NEW SPIDER WASPS — DREISBACH 149 



as each other; coxae bluish green, legs faintly same color; antennae black; 



length 8.5 mm. Guatemala 31. medius, new species 



Head and thorax a very dull green with faint purple reflection and abdomen 

 bluish on basal half, the apical half with very strong violet reflection ob- 

 scuring the bluish, shining; legs all black; coxae bluish and rest of legs only 

 a faint blue; wings strongly fuscous, veins black; ratio of third and fourth 

 antennae joints is 12:10; upper and lower interocular distance about equal 

 (18); lateral ocelli 1.5 as far from eyes as each other; antennae black; 

 pygidium not so smooth and shining as usual; anterior margin of clypeus 

 broadly rounded; length 9.2 mm. Mexico . 32. hidalgoensis, new species 



53. Black, showing bluish reflections, especially on abdomen; thorax may be 



partly bluish; anterior margin of clypeus straight; wings fumose, rather 

 darker over basal vein, in certain lights plainly coppery iridescent; second 

 and third antennal joints equal to vertex width; propodeum faintly ridged 



on sides. Jamaica bruesi (Banks) 



Wings hyaline, abdomen and head not black 54 



54. Thorax a medium bright green, with no trace of purple iridescence; clypeus 



and face black; abdomen dark blue in all light; apex of forewing no darker 

 than rest of wing; third and fourth antennal joint equal in length (8); 

 upright hair on top of vertex and front black; upper interocular distance 

 slightly greater than lower; length 5.6 mm. Mexico. 



51. niinutus, new species 

 Thorax a dull bluish green with beautiful purple iridescence; clypeus and face 

 with bluish iridescence; abdomen appearing black in certain light, but with 

 deep-blue reflection; upright hair on vertex and front white; apex of fore- 

 wing darker than rest of wing; third antennal joint slightly longer than 

 fourth, ratio of their lengths is 11:9; upper interocular distance slightly less 

 than the lower; length 6.0 mm. Mexico . . . 48. kathryni, new species 



MALES 



1. At least basal abdominal segment wholly yellowish or yellowish with some 



black 2 



Abdomen with no segments whitish or yellowish except the apical tergite 

 may be white . 6 



2. Pronotum reddish and thorax with some reddish color; only the first one or 



two basal abdominal segments j'ellowish; face and clypeus j^ellowish; all 

 of legs yellowish except tarsal joints and possibly some black on posterior 



coxae; last two antennal joints flattened 3 



Pronotum black or with lower anterior corners and posterior border whitish; 

 first three abdominal segments reddish a third with some black on dorsum 

 or all segments reddish 4 



3. Clypeus, face, and broad anterior orbits to above antennae shining glossy 



yellowish; first and about basal half of second abdominal segments yellowish; 

 posterior coxae with some black; thorax almost black with some greenish 

 color; first three and basal half of fourth antennal joints reddish. Trinidad. 



Figs. 24, 25 34. albifrons, new species 



Clypeus, sides of face, and anterior orbits to antennae a dull yellowish; middle 

 of face blackish; the clypeus and face with much more and coarser pubes- 

 cence than above; the first abdominal segment and only base of second 

 yellowish; posterior coxae reddish; thorax black (some greenish) with 

 streaks of reddish on sides of thorax and propodeum; antennae with less 



