1928] 
The Protocoleoptera 
35 
distinguished mainly by the elytriform fore wing with apex at 
Media. 
Note: In view of the uncertainty prevailing as to the 
homology of the anal veins in the various orders of insects, I hereby 
propose the term Plical (PI) to designate, without any implica- 
tion of homology, a vein or veins closely associated with the 
anal fold, and more or less set off from the cubitus and from the 
other anals. For the* latter (excluding the plical or plicals) 
the term Axillary, already in use in this sense in the Lepidoptera 
and Orthoptera, may be used, restricting that term, then, to 
anals associated with the anal fan rather than the fold. The 
maximum number of plical veins will be three (hind wing of 
Blattoidea and Mastotermes), one of them being in that case 
free, one supplied by a trachea coming off the anal fan, and the 
third sometimes with a free trachea, but more often supplied 
from the base of the cubital trachea. In higher forms there will 
be in general one Plical, but it is not clear to which of the three 
in the Blattoidea (if any) it corresponds. 
