256 



DiPHOBIA LONGICORNIS, n. sp. 



PL xxv., fig. 40. 



Castaneous, head and prothorax somewhat darker than 

 other parts. Upper-surface with sparse and short, semierect 

 setae. 



Head with small dense punctures; with a shallow median 

 line. Antennae long and thin, first joint rather stout, second 

 with its base curved under apex of first, third distinctly longer 

 than fourth, fifth-tenth moniliform, eleventh cylindrical, 

 about as long as three preceding combined. Prothorax 

 distinctly longer than wide, with a deep post-median transverse 

 impression, marked at its middle by a deep fovea and towards 

 each side by a smaller one; densely strigose. Elytra ovate, 

 strongly convex, base truncate, not much wider than pro- 

 thorax, and with six small deep foveae ; with rows of small 

 punctures, the interstices also punctate. Metasternum 

 shining, and with fairly large, asperate punctures. Abdomen 

 with small punctures in middle of two basal segments, 

 becoming larger and asperate at sides, and on the whole of 

 the third segment. Legs long and thin. Length, 

 175-2-25 mm. 



Hab.— Western Australia: Swan River, five specimens 

 from nests of the twig-mound ant, Iridomyrmex sp. (J. S. 

 Clark). Type, I. 10653. 



Readily distinguished from all other species of the genus 

 by the long terminal joint of the antennae. The sterna and 

 abdomen are glabrous. The femora are grooved throughout 

 their length, on the under-surface, for the reception of the 

 tibiae. 



ECTREPHES FORMICARUM, PaSC. 

 PI. xxv., figs. 41 and 42. 



Mr. Clark has taken this species, about the Swan River, 

 in abundance from nests of Iridomyrmex conifera, and one 

 specimen from a nest of the green-head ant (Ectatomma 

 metallicum). These vary in length from 1*25 to 2'25 mm. 

 Of the clothing Pascoe says ''elytris . . . pilis minutis 

 erectis valde dispersis." King (of its synonym Anapestus 

 kreusleri) says "sub lente setosus." The clothing seems to be 

 particularly liable to abrasion as most of the specimens before 

 me are almost or quite glabrous on the upper-surface ; on one 

 specimen there were numerous fairly long hairs on the pro- 

 thorax and elytra, but on floating it off for examination most 

 of the hairs were lost ; on three specimens there are still a 

 few hairs left on the upper-surface. The antennae look very 

 different from different points of view. 



