DESCRIPTIONS OF NEW SPECIES OF AUSTRALIAN COLEOPTERA. XX. By Arthur M. Lea, F.E.S. (Eight Text-figures.) [Read 30th October, 1929.] Family Mordellidae. MORDELLISTENA CAIRNSENSIS, n. Sp. Black, in some lights with a bright bluish gloss, parts of antennae and of front legs obscurely diluted with red. With fine blackish and greyish pubescence. Rather thin. Aculeus rather long and thin. Antennae passing base of hind legs. Hind tibiae with four cuts, the second long, the others short, apical spurs very unequal; first and second tarsal joints obscurely notched. Length, 2 mm. Queensland: Cairns district (F. P. Dodd). Unique. A minute species, about the size of M. concolor, from Western Australia, but with griseous clothing in parts; M. atronitens is larger, not greyish, and in certain lights more brilliantly iridescent. At first glance it appears to be a Mordella, but the cuts on the hind legs are sufficiently distinct on close examina-tion, although partly concealed by pubescence. From most directions the head appears to be brilliant blue, with a darker central spot, the spot altering in position with the point of view, from the front to the back, but always along the middle. On the head, prothorax, legs and most of the under surface the pubescence is greyish-white, on the elytra it is mostly dark, but whitish on the suture and shoulders, with a faint V, usually traceable (even to the naked eye), but altering with the point of view? MobdellistejXA subpellucida, n. sp. Flavous, with a faint bluish gloss, tips of elytra slightly infuscated, cuts on hind legs and tips of some of the joints black. Clothed with fine, pale pubescence. Rather thin. Aculeus long and thin, rather suddenly dilated near base. Hind tibiae with three black cuts in addition to the black tip, the first short, second longer, third much longer; spurs very unequal; first and second joints of hind tarsi each with two conspicuous black cuts. Length, 3 mm. Queensland: Kuranda (F. P. Dodd). An unusually pale species, about one-third of the elytra appears to be infuscated; this is due mostly to the dark wings showing through, but on lifting an elytron it is seen to be really slightly infuscated posteriorly. It is paler than M. fusca. and is without the dark suture and shoulders of M. longipes. The pubescence nowhere forms patterns, but is fairly distinct; on the elytra a faint V, altering with the point of view, may usually be traced. Mordellistexa nitidicoma, n. sp. Bright castaneous, with a faint bluish iridescence; metasternum, hind coxae, and most of hind femora more or less deeply infuscated. Rather densely clothed with pale, golden-brown, shining pubescence. E
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