ON COLEOPTEBA, MOSTLY FBOM QUEENSLAND. 341 
North Australia : Darwin (G. F. Hill). Type, in South Australian Museum : 
co type, in Queensland Museum. 
The pro thorax is more transverse than on T. placidus, and the antennae are 
shorter and more of apex of elytra is dark. The hind angles of prothorax, distinctly 
although not strongly produced outwards, distinguish from T . sulcatus ; rather 
more of apex of elytra is black, and the metasternum and legs vary somewhat in 
colour (as they also do on sulcatus). The flavous parts are the prothorax, scutellum, 
basal three-fifths of elytra, prosternum, mesosternum, coxae, and base of femora. 
Of four females three have the under parts coloured as on the male, on the other 
the metasternum is deeply infuscated. 
Two females, from Grooto Eylandt (N. B. Tindale), differ from the others 
in having the hind angles of the prothorax more produced outwards ; one of them 
has the metasternum flavous, on the other it is deeply infuscated. 
Trichalus sulcatus Waterh. 
Three specimens, from North Australia (Darwin and Melville Island), 
apparently belong to this species, but have the femora entirely pale (except that 
their tips are slightly infuscated) and tibiae partly pale. On one of them the under 
surface is pale, except that the tip of the abdomen is infuscated. On another the 
two basal segments only are infuscated at their tips ; these two specimens also have 
the three basal joints of antennae entirely pale and parts of the; following joints. 
( hi Queensland specimens of T. sulcatus, however, the under surface and legs vary 
in colour. On the third specimen the abdomen is blackish, except that the four 
basal segments are pale on each side. 
Heteromastix irregularis n. sp. 
cj. Flavous : head, fourth to eleventh joints of antennae and most of third, 
scutellum, apical fourth of elytra, metasternum, abdomen, and tarsi black or 
infuscated. 
Head shallowly depressed between, eyes. Third joint of antennae about as 
long as first, but much wider, produced on one side of apex, fourth longer and slightly 
wider than third and also produced on one side of apex, fifth about as long as fourth 
but narrower, dilated on one side of middle, the following joints narrow, cylindrical, 
and slightly decreasing in length, but the eleventh slightly longer than tenth. 
Prothorax at base about once and one-half as wide as the median length, sides evenly 
elevated and rounded ; without distinct punctures. Elytra about as wide as the 
widest part of prothorax : with dense and small, rugutose punctures. Abdominal 
notch distinct. Front tibiae with a small notch and spine at the inner apex, basal 
joint of front tarsi with an inner notch or curve. Length, 4-5-5-0 mm. 
5- Differs in having the head smaller and gently convex between eyes ; and 
antennae, abdomen, and front legs simple. 
Queensland : Brookfield, in October (H. Hacker). Types, in Queensland 
Museum. 
Only three species were previously known with the third to fifth joints of 
antennae distorted in male ; of these H. distortus has elytra entirely dark and tibiae 
partly infuscated : the figure of its antennae 2 will give a good general idea of that 
2 Lea, Trans. Ent. Soc. Lond., 1909, pi. iii, fig. 32. 
