NO. 1206. ICHNEUMON FLIES— ASHMEAD. 195 



8. Clypeus posteriorly usually carinate or produced between the insertion of the 

 antennae so that its basal margin is beyond a line drawn from their 

 base; anteriorly it is often rostriform carinate, or at least more or 

 less produced medially; metathorax usually long, abruptly truncate 

 posteriorly with the angles acute or toothed, although sometimes 

 the angles are rounded; pronotum rather long, conically produced. 



Family XXYI. AMi'ULiciDiE, 



SuperfaiTiily III. VESrOIDE^SL. 



TABLE OF FAMILIES. 



Abdomen either sessile or petiolate, with the first ventral .segment distinctly sepa- 

 rated from the second by a more or less deep constriction or transvefse 

 furrow ; legs most frequently fossorial 5 



Abdomen either sessile or petiolate, but the second ventral segment not separated 

 from the first by a strong constriction or transverse furrow; if some- 

 what constricted, then the legs are not fossorial and the wings are 

 usually folded in repose; in the former case the legs may be either 

 fossorial or simple. 

 Posterior legs usually short, the femora rarely reaching to or at least extending 

 much beyond the middle of the abdomen; legs most frequently not 



fossorial : 2 



Posterior legs long, tiie femora most frequently reaching to or beyond the tip 

 of the abdomen; tibiae in female most frequently serrate or spinous, 

 more rarely entirely smooth; middle tibiae with two apical spurs. 



Family XXVII. Pompilid^e. 



2. Wings not folded in repose ; female sometimes apterous 3 



Wings folded in repose; never apterous. - 



Claws simple; middle tibiae with two apical spurs; sexes three, female, worker, 

 male Family XXVIII. Vespid^. 



Claws with one or more teeth beneath; middle tibiae with one or two apical 

 spurs; sexes two, female and male Family XXIX. Eumenid.^. 



3. IMetathoracic angles usually acutely produced, the metanotum posteriorly con- 



cave; scutellum large, flat, convex, conical, or spined; if the meta- 

 thoracic angles are rounded, which occurs rarely, the abdomen has 

 only from 3 to 5 visible segments. 



Abdomen normal, with at least 6 distinct segments, the venter flat; antennae 

 usually strongly clavate, in female knobbed at aj)ex; scutellum very 

 large, flat; species ?io< metallic; antennae never more than 12-jointed. 



Family XXX. Masaridje. 



Abdomen abnormal, with from 3 to 5 visible segments, the terminal segments 

 most frequently retractile, telescopic-like, the venter concave or flat; 

 species metallic; antennae most frequently filiform, inserted close 

 to the anterior border of the head, 13-jointed; scutellum convex, 



conical, or spined, rarely flat Family XXXI. Chrysidid^. 



Metathoracic angles rarely toothed or acutely produced, the metanotum poste- 

 riorly squarely truncate or rounded, not concave; scutellum normal, 

 or in some wingless females entirely absent; antenna3 filiform or 

 subclavate, rarely flabellate in some males; abdomen always with 

 more than 5 dorsal segments. 



Hind wings vAth a distinct venation, and always without anal lobes; females 

 never apterous 4 



