910 AN INTRODUCTION TO ENTOMOLOGY 



LL. Abdomen immargined laterally (acute in Tele- 

 nominae but without a carina). 

 M. Forewings with a distinct stigma. 



N. A closed, usually very short, marginal cell 

 (2d Ri + R2) present. Antennas of thirteen 

 segments. Abdomen with a short cylindrical 

 petiole, the second segment much longer and 

 larger than the others, p. 931 . .Proctotrupid^ 

 NN. No closed marginal cell (2d Ri + R2) but the 

 basal part of the marginal vein (vein r) often 

 present in the forewings. 

 O. Antennae of eleven segments. (Megas- 



pilinse.) p. 932 Ceraphronid^ 



00. Antennae of twelve or more segments (a 

 few genera of Diapriinas). p. 932 . . . Belytid^ 

 MM. Forewings without a distinct stigma. 



N. Costal cell (C + Sci) either closed along the 

 margin, or if open very narrow; the marginal 

 cell (2d Ri + R2) if present narrowly triangular, 

 its proximal margin a straight line: Abdomen 

 not compressed nor dorsally keeled. Hypo- 

 pygium of the female not divided, but closely 

 applied to the pygidium, the ovipositor issuing 

 from between them at the tip of the abdomen. 

 O. Hind wings with a closed median cell (M). 

 Forewings almost invariably with a closed 

 marginal cell (2d Ri + R2). Antennae of four- 

 teen or fifteen segments. (Belytinae.) p. 932 



Belytid^ 



00. Hind wings without any closed cells; 

 forewings without a closed marginal cell 

 (2d Ri + R2). 



P. Abdomen margined laterally, the margin 

 acute but not sharply carinate. Antennae 

 arising from near the clypeus and composed 

 of ten to twelve segments. Scutellum 

 not divided into three lobes. (Telenominae.) 



p. 933 SCELIONID.^ 



PP. Abdomen not at all margined laterally. 

 Scutellum divided by two oblique curved 

 impressed lines into three lobes. (Calli- 



ceratinae.) p. 932 Ceraphronid.^ 



NN. Costal cell (C + Sci) open along the costal 

 margin and abnormally wide. The marginal 

 cell (2d Ri + R2) present; often closed; often 

 open along the costal margin, sometimes at tip; 

 it is always four-sided, acute at apex and at its 

 base. Abdomen more or less strongly com- 

 pressed and with a mid-dorsal keel, if rarely but 

 little compressed and without a keel, it is more or 

 less swollen dorsally. Hypopygium of the female 

 divided, the ovipositor issuing from the cleft 

 thus formed, anterior to the apex of the ab- 



do*men. p. 934 Cynipid^ 



HH. The pronotum not reaching the tegulae, separated there- 

 from by a chitinized sclerite, the prepectus. Antennae el- 

 bowed, never more than thirteen-segmented. Fore wings with 

 a short, narrow costal cell open along its anterior margin 

 (Fig. 1 166); its apex remote from the stigmal vein (Fig. 1166, 

 d); a more or less elongate marginal vein (Fig. 1166, b)\ 

 postmarginal and a stigmal spur (Fig. 1166, d). An occasional 



