178 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii4 



edge, the third pair black with ventral sui'face yeUow; fore trochanters 

 yellow, second pair yellowish suffused with black, last pair black; 

 first two pairs femora yeUow, posterior pair black at base and apex; 

 foretibiae yellow, rest black; foremetatarsal joints dark yellowish, 

 rest of foretarsi dark; all last two pairs tarsi dark; wings hyaline, veins 

 and stigma very dark yellowish; two-thirds of apical margin of clypeus 

 in the middle with edge straight the outer front corners with an 

 expanded, transparent lip or broad tooth which extends forward, 

 making the front margin a concavity with the inner edge straight, 

 with a narrow rim; clypeus 2.0 as broad as long; antennae lost after 

 third joint, yellow beneath, black above; relative length third joint 

 is 10; upper interoculai' distance (14) slightly greater than the lower 

 (12); head 1.25 as broad as long; very little pubescence anywhere 

 except clypeus and face; parameres of medium size for genus, rather 

 long, 2.0 as long as volsellae; volsellae with concavity as apex rather 

 shallow; parapenial lobes rather broad, almost as broad below as 

 near apex; subgenital plate with the basal triangle very narrow at base, 

 closed about apical fourth; sixth sternite with an apical, triangular 

 projection in middle of the deeply concave apex. 



Length head and thorax 4.6 mm., abdomen 3.0 mm., fore^\^ngs 7.0 

 mm., rear wings 5.3 mm.; genitaha length 0.90 mm., width 0.53 mm., 

 length of subgenital plate 1.12 mm., width 0.40 mm. 



Holotype male:Barro Colorado Island, C.Z., Apr. 5, 1939, Zetek 

 4420, lot no. 39-11659 (USNM). 



43. Auplopus marginalis, new species 



Figures 26, 27 



Holotype male. Clypeus and face ^\^th 0.67 of the clypeus white 

 on outer edges about 0.33 in the middle brown; inner orbits broadly 

 white from clypeus to antennae from where the white reduces to a point 

 half way to foreocellus; front, vertex, and dorsum of thorax (except 

 postscutellum, which is black) a blue green, with purple reflection; 

 sides of thorax more greenish colored; abdomen black, the first 

 tergite with a slightly yellowish streak in middle of sides, and the 

 apical tergite, white; antennae reddish yellow below, black above; 

 forecoxae yellowish (black at base), the last two paii's greenish; 

 foretrochanters yellow, middle pair yellow with a little black, last 

 pau* black; all femora yeUow, foretibiae yellow, midtibiae yellow 

 beneath dark above, last tibiae all dark; metatarsal joint of forelegs 

 yeUow, last four joints dark; all tarsi of last two pairs dark; clypeus 

 with a very broad transparent rim across the whole truncate front 

 margin and the side pieces; clypeus not quite 2.0 as broad as long; head 

 1.3 as broad as long; ratio of lengths of third and fourth antennal 

 joints is 9 :9; upper interocular distance (13) shghtly greater than lower 



