60 Bulletin of the Brooklyn Entomological Society Vol. XIII 
3) 
The epiproct “sa,” paraproct “pa,” and cerci “c”’ of a female 
Grylloblattid (Fig. 93) are not particularly like those of the 
Blattids here figured, although they are somewhat like those of 
the Mantids shown in Fig. 71. Dr. E. M. Walker is making a 
study of the genitalia of the male of a specimen of Grylloblatia 
exhibited by Dr. C. G. Hewitt at the Philadelphia “ meetings,” 
and it will be extremely interesting to learn the results of his 
studies on this insect (which is one of the most important living 
representatives of the lower groups, from the standpoint of 
phylogeny) since it furnishes us with the real key to the ancestry 
of the Orthoptera. I have thought from the anatomy of the 
female (Crampton, 1917) that Grylloblatta is intermediate be- 
tween the Mantids and Embiids; but the study of the male will 
doubtless throw much more light upon the subject, and until Dr. 
Walker’s investigations are available, the final decision as to the 
ultimate relationships of Grylloblatta must be regarded as unde- 
termined, although there can be no doubt as to its affinities with 
the Orthoptera, and Phasmids. 
The “terminalia” (7. e., terminal segments and appendages— 
such as the epiproct, paraproct, cerci, etc.) of the Orthopteron 
shown in Fig. 56 are rather interesting from the fact that the 
epiproct bears a bifid posterior process labeled “ pc,’ and below 
it is another posterior process “sc.” Between the two is a ver- 
tical pocket containing a small sclerite whose shaded margin is. 
partially visible in the figure. 
The two posterior horn-like processes “b” of the Plecoptera 
(Bigs: 16, 17.12, sete!) Jhave) already, been) ceferned tommmidcee 
“bicornua”’ are short in the Plecopteron shown in Fig. 16, “b”; 
while in Fig. 17, they are much longer and curve mesalward. In 
Fig. 12 they are prolonged far forward and their tips are over- 
lapped by a “ hummock-like ” fold of the integument or “ epiplica.” 
Between the horn-like processes are tergal “sensomacule” (Figs. 
10, 17, etc., “‘sm’”’) or sense areas; and “‘ sternomacule ” or ventral 
sense areas (Fig. 13, etc., “su’’) occur along the median line of 
the sterna of certain of the abdominal segments. These areas 
should be of some value in systematic work, as is true of the 
various horns and protuberances mentioned. 
The cerci (“c” of all figures) are extremely variable structures, 
