ART. 5 GENERIC REVISION OF THE FOSSORIAL WASPS PARKER 33 



yellow on the clypeus reduced to mere traces at the extreme ventro- 

 lateral borders and the yellow on the labrum reduced to lateral lines. 

 The yellow on the prothorax is reduced to spots on the tubercles. 

 The fasciae on scutellum, metanotum, and propodeum are well de- 

 veloped, as are the maculations on the abdomen. There are also 

 small spots on the sides of the thorax and propodeum. The legs are 

 predominantly black, but on three of the four females the apical 

 segment of the tarsi is largely or wholly yellow, whereas on the 

 fourth female and on the male this yellow is reduced to a spot or is 

 wanting. 



specimena examined 



Argentina. 



Brazil: Chapada (March 10); Sao Paiiio (Hammar) ; Guaraja, S. Paulo 

 (December 2, 1919, Cornell U. Exped.). 



Fabricius reports the species from Cayenne. 



STICTIA INFRACTA, new species 



Type (female). — Black: labrum; mandibles, except tips; clypeus, 

 except a small pair of black spots; lower part of frons extended on 

 median line above antennae; scape below; anterior orbits; posterior 

 orbits broad below; narrow posterior border of pronotum; tubercles 

 and sides of prothorax almost entirely; narrow lateral lines on scu- 

 tum ; narrow fascia of scutellum ; fascia on metanotum ; narrow fascia 

 on propodeum extending downward in a V-shaped prolongation on 

 the posterior surface and inclosing a triangular black spot ; posterior- 

 lateral angles and sides of propodeum almost wholly ; metapleura and 

 mesopleura, except black lines at the sutures; mesosternum, except a 

 pair of black spots in front of middle coxae ; broad continuous fasciae 

 on tergites 1-5, slightly emarginate at anterior middle and produced 

 forward slightly on either side the emargination on all except the 

 first, and produced forward laterally on all ; pair of median spots on 

 anterior surface of tergite 1 ; interrupted fascia on tergite 6 produced 

 forAvard laterally as on preceding; sternites 1-3 entirely; i, except 

 anterior median spot; 5, except median and pair of lateral black 

 spots ; pair of small lateral spots at apex of sixth ; legs entirely, except 

 black lines above on all femora and tibiae ; yelloio. Flagellum black 

 above, tawny below. Wings hyaline. 



In form this species is relatively slender and resembles more closely 

 members of the genus Benibix than it does the robust forms of Stic- 

 tia. If it were not for the form of the anterior ocellus and the char- 

 acter of the mouth parts, it would readily pass for a Bemhix. The 

 color of the dorsal markings and the clypeus is a pale greenish or 

 creamy yellow, while that of the labrum, the ventral markings, and 

 22764—29 3 



