521 ON AUSTRALIAN DERMESTIDAE. PART II. THE GENl'S TROGODERMA BERTIIOM). By J. W. T. Armstrong. [Read 21st October, 1942.] Twenty-eight Australian species have already been described as belonging to the genus Trogoderma: twenty by Blackburn, three by Arrow, two each by Erichson and Lea, and one by Reitter. Of these, Blackburn himself noted that his T. baldien.se probably was the same as T. apicipenne Reitt., and this I believe to be correct. One of Arrow's species, T. pectinifer, is the insect previously described by Macleay as Megatoma apicaliH, and thus becomes Trogoderma apicalis Macl. Blackburn evidently did not know this species. T. sociuni Lea was originally described as an Anthrenus. Fifteen new species are described herein, bringing the total number of Australian species to forty-two. Of these, the only species I am sure I have not seen is T. consors Arrow. In the following tabulation, the aim has been to use, as much as possible, characters which do not necessitate removing specimens from their cards. The shape of the prosternal sulci is frequently obscured by the antennae, and is therefore not a suitable character for use in a tabulation, the purpose of which is to make the preliminary determination as easy as possible. I have found it necessary to depend on the character of the male antennal club more than seems advisable, as this renders the tabulation defective in regard to females. T. whitei, n. sp. is not very noticeably bicolorous, but its natural place is beside T. tolarnense Blackb. T. liobartense, n. sp. should perhaps be placed in the bicolorous section on account of the rufescent apex to the elytra, but this is only apparent on critical examination. Tabulation of Australian Species of the Genus Trogoderma. A. Elytra separately rounded ; not completely covering body. B. Pronotum strongly marg-inate ; form narrow marginicoUe , n. sp. BB. Not as above. C. Colour mainly black. D. Antennae of cT pectinate apicalis Macl. = pectinifer Arrow^ DD. Antennae of d serrate consors Arrow CC. Colour mainly ferruginous occidentale Blackb. AA. Elytra not separately rounded ; completely covering body. B. Unicolorous (excepting antennae and legs), or almost so. (Some of the species have the elytra somewhat paler, but not in any degree contrasting with the main colour, or bicolorous in themselves.) C. Very small, not more than 2 mm. long. D. Elytra devoid of erect setae or pubescence ; clothing short and depressed. E. Antennal club 5-segmented ; size .smaller parvum, n. sp. EE. Antennal club 3-segmented ; size larger exsul Blackb. DD. Elytra normally clothed lindetise Blackb. CC. Length more than 2 mm. D. Antennal club of d" 8-segmented. E. Colour fuscous ; puncturation fine. F. Elytra narrowing from shoulders ; size larger laevipenne, n. sp. FF. Elytra, if anything, widening from shoulders ; size smaller . . explanaticolle, n. sp. EE. Colour black ; puncturation coarse maurulum Blackb. DD. Antennal club of d" 7-segmented. E. Legs testaceous. F. Size larger ; form broader liohartense, n. sp. PF. Size smaller ; form narrower ellipticum, n. sp.