31.6 



THE EARWIGS OF CEYLON. 

 By Malcolm Burr. 

 With Plates A., B. (reproduced hy permission of the Entomological 

 Society of London). 

 {Continued from page 78 of this Vol^ 

 LABIDURA, Leach. 

 Body stout, flattened in front ; abdomen convex ; antennae with more than 

 twenty segments. Elytra and ivings well developed, the latter sometimes 

 absent by aberration ; first tarsal segment equal to the other two. No lateral 

 tubercles on the abdomen. Second tarsal segment simple. Forceps, $, with 

 the branches remote at the base, simple, slightly arcuate, toothed on the 

 inner margin in some species ; in the $ simple, straight, conical, incurved at 

 the tip, 



Lahidura, Leach., 1815, Edinb. Enc, ix., 118, 



Dohrn, 1863, Stett. Ent. Zeit, xxiv., 309. Borm. 1900, Forf. 31. 

 This genus may be known by its long antennae, well developed wings and 

 elytra (only very rarely are the wings abortive). 



Table of Species. 

 1. Size middling or large. Colour red or 

 reddish-brown. 

 Forceps toothed on theinner margin 

 in the $; pronotum with hinder 

 border straight, with the angles 

 rounded. 

 Abdomen dilated near the apex in a 

 straight line from the shoulders of 

 the elytra to the bases of the 



forceps 1. 



Abdomen strongly dilated at the 

 apex, but not in a straight line 

 from the shoulders of the elytra. 

 The anal segment is always very 



considerably dilated 2. 



Size very small. Colour dull-fuscous. 

 Forceps not toothed on inner mar- 

 gin in the $. Pronotum regularly 



rounded entirely behind 3, 



LABIDURA RIP ARIA 

 Reddish-testaceous ; antennse paler. Pronotum with the margins pale, the 

 posterior margin slightly rounded. Elytra reddish on the inner margin. 

 Wings not very prominent, or not even projecting, pale. Feet pale. Abdo- 

 men dark above and beneath, the sides somewhat paler, all the segments 

 rugose, slightly hairy on the hinder margins. The pygidium is flat and 

 depressed. In the $ the anal segment is slightly depressed in the centre 



2. 



2-2. 



1-1. 



RIP ARIA, Pall. 



BENGALENSIS, Dohrn. 



DUFOURII, Desm. 



