of the Coleopterous Group Mucrodactylides. 447 



Annam : Keng Trap (R. Vifalis de Salvaza, May). 



Of this also I have seen only the male, a single specimen. 



It is a species closely related to D. multicolor and pu/che/la, 

 especially the latter. It is smaller, narrower, and more 

 cylindrical in shape, and the pronotum is without the long 

 erect hairs occurring in D. pulchella. The coloration and 

 pattern are similar, but the pronotum, in addition to the 

 yellow border, has a median line of grey setse by which the 

 black disc is divided into two patches, and the pale scales 

 of the elytra form irregular longitudinal stripes, the first 

 extending from the middle of the suture to the apex, the 

 second from the base to beyond the middle of the elytron, 

 and the third from the middle to near the extremity. There 

 are two other very short longitudinal bars at the base, of 

 which the outermost reappears just before the middle. The 

 P3^gidium (in this sex) is narrow and densely clothed with 

 grey scales. 



Dichelomorpha nitidicollis, sp. n. 



J . liufa, capite pronotoque nigris, capite, pronoti lateribus, 

 scutello elytrisque sat dense flavo-setosis ; sat angusta, capite 

 crebre puuctato, margine rotundato, reflexo ; pronoto nitido, sat 

 crebre, antice et lateraliter creberrime, punctato, disco pills 

 griseis erectis sat parce vestito, lateribus antice fortiter arcuatis, 

 postice fere rectis, valde contractis ; el} tris lateraliter leviter 

 arcuatis, ante apices longe sat late fulvo-penicillatis ; pygidio 

 sat dense fulvo-setoso, corpore subtus pedibusque longe tulvo- 

 hirsutis ; antennis tarsisque gracilibus, tibia antica sat fortiter 

 bidentata, uuguibus minutissime fissie. 

 Long. 8 mm. ; lat. max. 4 mm. 



Upper Mekong R. : Houei Sai (R. Vitalis de Salvaza, 

 May). 



Only a single male specimen is known. It is reddish 

 brown, with the head and pronotum black, and clothed with 

 rather long yellow hair beneath and Vi ith minute yellow setae 

 above, except upon the disc of the pronotum, which is 

 shining black and bears only a thin clothing of erect short 

 hairs amongst which longer hairs are scattered. The lateral 

 margins bear close-set orange setic, and there is a minute 

 grey tuft at the middle of the base. The scutelluni and 

 elytra are fairly closely covered with buff-coloured setse, 

 which are sparser on the anterior pait of the elytra and 

 much less conspicuous at the sides. Tiiere is a rather broad 

 ante-apical fringe of long yellow hairs crossing the suture, 



