Organogenesis was observed in different age embryos and first
instar larvae of Nomia melanderi Cockerell (Halictidae), Megachile
rotundata (Fabricius) (Megachilidae), and Bombus griseocollis
(DeGeer) (Apidae) (Hymenoptera : Apoidea). It was found that, with
the exception of the ventral nerve cord, comparable organ development
had occurred by the beginning of the...
