NEW SPIDER WASPS — DREISBACH 143 



thorax, and propodeum shining pubescent; antennae black; wings dark 



brown; length about 7.0 mm. Costa Rica, Mexico . 17. incognitus (Smith) 



All coxae dark-colored 20 



20. All coxae dark-colored but with the ventral surface and apex yellowish, the 



rest with a bluish tinge; all legs reddish except last joint of tarsi of first 

 two pairs of legs and last four joints of posterior legs; antennae wholly 

 reddish; whole body with a coarse slightly yellowish pubescence; head, 

 thorax, and abdomen with a faint greenish tinge; wings yellowish, with 

 yellow veins and stigma; length 10.5 mm. Costa Rica. 



5. villosus, new species 



Coxae not as above, and without the somewhat yellowish coarse pubescence, 



wings not yellowish 21 



21. All coxae dark-colored with apex yellowish 22 



Coxae not with yellowish apex 23 



22. All basitarsi bright yellowish, coxae almost black but with a shght bluish 



tinge; legs colored as in villosus; antennae dark brown on top, lighter 

 colored beneath; body with normal prostrate white pubescence on head and 

 thorax; abdomen shinging, pruinose; head and thorax slightly greenish; 

 wings with slightly dark veins and stigma blackish; length 10.5 mm. 



Barro Colorado Island iolanthe (Banks) 



Posterior basitarsi dark-colored, the first two pairs very dark reddish; all legs 

 with a much darker cast than in helvolus (where the legs are bright yellow) ; 

 abdomen black with a trace of bluish, where the pruinose vestitute is rubbed 

 off; head almost black, just barely a trace of greenish; thorax very dull 

 greenish, with violet reflections; face, clyi^eus, and parts of thorax (sides) 

 with dull, scant, whitish pubescence; the apex of propodeum with long, 

 dense, shaggy, prostrate, white pubescence across apical third; coxae with 

 greenish reflection; veins of wings black; first recurrent vein meets second 

 cubital cell beyond middle; length about 10.0 mm. Costa Rica. 



6. nebulosus, new species 



23. Antennae black, or black above and yellowish below; or first joint of antennae 



is yellow below and yellow above with a black stripe and all tibiae and basal 



joints of all tarsi are yellow 24 



Antennae with first joint bright yellow above and below; coxae not black 

 on dorsal surface, blue or blue green; legs bright yellow; thorax with 

 yellowish (slightly golden), prostrate pubescence; thorax greenish, hidden 

 in places by the dense somewhat coarse pubescence; first antennal joint 

 bright yellow above and below, the next two dark reddish above, yellow 

 below, the rest dark; size smaller, length 8.0 mm. Barro Colorado Island. 



8. minus, new species 



24. Face, clypeus, and inner orbits black; front and vertex with a faint dull 



greenish tinge; thorax hardly with more color than head or may be plainly 

 greenish; clypeus, face, and inner orbits with appressed silvery pubescence; 

 anterior trochanters yellowish or mostly black, last two pairs mostly black; 

 abdomen black, shining; interior orbits with a faint narrow yellowish streak 

 just above antennae or rarely with none; all femora bright yellow as well as 

 foretibiae; midtibiae darker on apex and on inside, posterior tibiae all dark; 

 forebasitarsi yellowish, rest of foretarsi and the other two pairs dark; 

 thorax with more or less silvery pubescence all over; ratio of lengths of 

 third and fourth antennal joints is 18:14; length 12.0 mm. Barro Colorado 



Island, Guatemala 24. lineatus, new species 



Head not black, abdomen black or reflecting colors; no yellowish on anterior 

 orbits; tibiae all yellow or some dark 25 



