NEW SPIDER WASPS — DREISBACH 147 



black; wings dusky with black veins and stigma; legs more reddish than 

 the following; abdomen reflecting purple; length 8.6 mm. Guatemala. 



15. guatemalensis, new species 

 Basal joint of foretarsi yellow, but not as bright colored as rest of legs; either 

 with antennae black and abdomen black (a definite violet tinge) or anten- 

 nae strongly yellowish beneath 42 



42. Antennae black and abdomen almost black (slightly violet in certain light); 



foretibiae yellowish, the middle one definitely yellow in certain light but 

 dark-colored in other reflection; basal joint of foretarsi yellow, rest of 

 joints of foretarsi and all joints of last two pairs dark; wings hyaline, veins 

 and stigma dark; ratio of length of third and fourth antennal joints is 11:8; 

 eyes deeply concave on inner orbits but upper and lower interocular dis- 

 tance equal, 14 on same scale as antennal measurement; lateral ocelli 1.3 

 as far from eyes as each other; length 8.0 mm. Barro Colorado Island. 



18. olivanis, new species 



Antennae yellowish on basal half or more underneath and abdomen strongly 



purple or bluish 43 



43. With a very prominent white streak on lower inner orbits; antennae yellow 



underneath whole length, brown dorsally, the last four joints much flattened 

 and distorted; ratio of length of third and fourth antennal joints is 16:13, 

 the comparable vertex width 16; lower interocular distance is 16; head 

 light green, thorax about same shade of green but with violet reflection, 

 especially on propodeum; abdomen strongly violaceous, shining; all tibiae 

 red in certain light but last two pairs darker in other light; dorsal surface 

 of posterior tibiae dark reddish in reflected light; wings yellowish, veins and 

 stigma bright yellow; length 9.3 mm. Trinidad. 



20. violaceus, new species 



With a hardly noticeable very short, narrow yellowish streak on inner orbits 



just above antennae, or with none; antennae yellow below on basal half or 



more; no violet reflections on thorax; dorsal surface of posterior tibiae not 



dull reddish; wings hyaline, veins and stigma dark 44 



44. With a hardly noticeable narrow, short streak on inner orbits just above 



antennae on interior orbits; ratio of length of third and fourth joints is 

 14:11, the comparable vertex width is 16; the lower interocular distance is 

 15; abdomen more bluish, shining; first two pairs tibiae bright yellow, 

 posterior pair much darker, not yellowish, but with a strong purple cast in 

 reflected light; coxae blue green, trochanters dark with a blue-green reflec- 

 tion; foretarsi dark reddish much darker than tibiae; middle and posterior 

 tibiae dark but with a reddish cast in reflected light; wings hyaline, no 

 trace of yellow, veins and stigma dark; length 8.5 mm, Barro Colorado 



Island 19. purpiireus, new species 



No yellowish streak on anterior orbits; face and clypeus with silvery, seri- 

 ceous pile; propodeum rugulose; thorax densely punctured 45 



45. Metallic green with blue reflections on pleura and propodeum; silvery across 



apex of propodeum; legs fulvoferruginous; coxae blue green; trochanters, 

 tarsi, and apex of posterior tibiae blackish, violaceous; wing h}'aline, dusky 

 at tip, iridescent and with a faintly yellowish gloss; abdomen smooth and 

 shining varied with a silvery sericeous pile; head densely punctured; 

 antennae pale brown, yellowish at base underneath; length 8.0 mm. Mexi- 

 co chloris (Cresson) 



Dull green with purplish reflections on pleura and propodeum; head dull 

 green with stronger purplish reflections; propodeum no more silvery 

 across apex than elsewhere; coxae mostly black, less bluish green re- 



