421 



adjacent to the anus and callipers, the absence of ganapophyses 

 in the Î and, instead, the large development of the eighth ster- 

 nite in that sex and the presence of a special sclerite (the clutch) 

 accessory to copulation, and the comparatively feeble develop- 

 ment of the tenth tergite correlative with the weakness of the 

 callipers. 



LITERATURE 



Burr, Dermaptera : Wytsman, Genera Ins., Fase. 12Z 11911). 



A new species of Arixenia (Dermaptera) — Ent. Mo. Mag. (2) xxiii., 



p. T05 (1912). 

 Jordan, Description of a new kind of apterous Earwig, apparently para- 



•sitic on a Bat — Nov. Zool., xvi., p. 133, t. 16-18 (1909). 

 Z.\CHER, Studien über das System der Protodermapteren — Zool. Jahrb., 



Abt. Syst., XXX., p. 303 (191 1). 

 For further literature cf. Z.\cher, I.e., pp. 387-400. 



