140 Psyche [Sept. -Dec. 
join the outer gradates; if not curving it is at least bent some- 
what before forking. If one has assorted many specimens of 
Nodita and Leucochrysa he will find specimens that arouse 
doubt. Specimens put in Nodita sometimes have the divisory 
vein ending at the upper end of cell, and Navas has described 
one ( notha ) with the divisory vein ending as in Leucochrysa. 
A specimen that has the divisory cell as typical of Leucochrysa 
as in L. varia was the last straw. For in other structures and 
in coloration it agrees closely with the large species of Nodita, 
azvedoi, maronica, egregria , etc., having the radial sector much 
curved, partly black, the costal area rather narrow, the mar- 
ginal forks wholly brown, and in the hind wing the marginal 
vein on hind margin is brown. 
I am convinced that the difference between Nodita and Leu- 
cochrysa does not reside in the divisory cell, but in the course 
of the radial sector. 
In Nodita the costal area at broadest is rarely equal to the 
radial area (at broadest), and the radial sector at widest part 
of the radial area is at least as near to medius as to the radius. 
In Leucochrysa the costal area at broadest is about equal to 
or broader than the radial area (at broadest), and the radial 
sector at broadest part of radial area is plainly nearer to radius 
than to the medius. 
Between Nodita and Chrysopa I have depended chiefly on 
the dark mark in stigma for Nodita. Many species of Nodita, 
on drying, tend to have the pronotum collapsed transversely, a 
deep groove along the middle; the transverse groove being close 
to the hind margin; some Nodita, however, show the transverse 
groove near middle of length. 
Those species of Nodita and of Leucochrysa perhaps in which 
the medius does not so plainly curve to join the outer gradates 
, might go into another genus; but I would prefer to find for it 
some other character. The width of the costal stigmal area in 
the true Leucochrysas is usually more than those that would 
be split off by this division; but the width grades so much it is 
not dependable. It might even be suggested to unite the large 
and typical Leucochrysa with the large Nodita into one genus, 
there is much in common, but the comparative widths of the 
costal and radial areas appear to keep them apart. 
The genera are much the same as those of northern South 
America, and in several cases the species; in northern Mexico 
