NEW SPIDER WASPS — DREISBACH 145 



slightly brownish in reflected light, veins brown; length about 8.0 mm. 

 Costa Rica 11. sapphirus, new species 



31. Posterior tibiae dark reddish appearing black compared to the bright yellow 



femora and first two pairs tibiae; femora all completely rufous; color of 

 legs bright yellow; abdomen black, shining, pruinose, with very faint 

 bluish reflection; head and thorax dull greenish; clypeus and face with 

 rather strong appressed silvery pubescence; head and thorax with no long 

 hair, a smooth appearance; wings hyaline, shining and brown; trochanters 

 yellowish at tip and slightly on ventral surface; length a little over 7.0 



mm. Panama 12 exilis, new species 



Posterior tibiae black, the femora and first two pairs tibiae reddish; abdomen 

 black, not shining, not pruinose, without bluish reflection; face and clypeus 

 much more heavily silvery sericeous; wings hyahne, veins yellow; tro- 

 chanters all black; head and thorax with long whitish hair, a rough ap- 

 pearance; length 8.2 mm. Guatemala .... 55. hispidus, new species 



32. None of tibiae rufous, femora all rufous but knees of last two pairs dark; 



clypeus black, head with shades of blue and purple, thorax with similar 

 colors; abdomen black in certain light, but with brilliant shining blue and 

 purple; antennae brownish beneath, black above; wings hj'aline; clypeus 

 2.0 as broad as long; upper interocular distance (17) slightly less than 

 lower; head as long as broad; ratio of length of third and fourth antennal 

 joints is 16:12; length 10.2 mm. Barro Colorado Island. 



26. venetiis, new species 

 At least foretibiae rufous 33 



33. Only the foretibiae rufous 34 



The first two pairs of tibiae rufous 39 



34. Antennae black; head and thorax dull green or blue 35 



Antennae yellowish below, black dorsally, if hardly yellow below insect less 



than 7.0 mm. in length; antennae with the joints cylindrical 36 



35. Antennae black; head and thorax dull green with strong blue and violet 



reflections; abdomen strongly bluish and violet; a dull rather coarse sericeous 

 pubescence on clypeus, face, and thorax; base of all femora blackish at base 

 and rear pair at apex; tarsi all black; a large coarse species; femora enlarged, 

 the forefemora more than a fourth as wide as long, ratio of lengths of 

 forefemora and tibiae is 38: 30; ratio of lengths of third and fourth antennal 

 joints is 19:13: lateral ocelli 1.5 as far from eyes as each other; wings 

 with a violet iridescence ; joints of antennae with the apex larger than base 

 of next joint, giving an appearance of knots; length 12.5 mm. Panama. 



14. grossus, new species 

 Head and thorax dull green without blue and violet reflections; abdomen 

 not quite with as brilliant purple and violet reflection; all femora yellowish 

 no black at base or tip; foretibiae reddish yellow rest black; forebasitarsi 

 reddish rest of tarsi all black; forefemora one fifth as wide as long; ratio 

 of length of forefemora to tibiae is 39: 34; ratio of lengths of third and fourth 

 antennal joints is 22:17; wings hyaline, slightly yellowish, shining in 

 reflected light not violaceous; joints of antennae cylindrical not larger at 

 apex of joints than the base of next joint; length 12.0 mm. Costa 

 Rica 28. niagnus, new species 



36. At least clypeus, face and inner orbits to above antennae black, whole head 



may be black 37 



Clypeus and face not black 38 



37. Clypeus, face, and inner orbits to above antennae, black; front and vertex 



blue green ; pronotum, mesouotum, and sides of thorax blue green, the sides 



