DESCRIPTIONS OF AUSTRALIAN EUMOLPINI. 27 



striate. Legs rather short and stout, femora unarmed, tibiae widened 

 posteriorly, entire, first joint of posterior tarsi about as long as the 

 following two together ; claws feebly appendiculate. First abdo- 

 minal segment as long, or nearly so, as the other segments together. 

 Prosternum very narrowly elongate, mesosternum oblong, slightly 

 broader. Anterior mai'gin of thoracic episternum concave. 



This genus, proposed for another very minute Eumolpid, 

 presents another of those transitionary forms so frequently found 

 in the Australian Continent, and almost impossible to place satis- 

 factorily in or near any other group. The structure of the head 

 and the long abdominal first segment are almost unique amongst 

 the Eumolpini, where the species is, moreover, one of the 

 smallest of this subfamily. 



Agetinella minuta, sp. nov. 



Fuscous, with pale elytral apex, or elytra entirely pale. Head 

 and thorax nearly black, antennae and legs fulvous. 



Head minutely granulate and impunctate ; antennae scarcely 

 extending to base of thorax, fulvous. Thorax nearly three times 

 broader than long, sculptured like the head, opaque, with some 

 extremely minute punctures at sides and base. Elytra not wider at 

 base than the thorax, finely and closely punctate-striate, the inter- 

 stices narrowly longitudinally costate and shining. Body beneath 

 nearly black ; legs fulvous, as well as apex of last abdominal segment. 

 Length, 1| mm. 



Hab. Swan River (Lea). 



Of the two specimens kindly sent by Mr. Lea, one has 

 the elytra testaceous, the other dark fuscous, with the apex 

 gradually getting paler. 



Platycolaspis, gen. nov. (Eumolpini). 



Body elongate, glabrous ; eyes entire ; antennae short, first and 

 second joints thickened, the following three joints thinner and longer, 

 the rest subtriangularly thickened, very short. Thorax nearly twice 

 as broad as long, with narrow flattened lateral margins, these sub- 

 angulately produced at the middle, the surface with a transverse 

 median sulcus ; scutellum narrowly oblong. Elytra not wider at the 

 base than the thorax, the sides very strongly deflexed, surface irregu- 

 larly punctured. Legs slender and elongate, femora unarmed, tibige 

 not emarginate at apex, tarsi short, nearly equal, subtriangular ; 

 claws appendiculate. Prosternum and mesosternum very narrow and 

 elongate ; the anterior margin of the thoracic episternum slightly 

 concave. 



This genus is proposed for the reception of a very small 

 species, which would enter the Eumolpid group of Cohispini of 

 Chapuis's arrangement ; from any of the genera placed in that 

 group the Australian genus is at once distinguished by the 

 short, submoniliform antennae, and the extremely narrow pro- 

 sternum and mesosternum. 



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