314 



This species is very nearly allied to 0. multidens of Haase from 

 Celebes, but the colour is different, the antennae are longer, the 

 denticles of the coxal plates and of the basal tooth are much more 

 blunt and very ill-defined; moreover Dr. Haase makes no mention in 

 his description of any deep impression on the anal tergite. It also 

 appears to resemble 0. longicorne of Tömösvary from Borneo, but in 

 this species the antennae are much longer, being composed of 25 or 

 more segments. 



Rhysida. 



13. Rhysida immarginata (Porat). 



Sumatra: Singkarah. 

 Java: Buitenzorg. 

 Island of Saleyer. 



14. Rhysida carinulata (Haase). 



Celebes: Pare-Pare. 



15. Rhysida rugulosa sp. n. PI. XIX, fig. 6 — 6 a . 



Sumatra: Manindjau. A single specimen. 



Colour: upper surface bluish-green; under surface much paler; anal 

 legs bluish-green. 



Head-plate heart-shaped, slightly wider than long; antennae long, 

 extending to the hinder edge of the sixth tergite ; composed of seventeen 

 cylindrical segments whereof the basal three are bare and the rest 

 clothed with testaceous pubescence. 



Maxillary coxal plates wide, much wider than long, in contact in 

 the middle, anterior border of each convex and furnished with six ill- 

 defined teeth; basal tooth of the maxillipedes well-developed and sub- 

 dentate. 



Tergites from the third sulcate, from the sixth or seventh margi- 

 nate, except the first five or six laterally rugulose; at the posterior 

 end of the body much more strongly rugulose, with a low median 

 longitudinal carina, sub-carinate laterally and furnished with many 

 spinuliform, sub-serially arranged denticles. 



Sternites, wholly smooth, with two very short anterior sulci. 



Anal somite; tergite with an anterior low, median ridge, wider 

 behind than in front , with convex slightly produced posterior margin ; 

 pleurae finely and closely porous, somewhat strongly produced, with 

 a single postero-lateral spine, about half way between the apex and 



