NO. 22.] HYMENOPTERA OF CONNECTICUT. 445 



7. Pronotum large; antennae many jointed; notauli complete.. 8 

 Pronotum small, frequently not visible in the middle; anten- 

 nae usually with few joints 9 



8. Body not metallic; sides of scutel almost straight 



EURYTOMID^E p. 517 

 Body metallic; sides of scutel curved CALLIMOMID^E p. 512 



9. Mesosternal pleurae not visible; mid legs long, saltatorial, 



with a very long tibial spur 10 



Mesosternal pleurae distinct; mid legs not saltatorial, first 

 tarsal joint not swollen 12 



10. Antennae more than 6-jointed 11 



Antennae 6-jointed; marginal vein about as long as subcostal 



vein SIGNIPHORID^E p. 506 



11. Antennae 13-jointed; occipital margin of vertex rounded 



EUPELMID.E p. 507 

 Antennae 11-jointed; occipital margin of vertex usually 

 acute; notauli obliterated ENCYRTID^ p. 491 



12. Antennae 12- or 13-jointed 13 



Antennae 8-jointed; notauli distinct; middle tibial spur 



moderately long APHELINIDyE p. 487 



13. Antennae 12-jointed 14 



Antennae 13-jointed, with two ring-joints and three joints 



to the club; occipital line incomplete 



pteromalid;e p . 468 



14. Abdomen distinctly petiolate; occipital line complete 



SPALANGIID.E p. 484 

 Abdomen almost sessile; pronotum scarcely visible in the 

 middle, submarginal vein subangulate, stigmal club often 



large, notauli distinct; funicle of antennae 5-jointed 



TRIDYMID.E p. 486 



15. Tarsi 4-jointed 16 



Tarsi 3-jointed; pubescence of wings arranged linearly.... 



TRICHOGRAMMID^ p. 449 



16. Submarginal vein entire, furnished with many bristles, post- 



marginal distinct; hind tibiae sometimes with two spurs.... 17 

 Submarginal vein broken, postmarginal sometimes wanting; 

 hind tibiae with one spur; male antennae simple 19 



17. Abdomen sessile or with a distinct petiole that is transverse 



and smooth; notauli either absent or else represented only 



by very slight impressions 18 



Abdomen usually with a distinct petiole; notauli very dis- 

 tinct; antennae inserted below middle of face, simple in 

 male ELACHERTID/E p. 464 



18. Hind coxae very large and strongly compressed; head semi- 



globose, front deeply, sparsely punctate; antennae fiabel- 



late in male ELASMID.E p. 463 



Hind coxae normal; postmarginal and stigmal veins rather 

 long; antennae often flabellate in male. .EULOPHID^E p. 460 



