[Syrphidae] Canopy research (question)

[Julio Cesar Rodrigues Fontenelle]

Dear all,
	Sorry I didn't put my question in the first message. I would like to knwon
if somebody already used a trap to collect hover flies or other flies in
the canopy? and how was this trap? 
		
			Thanks for any help


						Julio Cesar Rodrigues Fontenelle

Julio Cesar Rodrigues Fontenelle
Laboratorio de Ecologia e Comportamento de Insetos
Instituto de Ciencias Biologicas - UFMG 
Belo Horizonte - MG - BRAZIL
E-mail juliocrf@mono.icb.ufmg.br