NEW SPIDER WASPS — DREISBACH 141 



5. Head, thorax, and abdomen covered with dense golden pile; that on abdomen 



more sericeous and not so dense; mandibles, clypeus (except a streak in 

 middle), inner orbits, and narrow posterior border of pronotum, golden; 

 antennae yellowish but dorsal surface browner; coxae (except at base, apex 

 and part of dorsal surface), all femora (except a posterior stripe), all tibiae, 

 and tarsi, except apical joint of first two pairs and all of posterior pair, 

 light yellow; wings fulvous with veins and stigma yellow; posterior border 

 of first five tergites reddish, and almost all of sixth; thorax almost black; 

 length a little less than 9.0 mm. Costa Rica, Mexico. 



auripilus (Cresson) 



Only head and thorax with dense golden pubescence; abdomen if slightly 



golden, pronotum golden 6 



6. Pronotum and rest of thorax greenish, pronotum not marked with reddish or 



yellow; abdomen silvery or without pubescence 7 



Pronotum mostly black, or completely bright golden thorax either black or 

 slightly greenish 8 



7. Coxae green on dorsal surface, reddish on ventral surface; all rest of legs 



(except four apical tarsal joints) reddish; head and thorax with appressed 

 golden pubescence, as well as upright light-colored hair, but hair on front 

 and vertex dark; thorax a shining green; mandibles, the apex of the rounded 

 clypeus, the dorsal surface of first three antennal joints, and the underside 

 of the first four antennal joints (rest blackish) reddish yellow; wings 

 dusky, the veins and stigma yellow; coxae mostly rufous beneath and 

 greenish dorsally; propodeum slightly ridged on apical half (extending to 

 the sides); abdomen shining blackish; basal veins in forewings, and sub- 

 discoidal and cubital veins in rear wings much disjointed; length about 



8.5 mm. Panama 3. splendens, new species 



Coxae, trochanters, and apical joints of tarsi black; rest of legs reddish; 

 posterior margin of pronotum arcuate; wings almost hyaline, tinged with 

 yellowish or fuscous; antennae with at least four or five basal joints yellow- 

 ish; length, 8-12 mm 9 



8. Pronotum completely golden; thorax slightly greenish on dorsum more 



evident on sides of thorax; posterior margin of pronotum angulate; legs 

 completely reddish (including coxae and trochanters) except apices of 

 tarsi; the pubescence of clypeus and cheeks is much denser, brighter and 

 more clearly separated from rest of head; mandibles are reddish fulvous; 

 wings more yellow; first recurrent vein received by the second cubital cell 



in middle; length 12 mm. Panama curvinervis (Cameron) 



Pronotum black with posterior edge and lower sides yellowish; posterior 

 margin transverse; no greenish on thorax; first tergite with a reddish line 

 across posterior margin; tergites two, three, and four with the posterior 

 edge reddish, color band straight on sides and forming a triangle in center 

 with apex pointing forward; the last two tergites and the last three ventral 

 segments completely reddish; coxae and trochanters yellowish with some 

 black; mandibles all yellow except extreme tips are black; length about 

 14.5 mm. Mexico, Brazil princeps (Banks) 



9. Antennae testaceous dusky at tip; base of femora black; wings hyaline, 



somewhat suilused with fuscous, stigma black; head wider than thorax; 

 third joint antennae about one quarter longer than the fourth; abdomen 

 shining; pygidium shining impunctate; coxae bearing a dense golden pubes- 

 cence; longer spur of hind tibiae not reaching middle of metatarsal joint; 

 the second and third cubital cells about equal at top; female. Mexico, 

 Guatemala cressoni (Cameron) 



