588 PROCEEDINGS O'F THE NA/TTONAiL MUSEUM vol. 93 



anterior tibiae tan or brown, middle and hind tibiae sometimes 

 slightly darkened. 



Female. — Length, 1.4-1.8 mm. Antennae inserted at level of ven- 

 tral margins of compound eyes; first funicle segment as long as 

 pedicel, all funicle segments equal in length and each as long as wide; 

 club as long as two funicle segments combined ; length of malar space 

 three-fourths height of compound eye ; postocellar line two and one- 

 half times as long as ocellocular. Mesopraescutum as long as wide 

 and bearing two rows of bristles at each lateral margin ; disk of meso- 

 pleuron smooth; submarginal vein of forewing with two or three 

 dorsal bristles; apex of hindwing blunt, fringe at posterior margin 

 one-fifth as wide as wing at hamuli. Surface of propodeum smooth, 

 paraspiracular carinae wanting (fig. 21, e) ; mesal length of propo- 

 deum one-fourth length of mesoscutellum ; propodeal spiracles al- 

 most round, not quite touching anterior margin; gaster equal to or 

 slightly longer than thorax. 



Male.— Length, 1.1-1.5 mm. Pedicel enlarged, globose, as long as 

 first funicle segment, second funicle segment slightly longer than 

 first, third and fourth segments equal and each as long as second, 

 funicle segments subglobose, bearing setae only one-half longer than 

 themselves; club four-fifths as long as three apical funicle segments; 

 gaster and thorax equal in length. 



Type locality. — England. 



Types. — In the British Museum; specimens compared with types by 

 Dr. Ch. Ferriere. 



Host. — Apanteles glomeratus (Linnaeus) parasitic on the cabbage 

 butterfly, Pieris rapae (Linnaeus). 



Distribution. — Probably worldwide; generally distributed both in 

 Europe and North America. 



TETRASTICHUS MICRORHOPALAE Ashmead 



Tetrastichus microrhopalae Ashmead, Trans. Amer. Ent. Soc, vol. 23, p. 234, 

 1896.— Chittenden, U. S. Bur. Ent. Bull. 38 (n. s.), p. 88, 1902.— Girault, 

 Societas Eutomologica, vol. 31, p. 36, 1916. 



Brown, with faint greenish iridescence; trochanters, apices of fe- 

 mora, tibiae, and basal segments of middle and hind tarsi white or 

 yellow. 



Female.— Length, 1.1-1.3 mm. Antennae inserted at level of ven- 

 tral margins of compound eyes; apex of scape not reaching level of 

 anterior ocellus, first funicle segment one-quarter shorter than pedicel, 

 second segment equal to pedicel, third slightly longer, club equal to 

 second and third funicle segments combined; length of malar space 

 three-fifths height of compound eye; postocellar line three times as 

 long as ocellocular. Mesopraescutum slightly wider than long and 



