BY A. M. LEA. 501 



rounded near apex, where the width is equal to that of head across eyes, 

 strongly narrowed to and notched near base; with sharply defliied 

 and fairly numerous ijunctures, but nowhere crowded. Elytra rather 

 lelongate, shoulders gently rounded, the width across them not much more than 

 widest part • of prothorax, sides gently dilated to middle ; with numerous, but not 

 crowded, sharply defined punctures of moderate size, becoming smaller posteriorly, 

 but distinct even at apex. Abdomen with intercoxal process narrow and acutely 

 triangular; apical segment with a fairly deep medio-apical incurvature. Hind 

 tibiae rather long, apical two-thirds slightly incurved on one side. Length, 2.5 — 

 3 mm. 



?. Differs in having the head smaller, antennae shorter and thinner, abdomen 

 more evenly convex and larger, the tip not at all incurved, legs shorter, hind 

 tibiae straight and front tarsi narrower. 



Rah. — Queensland: Caims District (Blackburn's collection and A. M. Lea), 

 Townsville (F. E. Wilson from G. P. Hill), Bundaberg. 



As with most members of the A. brevicollis gTOup the markings are very 

 variable, the elytra are rather long for a member of that group, but the head, 

 with its large eyes, and the short prothorax are normal. From most directions 

 the head appears to be quite straight or gently rounded at the base, but from 

 some a very feeble median incuirature (it could not be regarded as a notch) 

 may be traced. The darker males have the head (muzzle obscurely reddish), pro- 

 thorax (base obscurely reddish), and elytra (four flavous spots excepted) vary- 

 ing from dark reddish-brown to black; the abdomen (partly or entirely), parts 

 of the leg-s, and from five to seven apical joints of antennae more or less deeply 

 infuscat-ed; such dark males are more abundant than the other forms, and have 

 two flavous triangular humeral spots distinctly separated from the suture by a 

 triangular extension of the dark basal portion, and two obliquely transverse spots^ 

 at the apical third, not quite meeting at the suture; on other specimens the pale 

 spots gradually enlarge till the two humeral ones become a wide sub-basal fascia, 

 scarcely or not at all inten'upted at the suture, and the postmedian spots are 

 dilated (but still separated at the suture) so that there is left a fairly wide black 

 median fascia; on other specimens the pale portions are still more enlarged, till 

 the basal infuscation almost vanishes, the black median fascia is reduced to two 

 suboval spots, rather distant from the suture, and an apical infuscation (some- 

 times very faint). The females also vary gTcatly in colour but usually have the 

 pale elytral spots enlarged to rather wide fasciae, of which the postmedian one 

 is usually narrowly interrupted at the suture, but the other is continuous. Eight 

 females that I cannot disting-uish structurally from others that certainly belong 

 to this species, have most of the under surface blackish, the prothorax reddish- 

 eastaneous, with the apex slightly infuscated, and the elytra pale except for an 

 apical spot and a triangular infuscation about the scutellum; but many of the 

 females having no distinctive features of the legs and abdomen, can scarcely be 

 distinguished from females of other species ; and by their colour and markings 

 alone, many males cannot be distinguished from other species. The hind tibiae 

 of the male from one direction appear to be moderately wide and straight, but 

 from another they appear to be thinner, with the inner side of the apical two- 

 thirds slightly but distinctly incurved to the middle, and more or less blackish 

 there; on A. brevicollis and A. crassipes the incurvature is much more evident 

 (it commences as a sudden notch) and the whole tibia has an outward curve. 

 The punctures of the head and prothorax are much sparser than on A. discoideus 

 and A. haudinensis ; the elytra of the male are not opaciue, as in A. crassus; tke 



