ADIATHETUS. 145 



Pronotum black with a copper-green lustre, nearly square, very 

 slightly broader posteriorly than anteriorly, anterior margin gently 

 convex, posterior broadly rounded and sides straight ; prozona 

 tumid with a faint median sulcus and an impression on each side ; 

 metazona depressed. Elytra ample, well rounded at the shoulders,' 

 broad, gently emarginate at the apex, with no keel on the costal fold ; 

 perfectly smooth, of a brilliant, lustrous, metalhc green. Wings 

 prominent, of the same colour as the pronotum, with a small orange 

 spot at the extreme apex. Legs blackish ; the tarsi somewhat 

 paler ; tibiae with the upper surface only flattened and furrowed 

 at the apex itself. Abdomen bright chestnut-red, shaded with 

 blackish, lateral tubercles distinct ; the whole surface puuctulate ; 

 venter shining, deeper red. Last dorsal segment of d ample, smooth' 

 black, shaded with red, somewhat broader than long, posterior 

 margin tumid over the roots of the forceps, depressed in the 

 middle, with a pair of small tubercles in the depression ; exterior 

 angles sharply rectangular ; in the $ similar but a trifle narrowed 

 and the tubercles less developed. Penultimate ventral segment of 

 c? and 2 broadly rounded. Pygidium of c? very short, transverse 

 and obtuse ; of $ very prominent, red, acute, lanceolate. Forceps 

 with the branches red, depressed, rather broad, and remote at the 

 base ; m the d rather short, stout, gentlv arcuate, with a strong 

 tooth on the mnei% margin in the basal third ; in the $ elongate, 

 nearly straight, gently curved inwards at the apex, the inner margin 

 denticulate. 



d 2 



Length of body 10-14-5 mm. 10-12 mm. 



forceps.... 2-5-3 „ 5-8-75,, 



Upper Assam (Ind. JIus.); Burma: Kachin Hills, viii 

 Karen-ni, Geku District, 4300-4700 ft., v. (Genoa Mus.) • Ten- 

 ASSEEiM : Meetan, iv. {Genoa Mus.). ' 



Also recorded from Tonkin (Paris Mus., coll. Burr). 



Tif2}e in the Genoa Museum. 



The contrast between the brilliant green elytra and bright red 

 abdomen and forceps renders this a very handsome and conspicuous 

 species, which is not likely to be confused with any other, except 

 perhaps the following. The details, shading and armature' of the 

 forceps are of course variable features. 



Verhceff" ranged this species in ChelisocheUa, evidently by 

 guess-work, for if he had ever seen a specimen he would have 

 noticed the absence of the costal keel of the elytra by which he 

 himself characterizes that genus. 



89. Adiathetus nigrocastaneus, sp. n. (Pig. 48.) 



Of medium size ; black, varied with chestnut. Antennse with 

 19 segments, black, with two pale segments before the apex - the 

 third not very long and second shorter than the third, ovate ;'fiftb 



