1973] 
Roth — Blattaria 
339 
ters”, the mediocephalic portion of the disk virtually without a me- 
dian carinula, and the ventro-lateral faces of the pronotum are not 
inflated or bullate, their surface deplanate). The L2d of pluteus 
with its finger-like projection falls into group 2 along with costata 
and scruposa, two species which are almost at the opposite extremes 
of Rehn’s listing. The finger-like extension could represent a “primi- 
tive” character which was lost in the species placed in group i. 
However, it is also possible that the L2d of pluteus represents a more 
highly evolved form with the extension developing from species which 
lacked it. 
Perisphaerini. — Unfortunately, the spelling of this tribe differs 
only slightly from the Perisphaeriini, but Rehn (1951) used Peri- 
sphaerus to erect the tribe based on wing venation. 
Li of this tribe is distinctive in that the upper lobe is considerably 
larger than the lower lobe, with a snoutlike projection over the cleft 
opening and a patch of numerous, moderately spaced setae on the 
lower lobe (e.g., Fig. 44). The preputial membrane is almost 
entirely modified to form the L2d which is weakly separated from 
the sclerotized L2vm ; a small part of the preputial membrane on the 
right side may not be sclerotized, and minute microtrichia can be 
seen in this region. The hook (R2) with (Figs. 240, 281, arrows) 
or without an apical notch ; no other genera, here examined, have an 
apical notch: Perisphaerus (Figs. 227-259), Pseudo gloineris (Figs. 
260-262), and Trichoblatta (Figs. 263-289). Three of 16 known 
species of Trichoblatta are African, the others, as well as all the 
species of Perisphaerus and Pseudo gloineris are Asian and adjoining 
islands. 
The genera and species can be grouped according to the degree of 
development of the apical notch on R2 : 
a. Apical notch absent: Pseudo gloineris gloineris (Figs. 260- 
262), Trichoblatta sericea (Figs. 264, 288-289). 
b. Apical notch poorly defined: Perisphaerus flavipes (Figs. 
2 57-259) (the shape of L2d of this species (Fig. 257) differs from 
all the others of the tribe), P. armadillo (Figs. 233-235, 248-251), 
and P. glomeriformis (Figs. 231-232, 254-256). 
c. Apical notch well developed: Perisphaerus contiguus (Figs. 
227, 236-238), P. flavicornis (Figs. 228, 239-241), P. semilunatus 
(Figs. 230, 242-244), P. aterrimus (Figs. 229, 245-247), Tricho- 
blatta magnifica (Figs. 268, 271-273), T. oniscina (Figs. 267, 274- 
276), T. tarsalis (Figs. 264, 277-279), T. nigra (Figs. 269, 280 
282), T. guerini (Figs. 266, 283-285). 
