908 AN INTRODUCTION TO ENTOMOLOGY 



LL. Abdomen immargined laterally (acute in Tele- 

 nominse but without a carina). 

 M. Forewings with a distinct stigma. 



N. A closed, usually very short, marginal cell 

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

 segments. Abdomen with a short clyindrical 

 petiole, the second segment much longer and 

 larger than the others, p. 921 . 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. Antennas of eleven segments. (Megas- 



pilinffi). p. 921 CERAPHRONIDiE 



00. Antennae of twelve or more segments (a 

 few genera of Diapriinae). p. 921 . Belytid^e 

 MM. Forewings without a distinct stigma. 



N. Costal cell (C + Sc) 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 issuine 

 from between them at the tip of the abdomen. 

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

 Forewings almost invariably with a closed 

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

 teen or fifteen segments. (Belytinffi). p. 921. 



Belytid^ 



00. Hind wings without any closed cells; 

 forewings without a closed marginal cell 

 (2d R, + R2). 



P. Abdomen margined laterally, the margin 



acute but not sharply carinate. Antennas 



' arising from near the clypeus and composed 



♦ of ten to twelve segments. Scutellum 



not divided into three lobes. (Talenominae). 



p. 921 SCELIONID.^ 



PP. Abdomen not at all margined laterally. 

 Scutellum divided by two oblique curved 

 impressed lines into three lobes. (Calli- 



ceratinae). p. 921 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 tnargin, 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- 

 domen, p. 922 CvNIPlDiE 



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

 from by a chitinized sclerite, the prepectus. Antennse 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. 1 166, d). An occasional 



