FIGURE 5 in The Chironomus group (Diptera: Chironomidae) in Lake Winnipeg, Canada

FIGURE 5. Chironomus (Chironomus) bifurcatus Wülker, Martin, Kiknadze, Sublette et Michiels. Numbers of adults caught in light traps and emergence traps in 1969 and 1971, and numbers of immatures in benthic samples from June to November 1969 and in March 1970. (LT = light traps, ET= emergence traps, short vertical lines = 1–25 specimens, second shortest lines = 26–50 specimens, medium long lines = 50–200 specimens; second longest vertical lines = 201–400 specimens, longest vertical lines = more than 400 specimens, 1 = first instar larvae, 2 = second instar larvae, 3 = third instar larvae, 4 = fourth instar larvae, P = pupae.)