512 PROCEEDINGS OF THE NAlTLONlAL MUSEUM vol. 93 



18. Length of ocellocular line nearly twice as great as maximum diameter of 

 lateral ocellus; propodeum long, its mesal length one-third as great as 

 length of mesoscutellum ; all femora light yellow or white; male antenna 



with long bristles, as in fig. 16, I ainsliei Gahan (p. 537) 



Length of ocellocular line only slightly greater than maximum diameter of 

 lateral ocellus ; propodeum shorter, its mesal length only one-sixth as great as 

 length of mesoscutellum ; front and middle femora partly tan; male antenna 



with short bristles, as in fig. It'., j whitmani (Girault) (p. 538) 



lit. Mesopraescutum with numerous, slightly irregular longitudinal rugae on 

 meson, and whole dorsum of thorax with extremely coarse sculpture. 



gelastus, new species (p. 539) 



Mesopraescutum without longitudinal rugae on meson; dorsum of thorax not 



so coarsely sculptured 20 



20. Body very dark, iridescent blue or blue-green: propodeum extremely short, 



its mesal length only one-fifth as great as length of mesoscutellum; abdo- 

 men long and narrow, at most only one-half as wide as maximum width 

 of thorax; base of gaster broadly joined to propodeum; propodeal spiracles 

 minute, almost round and nearly touching anterior margin of propodeum. 



malacosomae Girault (p. 539) 

 Not having that combination of characters 21 



21. Submarginal vein of forewing with only one dorsal bristle, as in fig. 



20. a-c 22 



Submarginal vein of forewing with two to seven dorsal bristles 36 



22. Only two bristles present at each lateral margin of mesopraescutum 23 



At least three bristles present at each lateral margin of mesopraescutum.- 25 



23. Thorax elongate, with mesopraescutum as long as wide; postscutellum and 



propodeum smooth ; anterior and posterior praescutal bristles approxi- 

 mately the same size baldufi, new species (p. f>40) 



Thorax broad and compact, with mesopraescutum much wider than long; 

 postscutellum and propodeum with distinct, netlike sculpturing; posterior 

 praescutal bristles larger and longer than anterior ones 24 



24. Surface of forewing uniformly ciliated on area just distad of point of con- 



junction of submarginal and marginal veins (fig. 20, e) ; antennae slender, 

 elongate, first funicle segment twice as long as broad, club only slightly 

 wider than third funicle segment (fig. 1G, /<) ; metatibiae almost always 



entirely yellow dyrus, new species (p. 541) 



Surface of forewing with a large bare area just distad of point of conjunction 

 of submarinal and marginal veins (fig. 20, d) ; antennae more compact, 

 first funicle segment as broad as long, club considerably wider than third 

 funicle segment (fig. 16, i) ; metatibiae always partly dark brown or 

 black triozae, new species (p. ." c_>) 



25. Body dark, iridescent blue; scape yellow and quite short, its apex far from 



reaching level of anterior ocellus; flagellum brown; femora mostly dark 

 brown or black; gaster slender, not so wide as thorax, but only slightly 

 longer than thorax; stigmal vein of forewing with a slender anterior spur 

 (fig. 20, c) ; propodeal spiracles separated from anterior margin of pro- 

 podeum by space equal to the diameter of a spiracle. 



ovipransus Crosby and Leonard (p. ."i44) 



Not having that combination of characters 26 



2G. Propodeum with a median carina, but without paraspiracular carinae, as 

 in fig. 21, e, f ; surface of propodeum smooth or very weakly sculptured- 27 



Propodeum witli both median and paraspiracular carinae, as in fig. 21, a-d] 

 surface of propodeum strongly shagreened or sculptured 28 



