ART. 5 GENERIC REVISION OF THE FOSSORIAL WASPS PARKER 159 



referred to this species a male from southern Chile, collected by 

 M. J. Rivera, and females collected at Rio Janeiro, Bogata, Cayenne, 

 and La Paz, Bolivia. 



MICROBEMBEX TRICOSA, new species 



Figures 53-55 



This species is based upon specimens from Jamaica. The male is 

 distinguished by the evident rounded lateral angles of the seventh 

 tergite, which give to the apex of the tergite a distinct triangular 

 outline (fig. 54). The spine of the eighth sternite is flattened, 

 straight, and truncate at the apex. On the female the fasciae on the 

 tergites are of two colors: the dorsal median portion is yellow or 

 greenish yellow, while the lateral parts are creamy yellow or pale. 

 The pubescence on the frons of the female is silvery on the lower part 

 and on the areas bordering the eyes, but that on the upper central 

 part shows a decided golden tinge. The pubescence on the frons of 

 the male is distinctly golden. 



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

 scape below ; vestiges of posterior orbits ; central spot on dorsum of 

 prothorax united with a line on posterior border of pronotum that is 

 continuous on tubercles and sides of prothorax; lateral lines and pair 

 of large discal spots on scutum; large lateral spots showing a ten- 

 dency to elongate along the anterior border of scutellum ; metanotum ; 

 broad, curved fascia on propodeum narrowed at midline; large tri- 

 angular spot on mesopleura; broad fasciae occupying almost the en- 

 tire surface of tergites 1-6; fascia on second tergite inclosing pair 

 of small, widely separated discal spots; fasciae on tergites 3-6 with 

 widely separated, more or less evident biemarginations and median 

 notch on anterior border; pair of lateral apical spots on tergite 7; 

 broad fascia on sternite 2 ; broad fascia on sternite 3 deeply biemar- 

 ginate on anterior border; lateral spots on sternites 4-6 connected 

 by posterior apical lines ; coxae and trochanters more or less ; femora, 

 except more or less of the basal half of all ; tibiae, except spot below 

 on all ; and tarsi ; yellow. 



The maculations on the allotype (female) do not differ essentially 

 from those on the type, excejDt on the abdomen. The fasciae on the 

 tergites of the allotype are bicolored, as has been noted above, and are 

 much narrower than those on the type. While they are somewhat sin- 

 uate on the anterior border, they are not emarginate and all are with- 

 out discal spots. The fifth is interrupted. The sixth tergite bears* 

 apical lateral spots. There are lateral spots on sternites 2-5, of which 

 those on 2-4 are connected by narrow, apical lines. The black on the 

 legs is somewhat more extensive than on the type. The sixth tergite 

 ends in two short spines (fig. 53). 



