After lunch the group nets, categorizes, and identifies aquatic insects stoneflies, caddis flies, and mayflies using a hand lens, 
(caddis; flies; T:After lunch the group nets, categorizes, and identifies aquatic insects stoneflies) (mayflies; using; a hand lens)
caddis mayflies
flies using
T:After lunch the group nets, categorizes, and identifies aquatic insects stoneflies
a hand lens