1956] 
Adams — Myrmeleontidae 
83 
part of MA is retained in the Osmylidae as a sinuate vein 
running between MP and Rs shortly after the latter has di- 
verged from R; in the higher families this portion of the 
vein disappears. MA reappears, however, as the last branch 
from the “radial sector” (of previous authors, herein term- 
ed Rs-fMA), differing often in being strongly convex, and 
branching much more than do the true branches of Rs. 
Comstock has termed the triangular sector which results 
from this branching the “radial cuneate area”. Since the 
“radial sector” is a complex vein, the cross veins which lie 
behind it, between the base of the wing and its divergence 
from R, cannot be termed “radial cross veins” ; they are in 
reality median cross veins. Because they have been used so 
much as a source of taxonomic characters, confusion might 
result in referring to them as median cross veins, hence the 
writer has adopted the term presectoral cross veins (Figure 
8 , “ps”). 
There has been much controversy over the homology of 
the cubitus in the hind wing, Comstock holding that the con- 
vex forked vein which appears analogous to the cubitus in 
the fore wing is actually M 3 + 4 . His system was based most- 
ly on evidence from the tracheation and from the absence 
of the “oblique vein” (MP 3 -I- 4 ) from the hind wing. This 
forked vein is homologous to what has been termed MP 3+4 
in the other superfamilies ; but it is the belief of the writer 
that it is actually composed primarily of cubital elements. 
There is evidence which indicates that CuA t has, in the hind 
wing of all the Neuroptera, coalesced with M, resulting in a 
condition similar to that found in the Mecoptera, so that 
CuAi appears as the posterior branch of the vein which has 
been called MP. In this paper, the veins which Markl terms 
“A t ” and “A 2 ” are referred to as CuA 2 and CuP-f-A t , re- 
spectively. In the ant-lions, A 1 is coalesced for a short dis- 
tance with CuP ; the base of Ai although weak, is visible. 
Markl seems not to have noticed the double nature of this 
vein, although he shows the base of At correctly in his fig- 
ure 45. In the Osmylidae this coalescence has not taken 
place. The term inner cubital veinlets as used herein is 
equivalent to “anal veinlets” of previous authors. 
Few workers have made reference to the internal male 
