The end of the net, with arthropods inside, can then be placed into a wide-mouth killing jar, which is then capped (Figure 3.18a and b). The killing jar should contain either gypsum cement (plaster of pairs) or a few cotton balls freshly soaked with ethyl acetate. This compound will kill the adult arthropods after a few minutes (2 to 5 minutes of exposure is usually adequate). Following immobilization, the arthropods can be transferred into vials containing 80% ethyl alcohol (ETOH) by placing a small funnel into the vial and carefully dumping the contents of the net into the funnel (Figure 3.19). If the investigator prefers to not use the kill jar technique, the fling adult arthropods can also be placed directly into alcohol by holding the end of the net up and reaching under the wire hoop and into the net with an alcohol vial and gently tapping the insect into the vial (Figure 3.20a and b).