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Published online by Cambridge University Press: 31 May 2012
On two occasions I have observed Allantus basilaris (Say) Nort. ♀ devouring another insect; in one instance the larva of a Chrysopa, in the other a small flower beetle of the genus Phalacrus. Although no such habit has been recorded previously in regard to any American species, it does not appear to be entirely without precedent among the European members of this family, for, according to Westwood, (Introd., ii., 109) “Various species, however, (T. viridis, scalaris, etc.) attack and devour living insects which frequent the same plants, as observed by St. Fargeau (Ann. Soc. Ent. France, 1834, p. 11) and Dahlbom (Prod. Hym. Scand., p. 38).”