44:4 Mr. G. J. Arrow on the Oriental Members 



Dlchelomorpha assamensis, sp. n. 



Fusco-brunnea, opaca, supra ubique coriaceo-rugosa, setis brunneis 

 et griseis dense vestita, capite, pronoto partim, scutello, elytro- 

 rumque sutura et lineis tribus lougitudinalibus setis pallidis 

 ornatis ; modice elongata, capite brevi, clypeo lato, margine 

 arcuato, reflexo, prouoto longitudine parum latiori, lateribus 

 medio angulatis, antice et postice fere rectis, valde contractis ; 

 elytris 4-costatis, lateribus pone bumeros leviter dilatatis, deinde 

 paulo contractis, apicibus baud penicillatis ; pygidio corporeque 

 subtus ubique dense et sequaliter griseo-pubescentibus ; tibia 

 antica fortiter bidentata ; antennis tarsisque sat gracilibus, ungui- 

 bus minute fissis : 



J , brunnea, elytris griseo-lineatis : 



5 , grisea, elytris brunneo-lineatis. 



Long. 11-14 mm. ; lat. max. 5-7 mm. 



Assam : Silhet, Chandkhira. 



There are six males in the British Museum, and the 

 Brussels y\ useum contains a single female. It is the largest 

 species of the genus known to me. 



The upper surface is very densely clothed with velvety 

 pubescence, but a small patch near the base of the pronotum 

 on each side may be partly or entirely denuded. In the 

 male the brown pubescence predominates and there is a 

 pattern of yellowish-grey setae, which form five small patches 

 at the base of the pronotum and clothe the scutellum, the 

 elytral suture, and the three discoidal costae upon each 

 elytron. In the female the grey sette predominate, covering 

 the pronotum (except for two or three partially denuded 

 areas on each side), the scutellum, and the elytra, with the 

 exception of four dark stripes on each. 



The abdomen of the male is strongly arched, the pygidiurn 

 narrow, and the claws are very minutely cleft. In the 

 female the abdomen is moderately convex, the pygidiurn 

 broad, the legs are very short, and the claws are less deeply 

 cleft. The antennae are rather long and slender in both 

 sexes. 



J), assamensis resembles D. alsiosia, Bl., but is darker in 

 colour and has much more conspicuous markings. The 

 clypeus is deeply excavated, but less deeply than in 

 D. alsiosia, the pronotum is more convex, its sides less 

 sharply angulated in the middle, straight and not sinuated 

 from the angle to the base, and the hind angle very obtuse. 



