54 Bulletin of the Brooklyn Entomological Society Vol. XIII 
In addition to the lower lobes “sl,” a lateral lamina “ pl” occurs 
in many Mantids and Blattids (Figs. 83, 91, 75, 78, etc.), and in 
such roaches as Periplaneta (Figs. 67 and 68) the sinistral sub- 
lamina is apparently divided into the two structures labeled “ pn” 
(sometimes referred to as the titillator) and “ju.” In the latter 
roach, two other processes “pu” and “f” (Figs. 67 and 68) 
occur. The structure labeled “f” is a plate bordered by a fringe 
of flat spines, and appears to be a portion of the lateral lamina 
“pl”; while the process “pu,” which has been called the “ penis ” 
by some investigators, is more intimately associated with the parts 
employed in copulation, and is also represented in the roach shown 
in Fig. 83, “pu,” etc. There is a possibility that the process 
* pu” of Figs. 67, 68, 83, etc., may be the homologue of the para- 
meres “pr” of the phallus of the more primitive insects (Figs. 
28, 86, etc.) or even of the parts “eu”; but this point cannot be 
determined from the material at present available. 
The phallus of the saltatorial Orthoptera (Figs. 45, 57, 66 and 
69) has two lower lobes “sl,” which are probably homologous 
with the lower lobes of the Blattid and Mantid phallus (Figs. 75, 
78, 83, and 91, “sl”). Within the phallus of a tree-cricket, for 
example (Fig. 72), there are two processes forming the “endo- 
phallus” labeled “en,” lying directly below the roof of the phallus 
“tm.” Above the phallus of the tree-cricket is the titillator “ ep” 
of Figs. 66, 69, 72, 73, and 74. The titillator has been referred 
to as the epiphallus by some investigators. In the tree-cricket 
(Figs. 66 and 73) there are two partially united hooks, or “ epi- 
hamuli” projecting posteriorly from the titillator, and in the 
“Locustid” shown in Fig. 76, these “epihamuli”’ project back- 
ward as two distinct hooks labeled “ep.” The small processes 
designated by the label “ep” in Fig. 45 are doubtless homologous 
with the “epihamuli.” In the “ Locustid” shown in Fig. 60, there 
are two callosities bearing small spines, designated by the label 
““ec,” which are associated with the titillator, but are not strictly 
homologous with the hooks. ‘These callosities, termed epicalli, 
are possibly homologous with the processes labeled “ep” in the 
grasshopper shown in Fig. 64, though these processes may be 
homologous with the hooks of the titillator rather than with the 
callosities. These features appear to be characters of consider- 
