Family Cephidae stem sawflies

A small group of relatively small, mainly black, yellow-banded, slender-bodied sawflies with long, thread-like (filiform) antennae. Larvae apodous but with three pairs of small, leg-like thoracic tubercles; ocelli vestigial; metathoracic spiracles well developed; subanal appendages present but vestigial; abdomen terminating in a fleshy protuberance above the anus (Fig. 147). Larvae bore within shoots or stems, pupation

Medium-sized, stout-bodied, slow-moving saw-flies; antennae with three segments (Fig. 148a), the third long and often bifid; forewings without cross-vein 2r (cf. Fig. 149); cenchri particularly large. Larvae with six to eight pairs of abdominal prolegs.

EXAMPLE: Arge ochropus (large rose sawfly). 5. Family CIMBICIDAE

Relatively small to large, stout-bodied, fast-flying sawflies; antennae strongly clubbed

Fig. 148 Antennae of sawflies: (a) family Argidae (3-segmented); (b) family Cimbicidae (clavate); (c) family Diprionidae - female (serrate); (d) family Diprionidae - male (bipectinate).

Fig. 148 Antennae of sawflies: (a) family Argidae (3-segmented); (b) family Cimbicidae (clavate); (c) family Diprionidae - female (serrate); (d) family Diprionidae - male (bipectinate).

(Fig. 148b); cross-vein 2r of forewing present (Fig. 149). Larvae fleshy and usually remaining curled up when in repose; body often dusted with whitish wax.

EXAMPLE: Cimbex femoratus (large birch sawfly).

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