114 



second slightly longer than third, the others subglobular. Prothorax 

 distinctly longer than wide, sides slightly rounded, base feebly 

 bisinuate and about one third wider than apex; apex feebly bilobed 

 and very feebly raised ; with a large shallow depression on each 

 side of middle, somewhat nearer base than apex; with dense but 

 normally concealed punctures. Elytra about one third wider than 

 prothorax, and scarcely thrice as long; with series of rather large 

 snbquadrate punctures; interstices flat, but distinctly raised above 

 series of punctures, and about the same width. Under surface 

 densely granulate-punctate, a shallow depression common to two 

 basal segments of abdomen in one sex. Femora more parallel-sided 

 than usual; four front ones each with a distinct but not very large 

 equilaterally triangular tooth, hind pair rather feebly dentate; tibiae 

 almost as wide as femora but more compressed. Length 4-4 1/4 mill. 



Hab. : Tasmania (Belgian Museum), Mount Barrow (in the nest 

 of a small black ant, H.-H.-D. Griffith), Huon River, Launceston 

 (under logs in damp situations, A.-M. Lea). 



The elytral setae, although usually erect, are so short that they 

 are distinct only from the sides. 



646. ISAX PLANIPENNIS n. sp. 



(^. Black, opaque; antenna3 and claw joints dull red, club darker. 

 Moderately densely clothed with muddy-grey scales, longer on 

 prothorax (where they are subsetose) than on elytra; elytra with 

 feeble fascicles of blackish scales. Under surface with clothing 

 varying from sooty to pale fawn. Basal third of rostrum gquamose. 



Head with ocular fovea indistinct. Eyes large, almost perfectly 

 circular. Rostrum long, thin, somewhat rounded, feebly curved, 

 shining; basal half with coarse punctures, causing three carinse to 

 appear, apical half with sparse punctures. Scape long, inserted 

 nearer apex than base of rostrum and passing apex; two basal joints 

 of funicle long, equal, their combined length more than that of the 

 others, seventh widely transverse, subaduate to club. Prothorax 

 transverse, somewhat flattened, apex tubular; from apex to middle 

 a slightly shining carina, thence to base a feeble depression; a 

 feeble depression on each side of base; densely and somewhat 

 absolutely punctate. Scutelliim small, scarsely raised, semicircular. 

 Elytra not thrice the length of prothorax and noticeably wider, disc 

 somewhat flattened; interstices wider than punctures, rather flat, 

 third and fifth feebly raised; suture not raised or granulate; seriate- 

 punctate, punctures large, round, more or less obscured by scales, 

 apex feebly emarginate. Side pieces of metasternum each with a row 



