The Male Genital Armature of the Dermaptera. 429 



merely modifications of the normal Diplatyne type, by blunting 

 and armature of the points. 



Other specific characters to be noted in this group are the 

 occasional striated, chitinous structures at the base, and hooks and 

 spines at the tip, of the virga, and the occasional presence of 

 denticulate areas in the preputial sac. 



The Neotropical Cylindrog aster Stal will probably require to 

 be restored when the material is available. 



I can detect no traces of gonapophyses in the female of 

 D. gladiator. 



In the same species the manubrium is scarcely differentiated 

 from the membranous base of the ninth sternite ; it is very short, 

 transverse, and rounded. 



Sub-family 3. Kakschiellin^e. 



This is a very well-marked Ethiopian group, with two genera, 

 Karscliiella Verb, and Bormansia Verb.. The discrimination of 

 the species is difficult, and I long considered them not to be valid, 

 but it seems that good characters are afforded by the genitalia, and 

 as these are figured by Zacher, presumably from Verhoeff's original 

 material, we now have definite means of discriminating at least 

 most of the species. The genitalia of B. mcridionalis Burr, and of 

 B. orientalis Bor., are still unknown, but I am daily expecting the 

 arrival of some fresh specimens of the former from Khodesia, 

 which will give the information required". 



Genus Karscliiella Verh. 



The three known species of Karscliiella may be distinguished 

 as shown below ; for want of clear discrimination I prefer to sink 

 K. bidentata Zacher as a synonym of K. ncavei Burr. 



1. Segmentum anale 6 processu nullo instruc- 

 tum, solum utrinque carinaturn ; para- 

 meres denti brevi armati (PI. V, figs. 20 

 and 21) . . . . . . .1. Neavci Burr.* 



1,1. Segmentum anale 6 processu acute utrinque 

 instructum. 

 2. Pronotum distincte transversum ; pro- 

 cessus anales paralleli ; parameresdente 

 interno longiori, al angulum autum 



inserto (PI. V. fig. 19) ... 2. Bilttneri Karsch. 



2, 2. Pronotum haud transversum ; processus 

 anales divergentes (?) ; parameres dente 

 interno ad anguhim rectum inserto, 

 breviori (PI. V. fig. 18) 3. Camerunensis Verh. 



* This species is somewhat larger than the other two ; the form of the meta- 

 parameres is quite distinctive. 



Oct. 20th, 1915 2 h 



