758 NEW SPECIES OF AUSTRALIAN COLEOPTERA, 



apical portion of elytra very obscurely diluted with red. The 

 punctures are dense and rather fine throughout. 



Orchesia minima, n.sp. 



Black with a distinct metallic gloss, parts of appendages 

 obscurely diluted with red. Clothed with very short pubes- 

 cence. Length, 1^ mm. 



Hub. — Tasmania: Mount Wellington; a single specimen from 

 moss (A. M. Lea) . 



The smallest species of the family known to occur in Aus- 

 tralia; in general appearance it is like a very small specimen 

 of 0. minuta, but with shorter pubescence, and proportions of 

 the elytra and hind tibiae as in 0. wellingtoniana; from the 

 latter it differs in its smaller size, somewhat metallic lustre, 

 punctures more distinct, and prothorax without subbasal de- 

 pressions. 



Table of Species of Orc/iesia. 

 A. Derm of elytra uniformly coloured or almost so. 



a. Derm more or less blackish. 



b. Without metallic gloss wellingtoniana. 



bb. With metallic gloss. 



c. Elytral clothing excessively short (scarcely visible 



under a Coddington lens) minima. 



cc. Elytral clothing longer than in c minuta. 



aa. Derm more or less castaneous* 



d. Elytral pubescence waved calotricha. 



dd. Elytral pubescence uniformly disposed. 



e. Length h\ mm. or more macleayi. 



ee. Length 4 mm. or less austrina 



AA. Derm of elytra with conspicuous markings. 



b. Markings rendered very conspicuous by clothing mnltinotata. 

 bb. Markings distinct in themselves. 



c. Elytra with a wide median flavous patch ... medioflava. 

 cc. Elytra with two zig-zag pale fasciae. f 



f. Pronotum with a depression towards each side eucalypti. 



ff. Pronotum without such depressions pictipenuis. 



ccc. Elytra with three zig-zag dark fasciae. 



d. Pronotum with a large semidouble infuscate 



blotch bryophila. 



dd. Pronotum immaculate viacilenta. 



* On some specimens of O. austrina the derm is somewhat blackish, 

 but such specimens are always larger than those of a. 



f Some specimens of O. pictipennis have the markings less conspicuous 

 than on the typical form. 



