74 LABIDURIDJE. 



shown that in the Neotropical species, l-'salis americana, Pal.- 

 Beauv., these folds are present in the larvae and nymphs, but 

 disappear when the creature attains maturity. This is evidence 

 in favour of the view that these organs are useless as generic 

 characters. 



The possession of fully developed elytra is the chief distinction 

 between Psalis and AnisoJahis, so that immature specimens of 

 the former are easily mistaken even for adult specimens of the 

 latter genus. 



The Psalime are generally thick-set, dark-coloured earwigs, 

 with stout forceps. 



Table of Genera. 



1. Elytra perfectly developed ; (abdomen 

 subparallel-sided ). 

 2. Antennse with 12-22 segments; sides 



of abdomen with no glandular folds . Psalis, Serv., p. 74. 

 2.2. Antennae with 20-30 segments ; sides [p. 78. 



of abdomen with glandular folds . . Labidurodes, Dubr., 

 1.1. Apterous forms; elytra entirely wanting 

 or rudimentary. 

 2. Abdomen dilated from the base to the 



apex. (Elytra absent.) Gonolabis, Burr, p. 79. 



2.2. Abdomen subparallel-sided, or slightly 

 dilated about the middle. 



3. Iillytra entirely wanting Anisolabis, Fieb., p. 80, 



3.3. Rudimentary elytra present Borellia, Burr, p. 87. 



Genus PSALIS, Serv. 



Psalis, Serv. (31) p. 34. 



Carcinophora, Saidd. (76) p. 291. — Type,C robusta, Scudd. 



Type, Forficula americana, Pal.-Beauv. 



Body stout ; antennae with 12-22 segments ; basal segment very 

 long and conical ; third segment cylindrical, half as long as the first ; 

 third and fourth short, no longer than broad ; fifth a little longer ; 

 sixth and others gradually lengthened, the sixth nearly as long as 

 the third. The segments are nearly cylindrical, but in the Indian 

 species they are almost clavate. Head convex, smooth and shining. 

 Pronotum nearly as broad as the head, subquadrate, widened 

 somewhat posteriorly (especially in Old World species) ; posterior 

 margin convex. Mesosternum convex ; metasternum with the 

 lobe produced between posterior coxae, truncate. Elytra and 

 wings smooth, well developed, the former with no carina. Legs 

 rather short, stout. Abdomen broad and depressed, last doi'sal 

 segment quadrate in both sexes ; sides of the sixth, seventh, 

 eighth and ninth segments acute ; no glandular folds in adults. 

 Penultimate ventral segment of the c? broad, obtuse, rounded ; 

 in the $ roundly triangular ; pygidium indistinct. Porceps with 



