248 



strongly dilated to apex, subsutural striae distinct; punctures 

 at base as on prothorax, sparser but quite distinct elsewhere. 

 Upper-surface of abdomen with a large basal excavation, 

 towards each side of which are two oblique lightly elevated 

 ridges, excavation shallowly encroaching upon convex por- 

 tion ; under-surface obliquely strigose about base, about apex 

 with a small fovea, overhanging which is the pygidium armed 

 with two short stout teeth. Metasternum with a narrow ridge 

 from base to just beyond the middle, where it terminates in a 

 small conical tubercle. Front tibiae lightly curved on upper- 

 surface, lightly bisinuate on lower-surface, and terminating 

 in a hook; middle pair with a shallow subapical notch, the 

 apex hooked; hind pair rather thin at base, moderately 

 dilated to middle, and then almost parallel to apex. Length, 

 2\ mm. 



Hab. — Queensland: Stewart River, taken in a nest of 

 the same host-ant as that of the preceding species (W. D. 

 Dodd). Type (unique), I. 8537. 



With many of the remarkable features of the male of 

 the preceding species, but antennae considerably longer, 

 entirely dark, and more strongly curved, apex (although quite 

 as wide) not so suddenly inflated, ridge of metasternum com- 

 mencing nearer the base, more acutely pointed and not over- 

 hanging the abdomen, apical spines of abdomen stouter, hind 

 femora stouter, and with a very conspicuous oblique ridge of 

 golden setae, front tibiae less dilated near apex and with a 

 slight notch, hind pair different, and abdominal fascicles 

 different. The under-surface of the apical half of the 

 antennae has a granulated appearance, and from some direc- 

 tions each appears to be finely but deeply constricted at the 

 basal third. 



Articerus bispinosus, n. sp. 



cS . Bright reddish-castaneous. Moderately clothed with 

 depressed, golden pubscence, becoming longer and more 

 irregular on upper-surface of abdomen, near base on each side 

 of abdomen with a semi-double fascicle; under-surface rather 

 sparsely clothed. 



Head rather short, with a fine median impression, and 

 with fairly conspicuous punctures. Antennae moderately 

 long, cylindrical in section, thin at the base, thence almost 

 evenly dilated to near apex, but more rapidly (although not 

 strongly) about apex; with numerous small granules. Pro- 

 thorax lightly transverse, front angles rounded off ; with a 

 round and conspicuous but not very deep medio-basal fovea; 

 punctures as on head. Elytra rather strongly dilated to apex, 

 subsutural striae distinct; punctures not very dense or large 

 but distinct, becoming denser about base. "Upper-surface of 



