104 
In the Acanthaclisini Rs in both pairs of the wings 
arises further out than the level of the cubital and of the 
median fork. In the forewing Cx 2 is rather short, and it 
coalesces with ZA where it reaches the first crossvein from 
Cuı, or a little further out. Basal part of 2A well-separated 
from JA. A distinct crossvein between 7A and 2A is pre- 
sent at that point where 2A begins to diverge from 7A. 
2A and 3A forked. In the hindwing 7A is unforked. 
2A is present and running forward at some distance from 
the hind margin of the wing, until it coalesces with ZA 
a little before this nervure runs into the hind margin”). 
The area circumscribed by these-two nervures has the 
likeness of a circular cell. The wings rather long; their 
apex more or less pointed. The nervature very conspicuous. 
Body and legs stout, and strongly haired. 
Analytic table of subfamilies and tribes. 
1. JA of forewing does not coalesce with Cu2. IA, 2A 
and 3A present in both pairs of the wings ......... 
| Archemyrmeleonidae. 
IA of forewing coalesces with Cu2 for some distance. 
2A -in hindwing rarely; present; GA absent >... se 22 
II Neomyrmeleonidae 2. 
2. In the radial area of the hindwing only one crossvein 
present before the origin of Rs. Dendroleoninae. .3. 
In the radial area of the hindwing two or more cross- 
veins present before the origin of Rs. Myrmeleon- 
3. In the forewing Rs arises before the level of the fork 
of Cuz. The free and basal part of Cu2 in the fore- 
wing long; two or three crossveins present between this 
part and Cul. 2A and 3A in the forewing well se- + 
Patave cl sei sien ae eee a eee Dendroleonini. 
In the forewing Rs arises further out than the level 
of the fork of Cuz. The free and basal part of Cu2 
in the forewing is short; at most one crossvein between 
this part and Cw7 present. 2A and 3A coalesce in a 
point, or, TOF, Sone. distance’... „2... tee eee eee 4. 
*) In some American species the two nervures separate just before 
they reach the margin, 
