541 



acute, prothoracic punctures less sharply defined, etc. If not 

 to Group 10, it could only be referred to Group 9, and with 

 the only species frothei) there noted, it has scarcely anything 

 in common. In general appearance it is like some specimens 

 of picipennis , which has very different clypeus, etc., and some 

 of gracilipes, which has abdomen of male bifasciculate, etc. The 

 male has the clypeus rather more acutely tridentate and the 

 abdomen with more uniform clothing than on the female, 

 but the external sexual differences are but slight. The upper- 

 surface is feebly iridescent, and the hind parts are usually 

 slightly pruinose, the elytra are usually a very dingy brown, 

 becoming almost black at the base and suture, but on an 

 occasional specimen they are paler (dingy castaneous-brown), 

 the front legs are almost wholly castaneous, the whole of the 

 abdomen is usually black, but is sometimes (occasionally only 

 the hind parts) obscurely diluted with red ; the propygidium 

 has a few scattered hairs (but these are easily abraded), and 

 there are usually a few at the tip of the pygidium. The clypeal 

 suture is conspicuously bisinuate, and a very narrow space 

 immediately behind it is shining and impunctate. The elytra 

 are terminated by a narrow but conspicuous membrane, but 

 on two (of the fourteen) specimens in the Museum only 

 remnants of it are left. 



LlPARETRUS NUDUS, 11. Sp. 



PI. xxxvii., fig. 127. 



Black; eltyra (base, suture, and margins infuscated) and 

 appendages (femora mostly black and club infuscated) reddish- 

 castaneous. Under-surface and legs rather sparsely clothed, 

 hind parts and upper-surface glabrous, except for a feeble 

 fringe on each side of pronotum. 



Head with dense and small punctures, much the same 

 on clypeus as between the eyes, but immediately behind the 

 clypeal suture a fairly wide, shining, impunctate space ; 

 clypeus with margins rather lightly elevated, sides rather 

 strongly rounded, apex moderately incurved to middle. 

 Antennae nine-jointed. Prothorax with sides rather strongly 

 produced ; hind angles widely rounded off, feebly produced 

 and almost rectangular, median line faint ; punctures rather 

 small, sharply denned and not very dense, smaller and more 

 numerous on sides than on middle. Elytra short ; with rather 

 large but not very dense punctures, geminate-striae well- 

 defined; with a short but conspicuous apical membrane. Hind 

 parts with dense punctures, slightly larger than on pronotum. 

 Front tibiae strongly tridentate; basal joint of hind tarsi 

 conspicuously longer than second. Length, 6| mm. 



