152 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lu 



and all the trochanters yellow; antennae yellow below, brown or black 

 above; mouth parts bright yellow, thorax with at least some parts strongly 

 bluish or greenish; abdomen with a violaceous color not black; dorsal 

 surface of last tergite white; space below antennae white or bluish . . 18 



18. Face and clypeus appearing all white in certain light, in other light middle 



third is brown, the white reaching antennae below and on sides; front 

 just above antennae with a blue-greenish stripe which covers lower half 

 of front; upper half of front, vertex posterior orbits, dorsal surface or 

 thorax, and most of sides of thorax, black; the sides of thorax just above 

 middle coxae bluish green; abdomen brownish, slightly violaceous; first 

 two pairs of coxae yellowish; posterior tibiae black on dorsal surface; 

 genitalia and subgenital plate larger than in inarginalis; the basal triangle 

 on subgenital plate closed about apical third; length 7.6 mm. Panama. 



Figs. 8, 9 42. argentiniis, new species 



Face and clypeus with a dark browTi stripe in middle third in any reflection, 

 the white of face not reaching antennae either on sides or below; the face 

 bluish green just below antennae; the rest of head and all thorax green or 

 bluish green, with very strong purple reflection; abdomen similar in color 

 to argentinv.s; only the forecoxae yellowish; posterior tibiae purplish on 

 dorsal surface; basal triangle on subgenital plate closed at basal third; 

 length 7.3 mm; while length is the same as argentiniis the subgenital plate 

 is hardly half as large. Mexico. Figs. 26, 27. 



43. niarginalis, new species 



19. Head, thorax, and abdomen black with no trace of color; face and clypeus 



whitish with a dark streak in middle; only the first pair coxae yellowish, 

 last two pairs black; all femora yellowish but last pair black at base and/or 



at tip; veins of wings dark yellowish or black 20 



Head and thorax barely showing bluish in reflected light; propodeum and 

 dorsum of thorax showing beautiful purple sheen in certain light; only a 

 trace of a brown streak in middle of clypeus, but darker on face; first two 

 pairs coxae and trochanters yellow, last pair black; all femora and first 

 two pairs tibiae yellow; foretarsi almost all yellow, posterior tibiae and last 

 two pairs tarsi dark; veins of wing and stigma yellow. Mexico, Honduras. 

 Figs. 20, 21 38. woodi, new species 



20. All the femora yellowish but last pair black at base and apex; wing veins 



light yellowish; last two pairs tibiae black; last four joints of foretibiae and 

 all last two pairs black; subgenital plate with raised basal triangle open 

 almost to apex of plate; parameres of genitalia broader and slightly shorter; 

 volsellae broader and longer. Panama. Figs. 6, 7. 



53. gertschi, new species 

 All femora yellowish but last pair black at base only; wing veins dark yel- 

 lowish; all tibiae yellowish; only last two joints of foretarsi dark, the first 

 tarsal joints of last two pairs dark reddish, remaining joints black; parameres 

 of genitalia more slender and slightly longer than above. Mexico. Figs. 

 40, 41 44. atratus, new species 



21. All coxae and trochanters reddish; first antennal joint yellow above and 



below; last three antennal joints abnormal, flattened and widened; all the 

 legs yellowish except tarsal joints of last two pairs of legs; sides and ventral 

 surface of pronotum or most of it yellowish; dorsal surface of pronotum 

 and mesonotum bluish green, propodeum black except in certain light a 

 trace of color; thorax with some reddish color on sides and on dorsal surface 

 of propodeum; abdomen black. Panama. Figs. 12, 13. 



36. abnornaalis, new species 



