ON COLEOPTEEA, MOSTLY FROM QUEENSLAND. 
343 
becomes subconical. Prothorax about twice as long as wide, sides evenly elevated. 
Elytra parallel-sided to near apex ; with crowded and small, rugulose punctures. 
Abdomen with a distinct notch. Tibiae simple. Length, 4-5 mm. 
Differs in having the head slightly smaller, gently convex, antennae 
shorter and thinner, tenth joint not notched at apex, eleventh slightly shorter than 
the three preceding combined, with its tip pointed but not suddenly narrowed and 
conical, and abdomen not notched. 
Queensland : Brookfield, in October (H. Hacker). Types, in Queensland 
Museum. 
The eleventh joint of antennae of the male is different from that of all the 
species in which it is truly simple, but. as it is circular in cross-section throughout, 
the species can scarcely be regarded as belonging to the section in which it is distorted 
in the male. At first glance the antennae appear to be twelve- join ted, with the apical 
joint thinner and about one-fourth the length of the preceding one. The black parts 
are the head, antennae (except the two basal joints and part of the third), scutellum, 
apical two-fifths of elytra, metasternum, and abdomen ; the apical joints of the 
tarsi are also infuscated. The front tibiae are not dilated at the apex as on the male 
of H. tibialis , which is somewhat similarly coloured. It is larger than on H. nigri- 
ventris , with the head and more of the under surface black. 
Heteromastix flaviventris n. sp. 
(J. Black, prothorax and abdomen fiavous. 
Head with several feeble interocular impressions. Antennae rather stout, 
extending to tip of first segment of abdomen, joints feebly serrated, third slightly 
stouter and shorter than fourth, the others to tenth subequal in length but becoming 
slightly thinner, eleventh subcylindrical, about one-third longer than tenth. 
Pro thorax not quite twice as wide as long, sides evenly elevated. Elytra parallel- 
sided to near apex ; with dense and small, rugulose punctures. Abdomen with 
a deep apical notch. Length, 5-5-6-0 mm. 
New South Wales : Muswellbrook, in October (W. W. Eroggatt). Type, in 
South Australian Museum. 
Readily distinguished from the many species having the upper surface 
similarly coloured by the pale abdomen. 
Heteromastix decipiens Lea. 
Three specimens, recently taken near Sydney, evidently belong to this species. 
The female (hitherto unknown) differs from the male in having the two apical joints 
of antennae simple and abdomen not notched ; it is scarcely distinguishable from 
the female of H . gagaticeps , but the apical joint of antennae of the male is longer 
and thinner than on the male of that species, and its base is different. 
Heteromastix megalops Lea. 
A male from New South Wales (Mount Wilson) appears to represent a variety 
of this species. It differs from the type in being larger (4*5 mm.) and of the legs 
only the knees are paler, but it has the same large eyes and long antennae as on the 
type, and the prothoracic margins are as on H. pusillus. 
