. The Canadian field-naturalist. 1969 McCoNNOCHIE AND LiKENS: TrICHOPTERA IN NeW HAMPSHIRE 149 E o O in. BLACK LIGHT- SCREEN FUNNEL PLUG FOR BATTERY BASKET POISON SOURCE -20 cm- Figure 1. Lighted trap for adult Trichoptera. The 6-watt General Electric "black light" is powered bv a 12-volt storage battery. Insects hit the screen, fall through the funnel into the bucket and are killed by ethyl acetate fumes. The fumes are emitted from a plaster-of-paris block that was soaked in ethyl acetate. and 700 m (elevation 573 m) along the course of the stream above the weir in watershed 4. Over
. The Canadian field-naturalist. 1969 McCoNNOCHIE AND LiKENS: TrICHOPTERA IN NeW HAMPSHIRE 149 E o O in. BLACK LIGHT- SCREEN FUNNEL PLUG FOR BATTERY BASKET POISON SOURCE -20 cm- Figure 1. Lighted trap for adult Trichoptera. The 6-watt General Electric "black light" is powered bv a 12-volt storage battery. Insects hit the screen, fall through the funnel into the bucket and are killed by ethyl acetate fumes. The fumes are emitted from a plaster-of-paris block that was soaked in ethyl acetate. and 700 m (elevation 573 m) along the course of the stream above the weir in watershed 4. Over a period of nine weeks, starting 4 July 1966 and ending 2 September 1966, a trap was set once a week at each of these sites. Exceptions to this scheme occurred in the first and third weeks when collections were obtained from only two sites. The upper site was missed the first week, and the lower site was missed the third week. It was not possible to collect at all three sites on the same night since only two traps were available. All of the sites were within 2 m of the stream, and were selected to give approximately equal spacing along the stream course and to avoid shielding by vegetation as much as possible. The traps were set out approximately one-half hour before sunset and were collected the next Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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