1972] 
Henry — Ululodes and Ascalopterynx 
21 
demonstrated in Old World owlflies, and active defense of the 
twig by the gregarious larvae of Old World species appears to be 
the norm, even among ascalaphine genera (Westwood, 1888, on 
Helicomitus insimulans; Froggatt, 1900, on Acmonotus sabulosus; 
Ghosh, 1913, on Helicomitus dicax; and Tillyard, 1926, on Suhpa- 
lacsa spp.). The need for detailed studies of the life histories of 
certain key groups within the various subfamilies and tribes is very 
great. 
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