246 zeck. 



Ectrephes formiearum Pascoe. 

 Plate xix., fig. 1. 



Colour, yellowish Lea remarks of this species that "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 prothorax and elytra, but on floating it off for examina- 

 tion most of the hairs were lost. " 



Of this species I have two carded specimens before me, received from Mr 

 Clark. One specimen is quite glabrous, but on the other specimen there are num- 

 erous hairs, scattered about the prothorax, arising from the punctures, and along 

 each alternate row of small punctures on the elytra I am able to trace a low of 

 hairs. It would seem probable both from Mr. Lea's observations, and my own, 

 that on an entirely undamaged specimen the hairs would extend over the entire 

 pitted surface of the prothorax, but, not having seen other specimens, I have only 

 figured the scattered hairs. 



Hah. — Western Australia. Swan River. Taken in abundance by Mr. J S. 

 Clark in the nests of Iridomyrmex conifera, and one specimen from the nest of 

 Ectatomma metallieum. 



Length variable, 1.25 — 2.25 mm. 



Genus Polyplocotes Westwood. 



P. carinaticeps Lea. Trans. Roy. Soc. S. Aust., xliii., 1919, p. 254, PI. xxv., tig 39. 



Polyplocotes carinaticeps Lea. 



Plate xix., tig. 3. 



Castaneous. Elytra, abdomen and tip of antennae somewhat paler than other 

 parts. Glabrous. 



In the description of this species, Lea says, "Elytra subovate, base truncate, 

 ;.nd very little wider than prothorax, with regular rows of distinct and rather 

 small punctures." "Legs rather long and thin." 



The specimen figured (Fig. 3) is one of two on a card, and has numerous small 

 hairs on the dorsal surface of the prothorax, some extending down towards the 

 excavation. Some few hairs are also noticeable on the elytra near the base. 



The antennae at first appear to be but eight jointed, but the two apical ones 

 are so (dose together that it is difficult to see the dividing line. 



Hub. — Western Australia, Swan River. Taken by Mr. J. S. Clark in the 

 nests of Creniustogaster conifera. 



Length 1.5 mm. 



In describing the type, Lea also remarks that — "This species might have been 

 regarded as belonging to a new genus, but if true incjuilines were to be treated as 

 ordinary Coleoptera, it would be necessary to propose almost as many genera as 

 there are species." 



FAMILY COLYDIIDAE. 



Genus Euclarkia Lea. 

 E. costata Lea, Tram. Binj. Soc. S. Aust., xliii., 1919, p. 180, PI. xxv., fig. Ill 

 Euclarkia costata Lea. 

 Plate xix., fig. 5. 

 These beetles vary in colour from a dingy black to a brown. In his descrip- 

 tion of the genus. Lea says — "This remarkable genus is clearly allied to Ker- 

 shawia, and in general appearance the species described below quite strongly re- 

 sembles K. rugiceps on a small scale; with antennae removed there is no strong 



