1927] Thoracic Sclerites and Wing Bases of the Roach 67 
13, 16, etc.). The tegula tg (Figs. 6 and 16) is probably formed 
by the deposition of chitin and pigment in the membrane near 
the tegular incision ti, but the parategula, or basicostale ptg 2 
(Figs. 6 and 16), is probably a detached basal portion of the 
costal region (or vein) of the wing. 
Behind the suralar sclerite sur of Figs. 6, 10, 16 etc., is the 
suralar incision si and the alar ossicle labelled n in these figures, 
which is called the notale, or notopterale, is located in the 
neighborhood of the incision si. The alar ossicle n appears to be 
a detached portion of the notum. It is prolonged anteriorly into 
a neck-like, slender portion, whose “head” abuts against the 
end of the sclerite see. The sclerite see is a demarked “head” 
of the subcostal vein, and is the dorsal portion of the subcostale 
d (Figs. 1, 13, etc.) located on the under surface of the wing. 
The medialia, or median ossicles a, h and c of Figs. 6, 10, 16 
etc., intervene between the ossicle n, and the base of the wing- 
veins radius and media. The proximal mediale a, is separated 
from the ossicle n by the cleft nm of Fig. 16, and ossicle a sends 
down a ventral prolongation ia of Fig. 14, to form the ossicles 
labelled ia in Fig. 1, which are located just above the alifer o 
(the wing-bearing process of the pleuron). The incision in of 
Figs. 6 and 16 separates the ossicle a from ossicle h, which is 
usually, closely associated with the ossicle ha of Figs. 6, 10 and 
16. The suture (or cleft) im of Figs. 6, 10 and 16, separates the 
intermediate median ossicle h from the distal median ossicle c. 
Ossicle c, in turn, is separated from the head of the vein labelled 
mca, by the suture labelled ms in Figs. 16, 6 and 10. 
The basanal ossicle ba of Figs. 16, 6, 10 etc., usually ar- 
ticulates with the posterior notal wing process, or adanale ad, 
at one end, while at the other end, it is associated with the 
ossicle a , and is usually united more or less closely with ossicle 
h (see also Fig. 14). The anale, or anal ossicle an of Figs. 6, 10 
and 16, intervenes between ossicle ha and the base of the anal 
region in the fore wing of the roach, mantid and termite here 
figured. Faint traces of a postbasanal ossicle may be seen behind 
the ossicle labelled ha, in the metanotum of the roach shown in 
Fig. 16. 
In the fore wing of the roach shown in Fig. 16, the mantid 
