LABIA. 121 



truncate ; in 5 not prominent. Forceps with the branches in 

 the c? remote, slender, nearly straight, gently arcuate, the inner 

 margin crenulate ; in 2 short, conical, contiguous, and nearly 

 straight. 



Length of body 3-5-4 mm. 



„ forceps .... 1m 



Ceylon : Peradeniya {E. E. Green ; coll. Burr). 



This species, one of the smallest of the earwigs, was described 

 by Motschulsky from a single female ; so its true affinities 

 remained unknown till Mr. Green found two males at Peradeniya 

 which are undoubtedly referable to this species and were in 

 company with the female. 



It is at first glance almost indistinguishable from the common 

 European Labia minor, L., but differs in the perfectly parallel- 

 sided pronotum, and quite distinct, though small, pygidium, which 

 resembles what is often mistaken for the pygidium in L. minor, 

 but is really a spine on the penultimate ventral segment. 



71. Labia ridens, i>or?».** (Pig. 42.) 



Labia ridens, Borm. (94) p. ^88, (00') ]■. (!() ; Kirby, (Oi) p. 20. 

 Labia ridens var. cyclolabia, Borm. (9J) p. 38 >, (Ooj p. 60; Kirby, 

 (04) p. 26. 



Ihe whole body thickly pubescent, with long yellowish hairs 

 and bristles. Kelatively large ; orange red, with blackish head 

 and elytra. Antenna? brown, with apical segments pale ; third 

 segment rather short, subclavate ; fourth segment rather thicker, 

 as long as third; fifth as loi)g as fourth. Head black or very 

 dark brown, rather depressed, sutures not very distinct. Pronotum 

 orange-yellow, nearly squai-e, almost as broad as the head ; anterior 

 margin convex, sides parallel ; posterior margin rounded. Elytra 

 ample, long and broad, blackish brown, coriaceous ; apical margins 

 obliquely truncate. Wings long, prominent, of tlie same colour 

 and consistency as the elytra. Legs yellow. Abdomen orange- 

 yellow, elongate and parallel-sided, lateral tubercles strongly 

 marked ; sliglitly dilated in the middle in the $ . Last dorsal 

 segment ample,' rectangular, transverse, smooth, with a pair of 

 obsolete tubercles in the middle of the hinder margin. Pygidium 

 of 6 and $ prominent, depressed, forming a nearly square 

 flattened plate ; posterior margin truncate, the angles tuberculi- 

 form, the sides parallel. Porceps with the branches orange-red, 

 remote at the base, depressed and elongate ; of the S there are 

 two forms : — 



(a) macrolahia, var. n. Branches very elongate, straight, gently 

 curved inwards at the apex, the inner margin depressed and 

 produced into an elongate, crenulate, flattened plate, terminating 

 in a sharp tooth about two-thirds the way down. 



(b) cyclolabia, Borm . The branches short, very gently diverging 



