaticeps, from which it differs in being smaller, legs entirely 

 dark, darker basal joints of antennae, with apical joints dif- 

 ferent, and elytral punctures coarser; from the preceding 

 species it differs also in being smaller, ninth and tenth joints 

 not notched near base, the tenth longer on one side than the 

 other, but not conspicuously produced there, and the eleventh 

 less strongly incurved on one side. It is the only species 

 known from Tasmania with the apical joints distorted. 



Heteromastix nigriceps, n. sp. 



d . Black and flavous. With short, pale pubescence. 



Head with two faint interocular impressions. Antennae 

 rather long and thin. Prothorax about twice as wide as long, 

 margined throughout, lateral margins somewhat wider and 

 .distinctly thickened near apex. Elytra parallel-sided to near 

 apex; with dense and small, but sharply defined punctures, 

 becoming very small at tips and base. Length (<$ , 9)> 

 3*5-4 mm. 



9 . Differs in having the head smaller, with smaller and 

 less prominent eyes, and shorter antennae. 



Hab. — Northern Queensland (Blackburn's collection), 

 €airns (Dr. E. W. Ferguson). Type, I. 12257. 



The black parts are the head (except mentum), meso- 

 sternum, metasternum, and abdomen; on some specimens some 

 of the antennal and tarsal joints, and the coxae, are rather 

 lightly infuscated, on others the legs and antennae are entirely 

 pale. On both sexes (there are two pairs taken in cop. before 

 me) the abdomen is notched, but the notch is much larger on 

 the male than on the female. In my table would be asso- 

 ciated with H . flavipennis, but is a much smaller species, with 

 finer punctures and prothoracic margins much as in H. 

 pusillus, to which it is structurally closer. 



Heteromastix denticollis, n. sp. 



3 . Flavous; head, metasternum, and abdomen blackish, 

 antennae (except some of the basal joints) deeply infuscated, 

 middle and hind coxae, parts of femora and of tarsi rather 

 lightly infuscated. With short, pale pubescence. 



Head with two vague interocular impressions. Antennae 

 long and thin. Prothorax at widest more than twice as wide 

 as long, with fine margins, but each side suddenly and strongly 

 dilated and thickened towards apex. Elytra loner, thin, and 

 almost parallel-sided to near apex; with dense and small, but 

 sharply defined punctures. Length, 3-3'25 mm. 



Hab. — Northern Queensland (Blackburn's collection). 

 'Type, I. 12261. 



