160 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



tibiae dark; clypeus as usual, twice as broad as long; head 1.2 as broad 

 as long; upper interocular distance (18) equal to the lower; length 

 third joint antennae 13 (rest of antennae lost) compared to 18 vertex 

 width, the second and third joint (16) not quite equal to vertex width; 

 wings hyaline, with brilliant slightly yellowish reflection, the veins 

 and stigma black; the basal veins in forewings disjointed about the 

 width of a vein, in rear wings subdiscoidal basad of cubitus by about 

 twice thickness of a vein; propodeum with only a very slight slope, 

 broad almost flat; clypeus and face silvery sericeous, slightly sericeous, 

 slightly sericeous on parts of thorax, sides of propodeum and outer 

 posterior corners strongly sericeous; posterior half of propodeum with 

 long, upright whitish hair, head and thorax with generally shorter and 

 less hair. 



Length head and thorax 4.6 mm., abdomen 4.0 mm., forewing 7.5 

 mm., rear wing 5.6 mm. 



Holotype female: Palmar, Prov. Puntareanas, Costa Rica. P. & 

 D. AHen (USNM). 



12. Auplopus exilis, new species 



Holotype female. Clypeus black, head and thorax green with some 

 purplish reflection, abdomen brown with the faintest trace of bluish 

 in certain light, shining, almost covered with very fine prostrate 

 pubescence, pruinose; very tip of clypeus, and apex of mandibles 

 faint yellowish; mouth parts bright yellowish, with the basal joints 

 of palpi brownish; hair beard on mentum with hairs rather thick and 

 almost black, very prominent in comparison with the other yellow 

 parts; coxae black with pm-ple reflection, trochanters dark, yellowish 

 below; all femora and fu'st two pairs of tibiae bright yellow; basal two 

 joints of forelegs yellow, last three joints and tarsi of last two pairs of 

 legs dark; tibiae of posterior legs dark in certain light with slight purple 

 reflection, in other light dull reddish, but much darker than other tibiae 

 and femora; antennae yellowish underneath except last joint which 

 is black, brown above but last joint darker, very slender; clypeus as 

 usual, twice as broad as long, clypeus, face and sides of propodeum 

 with densely, silvery, prostrate pubescence, the sides and ventral 

 surface of thorax about the same; ratio of length of third and foiu-th 

 antennal joint is 11:9; head 1.25 as broad as long; upper interocular 

 distance (13) equal to the lower; wings hyaline, brilliant reflection in 

 reflected light; longer spur of posterior tibiae 0.7 as long as its meta- 

 tarsal joint. 



Length head and thorax 4.0 mm., abdomen 4.3 mm., forewing 6.3 

 mm., rear wing 4.6 mm. 



