15a (14b). Body quite hard, wasplike insects; clypeus not elongated; the abdomen often

constricted at base, 1st abdominal segment fused to thorax; fore wings distinctly larger

than hind wings and with fewer veins; front wings with 20 or less cells (Figs.A-G)

[sawflies, bees and wasps]..............................................................................Hymenoptera...118

 

 

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A B C D

 

E F

 

 

15b. Body soft, not wasplike, the abdomen not constricted at base; hind wings about the same

size as front wings and usually with about as many veins; front wings frequently with more

than 20 cells....................................................................................................................... 16