207a (206a). Humeral cross vein forming a recurrent vein; discal area of
wings distinct from
costal and
marginal areas by series of cross veins; S-c and R-1 fused apically (Fig.A)..
………………………………………………………….....................…..(Neuroptera) Polystoechotidae
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A
207b. Humeral cross vein not forming a recurrent vein; discal area of
wings not differentiated
from marginal area............................................……......................................……...................................
208