222 MANUAL OF NATURAL HISTORY 



I. 8 UB- ORDER. — STINGLESS-H YMENOPTERA 

 (Terebrantia). 



Abdomen of females furnished with a saw or 

 borer for depositing the eggs. 



I. TRIBE. — Saw-beaeing Hymenopteka (Securifera). 



Abdomen sessile ; larvae with a well-developed 

 mandibulated mouth. Feeding upon vegetable 

 matter. 



1. Family. — Saw-Flies (Tenthredinidae). Antennae 

 variable, usually short, of males often pecti- 

 nate, furcate, or flabellate; mandibles elon- 

 gate, narrow, compressed, toothed; thorax 

 solid, broader than head ; abdomen sessile, 

 of female furnished with a pair of saws ; 

 wings ample, with numerous complete cells ; 

 hind-tibiae often spurred. Introduce their 

 eggs by sawing edges of leaves, or by making 

 incisions in their surface. 



1 . Tenthredinince. — Antennae 9 — 1 1 -jointed, 



simple, filiform to tip ; labrum apparent ; 

 saws with parallel sides. 



2. Cimbicince. — Antenna short, clavate, with 



not more than eight joints ; larvae 22-footed, 

 emitting drops of viscid matter. 



3. Hylotomince. — Antennae 3-jointed, terminal 



joint greatly elongated ; labrum apparent ; 

 larvae 18 — 20-footed, not emitting drops of 

 viscid matter. 



4. Lydince. — Antennae many-jointed, sometimes 



