During the summer of 1972, eighteen species representing six genera of mosquitoes were collected in Black Hawk Park, Cedar Falls, Iowa, using a New Jersey light trap, a dry ice baited CDC miniature light trap, an unbaited malaise trap and biting collections. Collections were mad to investigate trap biases. The New Jersey light trap and the CDC miniature light trap collected the widest spectrum of mosquito species which included the following genera: Aedes, Anopheles, Culex, Culiseta, Coquillettidia, and Psorophora. The malaise trap was selective for species of Aedes and Culex. The biting collection contained An. punctipennis and P. horrida in addition to representative of Aedes.