Trichoptera (Caddisflies)

Ocelli absent. Antennae at the most as long as the anterior wings. Maxillary palpi 5-segmented, segment 2 slightly longer than segment 1; segment 3 about as long as segment 2, terminal segment flexible. Mesoscutum with a pair of rounded warts, sometimes also with setiferous punctures.

Ocelli absent. Anterior wings long, narrow, venation sometimes irregular in males; discoidal cell closed; median cell always absent. Posterior wings either narrow or wide, depending on species; discoidal cell closed in subfamily Triplectidinae, open in subfamily Leptocerinae.