No. 402.] THE VENATION OF TRIMEROTROPIS. 475 
This occurrence is common in Psinidia eucciata, if it is not 
the rule, and it seems to be natural to CEdaleus. The fork of 
R. is quite variable in position. Generally it is one-third the 
width of the tegmina at this point distad of M. fork, but in 
three cases it is more than one-half, while in one instance it is 
more than once, and in another one-eighth, the width of the 
CF, 
tegmina distad of the same point. This is certainly equal to 
any similar variation normal to the genus and is rarely exceeded 
in genera of the subfamily. 77. has two simple forks, JZ, and 
M.3, which do not vary conspicuously. The fork of M., how- 
ever, which is usually decidedly proximad of the fork of Cu., in 
four females and two males, is parallel with it or even slightly 
distad. In a single instance the cross-vein, which is always 
Fic. 6 4. 
present at the outer end of area M., and which usually, in 
the genus as well as in the subfamily, when present, con- 
nects M. and Cz, joins the main stem of M. with Ch 
(Figs. 6 a, 6 8). : 
The intercalary vein, which is usually separated apically 
from M. by once, male, or two or more times, female, its width, 
has this relation reversed in a single female and seven males. 
