476 THE AMERICAN NATURALIST. [VoL. XXXIV. 
In one specimen M., loses its connection with 77.; and appears 
to be a continuation of Z. (Figs. 7 a, 7 b). 
ist A 
Fic. 7 4. 
Cu. is quite variable, typically; C»., has a single anterior 
branch which leaves the stem near the base, but in one speci- 
men this branch is joined to Cz.: below its middle, and in one 
case there are two branches on one side. In the genus there 
ist A 
Fic. 82. 
are never fewer than one, nor more than two, branches nor- 
mally. In one female in one tegmen the branch of Cu., 1$ 
transferred to M., (Figs. 8 a, 8 b). 
