942 AN INTRODUCTION TO ENTOMOLOGY 



an imaginary line drawn from tegula to tegula; anterior tibial spur small 



and weak 



D. Hind coxa extremely large and disc-like; hind tarsus very long. p. 948 



Elasmin^ 



DD. Hind coxa of approximately normal size, more or less cylindrical; 



hind tarsus of normal length, p. 947 Eulophin^ 



CC. Tarsi with five segments; axilla normal, not produced on mesonotum 

 forward of the tegula; anterior tibial spur larger and strong. 

 D. Hind femur much enlarged and with a row of teeth beneath. 



E. Hind tibia ending in a long spine beyond the insertion of the tarsus 

 and with a single weak apical spur. 

 F. Prepectus a large triangular sclerite; thorax metallic green 



(genus Podagrion). p. 943 Ormyrin^ 



FF. Prepectus a small almost completely hidden sclerite; thorax 



never metallic green, p. 944 Chalcidin.-e 



EE. Hind tibia rather squarely truncate and with two apical spurs. 

 F. Wings folded longitudinally in repose; ovipositor recurved over 



dorsum of abdomen, p. 947 Leucospidin^ 



FF. Wings never folded ; ovipositor not recurved, p. 946 Cleonymin^ 

 DD. Hind femur of more normal size and with not more than two teeth 

 beneath. 



E. Alesopleurum large and evenly convex, without a groove for the 



femur; apical spur of middle tibia long and stout, p. 946 Encyrtin^ 



EE. Mesopleurum with a groove for the reception of the femur; 



apical spur of middle tibia not stout. 



F. Pronotum above with only an anterior face, not visible from the 



dorsal aspect; mandible sickle-shaped, p. 944 Eucharin^ 



FF. Pronotum above with a dorsal face so that it is easily visible 

 from above. 



G. Thorax very robust and short; abdomen small, oval, polished, 

 and entirely or largely enclosed by the second or the fused second 



and third tergites. p. 944 Perilampin^ 



GG. Thorax and abdomen not as above, of more normal propor- 

 tions. 



H. Head of female long, oblong, and with a deep longitudinal 

 groove above; front and hind femora and tibiae stout, the 

 middle ones slender; male wingless with three- to nine-seg- 

 mented antenna, p. 943 Agaontin^ 



HH. Not as above. 



I. Hind tibia with one apical spur; head often large, in front 

 often wide and flat with a reticulate surface and strias 

 converging to the mouth, p. 947 Pteromalin^e 



II. Hind tibia with two apical spurs, one of which may be 

 quite small; head usually not as above. 



J. Hind coxa usually large and with more or less of a ridge 

 above; abdomen usually compressed and the ovipositor 



usually long. p. 943 Ormyrin^ 



JJ. Hind coxa not enlarged, rather cylindrical in cross 

 section; ovipositor not or slightly surpassing the tip of 

 the abdomen. 



K. Pronotum large, quadrate and as wide as the meso- 

 notum; color black or brown, never metallic; abdomen 



usually compressed, p. 945 Eurytomin.'E 



KK. Pronotum short transverse, conical or conically 

 produced anteriorly and narrower than the mesonotum; 

 color often metallic greenish; abdomen usually de- 

 pressed. 

 L. Mesepisternum large; front or hind femur often 



enlarged, p. 946 Cleonymin.« 



LL. Mesepisternum not unusually large; neither front 

 nor hind femur enlarged; species resembling the 

 Pteromalinag. p. 947 Miscogasterin^ 



