STUDIES IN OLD WORLD FOKFICllJDS OK EARWKiS, 

 AND BLATTIDS OR COCKROACHES. 



B}' James A. G. Rehn, 



OJ the Academy of Natural Sciences of Ph'dadelphia. 



The notes contained in the following- pages are based on material in 

 the collections of the Academy of Natural Sciences of Philadelphia, 

 and of the United States National Museum. 



The Hirase material from Japan, the Harrison and Hiller collection 

 from Sumatra, the Abbott material from Trong, Siam. and the collec- 

 tions made hy Koebele of Austi-alian and New Zealand forms were the 

 larger faunal collections examined. 



The author wishes to express his thanks to Dr. W. H. Ashmead for 

 the privilege of examining the material from the United States 

 National Museum. 



Family FORFICULID.E. 



Genus LABIDURA Leach. 



1815. "Lahldid-d Leach, Edinb. Em-ycl., IX, p. 118." 



Ti/j}e. — '"'' Lahidrii'd (/ti/anffa^^ — Forlicula rijHtria Pallas. 



LABIDURA HUSEINiE (Rehn.) 



1901. Apterygida husehuv Rehx, Proc. Acail. Nat. Sci. Phila., \^. 278; Sheikh 

 Husein, Gallaland, Africa. 



On second examination this species is seen to be a member of tiie 

 genus LahUhira and to represent a form of the rijxiria group. The 

 recent treatment of this group hy Kirby" is substantiated as far as our 

 material goes. 



This species belongs to the same section of the group as inennis 

 Brunner, iiiarglnella Costa, auditor Scuddei-. crenata Olivier, and 

 mtumlk Burmeister. From iiwmix it diti'ers in having the internal 

 border of the male forceps more heavily dentate, the median tooth 

 being very distinct; from inargineUa it diflers in the .somewhat larger 

 size and crenulate basal section of the male forceps; from auditor in 



"Ann. and Mag. Nat. Hist., 7th ser., XI, pp. 63-66. 



Proceedings U. S. National Museum, Vol. XXVII— No. 1363. 



