608 THE STUDY OF IXSECTS. 



E. Borders of the mesoscutum intervening between the pro- 

 notum and the tegulae (Fig. 738) ; ovipositor issuing be- 

 fore the apex of the abdomen, p. 628 ..... CHALCIDID.E. 



EE. Pronotum extending to the tegulae (Fig. 739); oviposi- 

 tor issuing from the apex of the abdomen, p. 630. 



DD. Fore wings with several closed cells, or at least with a 

 closed or nearly closed marginal or submarginal cell.* 

 E. Fore wings without a stigma, p. 615 ......... CV 



EE. Fore wings with a stigma. 



F. Fore wing with the vein between cells Vi and ist \~- 2 

 wanting (Fig. 740). 



G. Veins I-1II of the fore wing consolidated from the 



base of the wing to the stigma, p. 625. . BRACONID/E. 



GG. Base of fore wing with a cell between veins I and 



III. p. 624 .......................... STEPHANIDyE. 



FF. Fore wing with cells Vi and ist V 2 separate (Fig. 741 ). 



G. Veins I-III of fore wing consolidated from the base 



of the wing to the stigma, p. 621 . . .ICHNEUMONID^E. 



GG. Base of fore wing with a cell between veins I and 



III. p. 621 ........................ TRIGOXALID.*:. 



AA. Trochanters of the posterior legs, consisting each of a single 

 segment (Fig. 737, <r) ; caudal end of body in female usually fur- 

 nished with a sting. (Suborder ACULEATA.) 

 B. Fore wing with no closed submarginal cells. 



C. Abdomen long; antennae long, not elbowed, threadlike ; body 

 smooth and polished, black, p. 631 ........... PELECINID.E. 



CC. Abdomen but little longer than the head and thorax ; an- 

 tennae short, elbowed ; body adorned with metallic colors, and 

 often coarsely and deeply sculptured. 632 ....... CHRYSIDID^E. 



BB. Fore wing with at least one closed submarginal cell. 



C. First abdominal segment, and sometimes the second also, 

 forming a lens-shaped scale or knot (Fig. 742); base of front 

 wing not protected by a tegula. p. 633 .......... FORMICINA. 



CC. Basal part of abdomen without a knot. 



D. First segment of posterior tarsi cylindrical and naked, or 

 with but little hair; hairs clothing thorax simple. 

 E. Wings not plated when at rest. p. 644. ...... SPHECIXA. 



* Very rarely the wings are without closed cells in some Evaniidae and 

 Braconidre. 



