of the Coleopterous Group Macrodaclylides. 451 



The white lateral border of the pronotum is a little dilated 

 at the hind angle, and the median line is also dilated at the 

 base and is sometimes not produced far beyond it. 



This is a much more elongate species than D. ochracea, 

 uniformis, and pallida. The prothorax is rather large 

 relatively and strongly contracted both in front and behind, 

 producing a narrow-waisted form. 



The above description applies only to the male. In this 

 sex the front claws alone are cleft, but in female specimens, 

 which I believe to belong to the species, all the claws 

 are cleft, in addition to which there are no pale markings 

 upon the upper surface, the 5th ventral segment is greatly 

 enlarged, and the pygidium much reduced. 



Diphy cents tonkinensis, sp. n. 



Niger, elytris interdum eastaneis ; ovatus, compactus, capite crebre 

 granuloso, erecte griseo-piloso, clypeo breviter semicirculari ; 

 pronoto convexo, dense varioloso, basi laevi lineaque basali 

 mediana elevata, pilis longis erectis sparsuto setisque flavidis 

 prope latera et angulos posticos vestito, antice angustato, angulis 

 anticis fere acutis, posticis reetis, lateribus post medium angu- 

 latis ; seutello antice nitido, utrinque dense flavido-squamoso, 

 squamis elongatis, convergentibus ; elytris profunde sat crebre 

 punctatis, squamis elongatis nonnullis albidis vestitis ; pygidio 

 magno, setis albidis adpressis sequaliter baud dense vestito ; 

 corpore subtus, propygidio pedibusque setis longioribus et den- 

 sioribus similiter vestitis : 



J , minor, pedibus antennisque longissimis, prothorace antice 

 attenuato, abdomine toto tecto : 



$ , major, magis ovata, antennis pedibusque modice gracilibus, 

 abdomine postice baud tecto. 



($ . Long. 5-5 mm. ; lat. max. 3 mm. 



2 . Long. 7-8 mm. ; lat. max. 4 mm. 



Tonkin : Chapa (R. Vitalis de' Salvaza, May, June) ; 

 Laos : Pak Lay (R. V. de Salvaza, Nov.). 



This is very similar to the typical species, Diphy cents 

 davidis, Fairm., of Eastern China, the pronotum of which is 

 less densely punctured. It appears to resemble still more 

 the second Chinese species, D. reitteri, Sem., of which only 

 the female has been described. In that sex of the new 

 species the tuft of scales upon the scutellum is yellow, 

 instead of white, and the scales are erect and not decumbent. 



The two sexes differ considerably, as in all these insects. 

 The male is much smaller than the female, with the pro- 

 thorax attenuated in front, the abdomen and elytra much 



