Insect life; an introduction to nature-study and a guide for teachers, students, and others interested in out-of-door life . Fig. 37.—a damsel-fly. 66 INSECT LIFE. Order Plecoptera (Ple-copte-ra).The Stone-flies. The members of this order have four membranouswings, with comparatively fezu or luith many cross-veins ;the hind zvings are much larger than the fore zuings, andare folded in plaits and lie upon the abdomen wlien atrest. The mouth-parts are of the biting type of structure^but are frequently poorly developed. The metamorphosisis ijicomplete. The name of this order is from two Greek wor
Insect life; an introduction to nature-study and a guide for teachers, students, and others interested in out-of-door life . Fig. 37.—a damsel-fly. 66 INSECT LIFE. Order Plecoptera (Ple-copte-ra).The Stone-flies. The members of this order have four membranouswings, with comparatively fezu or luith many cross-veins ;the hind zvings are much larger than the fore zuings, andare folded in plaits and lie upon the abdomen wlien atrest. The mouth-parts are of the biting type of structure^but are frequently poorly developed. The metamorphosisis ijicomplete. The name of this order is from two Greek words:plecos, plaited, and pteron, a wing. It refers to theway in which the hind wings are. Fig. 38.—A stone-fly Fig. 39.—A nymph of astone-fly. folded when at rest. Fig. 38 represents one of thelarger members of this order with the wings of oneside spread, and Fig. 39 represents a nymph. Workon these insects is outlined in the chapter on BrookLife. CLASSIFICATION OF INSECTS. ^7
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