164 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



femora and tibiae all same color; foretarsi and middle tarsi except last 

 two joints, basitarsi of posterior tarsi, red, last four joints lost; 

 antennae black, except last two joints yellowish; apex of mandibles 

 reddish, the labial palpi yellow, other mouth parts darker; clypeus of 

 usual shape, 1.8 as broad as long; upper interocular distance (17) 

 about equal to the lower; head slightly broader (32) than long (30); 

 ratio of length of third and fourth antennal joints is 11 :10; clypeus and 

 face with prostrate, silvery pubescence as well as upright hair, giving 

 a rather rough appearance ;' wings deep brownish yellow, tegula, veins, 

 and stigma yellow; propodeum with a patch of silvery pubescence on 

 the posterior outside corners; longer spur of posterior tibiae two tliu'ds 

 as long as its metatarsal joint; abdomen shining pruinose. 



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

 6.7 mm., rear wing 4.6 mm. 



Specimens from Costa Rica, July 24, 1955, no. 631-357, M.S.V. 

 (locality illegible) (USNM); Acayucan, Vera Cruz, Mexico, Oct. 23, 

 1957, R. and K. Dreisbach (RRD); Xilitla, San Luis Potosi, Mexico, 

 July 23, 1954, R. R. Dreisbach (RRD). 



18. Auplopus olivariis, new species 



Holotype female. Clypeus black, head and mesonotum dull green, 

 propodeum and sides of thorax, brighter shining green; abdomen 

 black, with no noticeable colored reflection, shining and with prostrate 

 pruinose pubescence; antennae brown underneath, black on top; 

 apex mandibles reddish, mouth parts dark brown; coxae and tro- 

 chanters black; all femora and the first two pahs of tibiae reddish; 

 forebasitarsi reddish, but darker than tibiae, and the rest of tarsal 

 joints black; head and thorax pretty well covered with a somewhat 

 coarse, prostrate, brownish pubescence; clypeus as usual, a trifle over 

 2.0 as broad as long; ratio of length of third antennal joint to fourth is 

 11:9; upper interocular distance (14) equal to the lower; head 1.2 as 

 broad as long; foreocellus the largest, the laterals 1.5 as far from eyes 

 as each other; wings, clear, hyaline, the fii'st recmTent vein meets the 

 second cubital cell at middle, the second recurrent meets third cubital 

 cell at basal 0.2 (much closer to base than any other species) ; abdomen 

 shining with a faint bluish tinge; longer spur of posterior tibiae about 

 0.4 as long as its metatarsal joint. 



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

 7.3 mm., rear wing 4.6 mm. 



Holotype female: Barro Colorado Island, C.Z., June 14, 1939, Zetek 

 4453, lot no. 39-1257 (USNM). 



