KEY TO SUBFAMILIES OF BLATTIDJB. 65 



c. Supra-anal plate not bilobed; form not strongly depressed. 



d. Smaller, the pronotum less than 7 mm. in length; structure 

 moderately delicate; styles of male not slender, elongate, 

 straight processes of equal length; stibgenital plate of fe- 

 male simple. I. PSEUDOMOPIXJE, p. 66. 

 dd. Larger, the pronotum 7 mm. or more in length; structure 

 heavily chitinous, femoral spines very heavy; styles of male 

 slender, elongate, straight processes of equal length set in 

 sockets on margins of subgenital plate (Fig. 34, F. ); subgen- 

 ital plate of female compressed so as to form a carina or 

 ridge on its under side and divided so as to be bivalved (Figs. 

 32, C; 34, E.). IV. BLATTIX.E, p. 93. 

 cc. Supra-anal plate weakly bilobed in both sexes; size medium, 

 length of body, 15 20 mm.; form strongly depressed; tegmina 

 and wings of female fully developed, falling slightly short of 

 apex of abdomen; pronotum dark brown, bordered in front and 

 on sides with yellow. III. EPILAMPRIX.*:, p. 92. 

 lb. Pronotum and tegmina rather densely clothed with fine, silky pu- 

 bescence; very large, adventive species, 27 or more mm. in length. 



II. NYCTOBORIX.E, p. 91. 



aa. Lower margins of middle and hind femora unarmed, or armed with 

 hairs and bristles only, or with one or two apical or sub-apical 

 spines. 

 e. Tegmina present in males, wanting in females of Arenivaga and 



Compsodes. 



f. Surface of pronotum and tegmina glabrous; anal field of wings 

 folding like a fan; subgenital plate of female simple, except in 

 Chorisoneura. 



g. First four tarsal joints each with a pad (pulvillus) beneath; 

 ocellar spots present; wings without an appendicular field: 

 supra-anal plate weakly bilobed. 



Ji. Smaller, length of body less than 25 mm.; hind margin of 

 pronotum strongly obtuse-angulate at middle; blackish 

 brown or pale green, the pronotum without discal spots; 

 arolia present. V. PAXCHLORIX/E, p. 103. 



Jili. Larger, length more than 40 mm.; pronotum subelliptical, 

 buffy with a blackish-brown central area containing pale 

 markings; arolia absent. VI. BLABERIX.E, p. 106. 



gg. Fourth tarsal joint alone with a pulvillus beneath; ocelli and 

 ocellar spots absent; wings with an appendicular field: supra- 

 anal plate not bilobate; subgenital plate of female either sim- 

 ple or with a linear cleft or sulcus at apex; large arolia pres- 

 ent; small species, length of body less than 10 mm. 



IX. OXYIIALOINJE, p. 111. 



/f. Surface of pronotum and tegmina hairy; anal field of wings not 



folding fan-wise. 



i. Ocelli of males minute, or wanting, the ocellar areas not de- 

 fined; tegmina and wings usually present in both sexes an:! 

 projecting beyond apex of abdomen (Fig. 49, D.); arolia and 



