Procedure for mass collection of mermithid postparasites (Nematoda: Mermithidae) from larval blackflies (Diptera: Simuliidae)

Abstract
Larval blackflies, Prosimulium mixtum/fuscum Syme and Davies and Simulium venustum Say, were collected from natural populations and maintained in the laboratory for emergence of their mermithid parasites, Neomesomermis flumenalis (Welch, 1962) Nickle, 1972. Between April and July 1973, 4378 postparasitic N. flumenalis were obtained from about 250 000 blackflies for laboratory culture experiments.