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Published online by Cambridge University Press: 31 May 2012
Maxillary lobes membranous. Mandible with molar corneous, lacinia membranous.
Head wide, strongly deflexed. Front not tuberculate or carinate. Eyes hidden in repose. Clypeus apparently broadly emarginate when viewed from above; in reality not emarginate, the apex being bent ventrad and caudad, this inflexed portion short and limited above by a fine carina.
* —Contribution from the Division of Systematic Entomology, Entomological Branch, Dept. of Agric., Ottawa.