ADIATHETUS. 



143 



segment nearly as long as the first; lobe of second segment 

 long and proininent ; all the legs strongly pubescent. Abdomen 

 parallel-sided, convex, deep chestnut-brown, very finely punctulate: 

 lateral tubercles distinct. A'enter brown. Last dorsal segment 

 of 6 ample, smooth, nearly square ; in the middle of the posterior 

 margin there is a pair of strong, parallel, compressed, prominent 

 tube!i-cles, obliquely truncate at the apex, directed up\\-ards and 

 Txickwards and densely hairy : in the $ shorter than in the J and 

 slio-htly narrowed, with a tumid tubercle over the root of the 

 forceps. Penultimate ventral segment of J and $ broadly rounded. 

 Pygidium of d stout, obtuse, almost hidden, bifid at the extremity ; 

 thai; of 2 short and thick, the posterior margin emarginate, the 

 ano-les pi-oduced into obtuse triangular tubei-cles. Eorceps : branches 

 in the d very strongly flattened and broadened in the basal 

 half, the inner margin of this part being strongly serrate ; half- 

 way down the dilation disappears and the apical half is attenuate, 

 but still robust and gently incurved, denticulate on the inner 

 maro-iu ; in the $ the branches are remote at the base, rather 

 depressed and trigonal, sinuously elongate with a prominent 

 sharp tooth one-third the way down, and another at two-thirds ; 

 the double edge in the trigonal basal part on the inner margin 

 is crenulate. In both sexes the forceps are dull reddish brown, 

 and densely clad with thick golden pubescence. 



d ? 



Length of body 15-5-21 mm. 18-5-21 mm. 



„ forceps .... 4-5 „ 11-12 „ 



SiKKiM (coll Bolivar) ; Borneo {coll. Ban-). 



Type in the Sarawak Museum. 



A very striking species ; the brilhant purple elytra, the dense 

 o-olden pubescence, and the remarkable form of the forceps in both 

 sexes make this earwig unmistakable. 



87. Adiathetus dravidius, sp. n. (Fig. 46.) 



General colour deep brownish black. Antennae with 17 segments, 

 black, the basal segments brownish ; third not very long, cylindrical ; 

 fourth about two-thirds as long as the third, a little thicker, ovate ; 

 the remainder regularly lengthening. Head smooth, brownish 

 black, shinijig, the frons very tumid ; sutures deep and well marked ; 

 occiput depressed in the middle, tumid on each side behind the eyes ; 

 posterior margin decidedly sinuate. Pronotum smooth, brown- 

 black, anterior margin convex in the middle, the angles rectangular ; 

 sides parallel, posterior margin rounded ; prozona tumid, metazonu 

 depressed, sides reflexed. Elytra smooth, dull blackish brown with 

 a bright orange spot on the posterior margin. Wings long, black, 

 with a bright orange basal spot, being the continuation of the spot 

 on the elytra. Legs uniform dull greenish brown ; tarsi long, the 

 first segment longer than the third. Abdomen parallel -sided, 



