508 ON AUSTRALIAN ANTHICIDAE, 



FORMICOMUS ACUTIDENS, n.Sp. 



<S. Black; basal joints of antennae obscurely reddish, coxae and base of 

 femora flavous. 



Head subglobular; with crowded but fairly sharply defined punctures about 

 base, but less distinct in front, owing- to the intermixture of smaller ones. Eyes 

 rather small, medio-lateral and prominent. Antennae slightly thickened towards 

 apex. P'rothorax distinctly longer than wide, front two-thirds globular, tho 

 basal third much narrower; with a few inconspicuous punctures along middle; 

 median line very faint. Elytra elliptic-ovate, sides somewhat dilated to middle, 

 shoulders fairly prominent; punctures sparse and minute. Abdomen with inter- 

 coxal process rather wide and gently rounded, apical segment irregular on each 

 side of and depressed in middle. Femora strongly clavate, front pair each with 

 a long and acute median tooth; front tibiae notched near apex, hind tibiae long, 

 thin and rather strongly curved. Length, 3 mm. 



Hah. — Queensland: Cairns District (A. M. Lea). 



The presence of wings, strongly dentate front femora of male, and shoulders 

 not completely rounded ofl:, associate this species with the preceding, and with 

 F. agilis, from whidh' it is at once distinguished by the absence of a flavous fascia 

 in a sub-basal depression on the elytra; the hind tibiae are also decidedly longer 

 and more strongly curved than on those species and the cephalic punctures are 

 different; in its scarcely visible median line it is neai-er the precpiling species 

 than agilis, but its femoral tooth is an acute spine, 



FORMICOMUS ALATUS, n.Sp. 



Black, shining; parts of three basal joints of antennae, parts of femora, of 

 tarsi and of palpi more or less reddish. With fairly numerous, dark, erect haii-s, 

 mixed on -the elytra with sparee, pale pubescence. 



Head subovate, hind angles and base completely rounded off; with rather 

 sparse and small, fcut sharply defined punctures, becoming larger and somewhat 

 crowded in and about some frontal impressions. Eyes prominent, medio-lateral 

 and rather large. Antennae long. Prothorax longer than wide, sides strongly 

 rounded and widest near apex, notched near base: upper surface with rather 

 dense and sharply defined but asperate punctures, flanks almost impunctate. 

 Elytra much wider than prothorax, sides of base oblique to shouldei-s, sides gently 

 dilated to beyond middle; punctures sparse and minute. Intercoxal process of 

 abdomen not very wide and gently rounded (almost truncate). Femora stout, 

 the hind ones strongly clavate. Length, 3.5 mm. 



Hab. — Queensland: Cooktown (H. Hacker), Darnley Island (H. Elgner). 



A deep black, winged species, evidently allied to F. obtusidens and F. 

 acutidens; each of the two specimens under examination is a female; they differ 

 from the females of the former species in having the elytra of uniform colour, 

 and no joint of antennae transverse (even the tenth is slightly longer than its 

 apical width), from the latter species (apart from ■ differences which are certainly 

 sexual) in having the head larger, with much sparser punctures, the prothorax 

 with much denser and coarser punctures, and the elytra without a postmedian 

 fascia of pubescence. 



TOMODERUS UXIFORMIS, n.Sp. 



Flavous. Moderately clothed with depressed, pale pubescence, interspersed 

 with some suberect setae. 



