446 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



19. Submarginal vein either ornate or provided with two bristles; 

 metapleurae very small; scutel with two bristles near the 



miildle ENTEDONTID^ p. 455 



Submarginal vein with from one to five bristles; meta- 

 pleurae triangular, not small; postmarginal vein usually ab- 

 sent; scutel with four bristles, all behind the middle, often 

 with two longitudinally impressed lines; abdomen sessile 



TETRASTICHID^ p. 4SI 



mymarid;e. 



To this family belong some of the smallest of insects. All 



of its species, so far as known, are parasites in the eggs of other 



insects. 



Key to Genera. 



1. Tarsi 4-jointed 2 



Tarsi 5-jointed 3 



2. Abdomen distinctly petiolate; female with its antennal club 



not jointed, but solid; marginal vein punctiform; antennae 

 9-jointed; marginal vein in male as in female; antennae 



in male 13-jointed Polynema p. 446 



Abdomen sessile or subsessile; marginal vein lengthened; an- 

 tennae 9-jointed in female, 12-jointed in male. .Anaphes p. 447 



3. Abdomen not petiolate 4 



Abdomen petiolate; antennae 9-jointed in female, lo-jointed 



in male Camptotera p. 448 



4. Females 5 



Males 8 



5. Antennae with more than eight joints 7 



Antennae 8-jointed 6 



6. Marginal vein long Leimacis p. 448 



Marginal vein short Alaptus p. 448 



7. Antennae 9-jointed; marginal vein long Litus 



Antennae ii-jointed; marginal vein short . . . . Gonatocerus p. 449 



8. Marginal vein short 10 



Marginal vein long 9 



9. Antennae ii-jointed .Leimacis p. 448 



Antennae 13-jointed Litus 



10. Antennae lo-jointed 1 Alaptus p. 448 



Antennae 13-jointed Gonatocerus p. 449 



Polynema Haliday. 

 Cosmocoma Foerster. 

 °P. howardi Ashmead. Cosmocoma elegans Howard. 

 Male : length 0.9 mm. ; antennae distinctly longer than the 

 body, pedicel bulbous, much broader than the succeeding joint; 



