308 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
(The numbers in par¬ 
entheses are those of 
the characters in the 
table on pages 303-4). 
(1 & 2) Direction of 
teeth on 2d and 3d 
femora. 
< . the same 
X 
different 
> 
(3) Tarsal nails. 
not bi 
fid 
X bifid > 
(5) Nodal sector. 
<.waved 
X 
not wa\ 
ed 
(6) Rows of cells be¬ 
tween subnodal sec¬ 
tor and next supple¬ 
mentary sector below. 
< . two 
X 
one 
> 
(9) Triangle of front 
wings. 
crossed 
X- • 
• • free-• • > 
Maerothemis 
