Male Genital Armature of the Dermaptera. Part II. 541 



pad of denticulate stria? in the preputial sack; in P. dohrni 

 and P. pervicina there is a strongly marked denticulate pad at 

 the end of the sacks, but I cannot detect any teeth in P. greeni. 

 The specimen of P. greeni from which I drew the mount was 

 one of the large black race from Ceylon referred to in my Der- 

 maptera of British India. I have an idea that when we examine 

 the genital armature of the typical form, we shall find it of the 

 Ppilabis type, with which group typical P. greeni agrees externally 

 very closely (PI. XII, figs. 1-3). 



Genus Gelotolabis Zacher. 



I prefer to expand the genus Gelotolabis of Zacher, to neglect 

 the absence of " Chitinverdickungen " in the preputial sack as a 

 generic character, and to define it by the shape of the metapara- 

 meres, which are about ecpaally broad through their length, but 

 terminate in a small tip or snout; the outer margin is gently 

 convex as a rule, but in G. maxima Brulle the convexity is more 

 pronounced, assuming the form of an obtuse angle, which at first 

 inclined me to make a separate genus for it. I sink here Zacher's 

 genus Horridolabis, as being insufficiently characterized. His type 

 species, H. paradoxura, is identical with my Anisolabis felix. The 

 type of Gelotolabis is G. burri Zacher, in which I sink G. sethiopica 

 Burr ; other species are the allied G. kristenseni Burr, also from 

 Abyssinia, and G. infelix Burr, from Central Africa. Thus, at 

 present it contains only African species, and, when G. maxima is 

 removed, only purely Ethiopian species (PL XII, figs. 4-6). 



Genus Gonolabis Burr. 



This genus is now very much reduced, only containing a few 

 totally apterous Indo-Malayan species, in which the metapara- 

 meres, a little longer than broad, are rounded externally, and the 

 abdomen in the male attains its greatest breadth at the tenth 

 sclerite. 



Zacher differentiates it from Euborellia only by the absence of 

 teeth in the preputial sack, and the absence of any trace of rudi- 

 mentary elytra, but the form of the metaparameres more closely 

 resembles that of Gelotolabis ; it differs from that genus in the 

 usually smaller size of the species, in their occurrence in the 

 Indo-Malayan province, and in the marked apical dilation of the 

 abdomen in the male. 



Zacher's G. kukenthali is identical with G. javana Bor. ; I 

 have compared the two types, and there is no doubt whatever as 

 to their identity. G. javana is sharply characterized by the rather 

 peculiar coloration, and by the keel on the ninth sternite of the 



