154 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



posterior orbits; prothorax, except black area above and dusky spot 

 in front of tubercles; conspicuous lateral lines and broken U-shaped 

 discal mark on scutum; fascia on scutellum, narrowed toward the 

 midline and rather widely interrupted ; fascia on metanotum ; curved 

 fascia on propodeum, interrupted at midline on posterior surface; 

 lateral angles and almost the entire sides of propodeum ; metapleura 

 and mesopleura entirely, except narrow black lines along the sutures ; 

 fasciae on tergites 1-5, all interrupted at mid-dorsal line, except the 

 second ; fascia on second tergite biemarginate on anterior border, the 

 emarginations almost enclosed; fasciae on tergites 3-5 also more or 

 less conspicuousl}' biemarginate on anterior dorsal border; pair of 

 basal lateral spots on sixth tergite ; sternites 1-5, except small median 

 and pair of small, anterior lateral spots on second, and pair of ante- 

 rior emarginations on fifth ; legs, except more or less black at articula- 

 tions of coxae and trochanters, black on femora above, and black on 

 basal part of tibiae above ; yeUoto. 



The flagellum is black with a narrow, yellowish line below, 'becom- 

 ing testaceous toward the apex. The longitudinal lines of the 

 broken U-shaped discal mark on the scutum are tinged with reddish. 

 The wings are hyaline. The pubescence is relatively well developed, 

 white, and longer and more conspicuous on*the head than elsewhere. 

 The frons is wide, forming almost half of the width of the front 

 aspect of the head. The inner eye-margins are parallel. The an- 

 terior metatarsus bears six spines. On the sixth tergite there are 

 evident, though weakly developed, lateral ridges and the punctures 

 on the apical half of the tergite are coarse. 



The paratype differs from the type only in having an anterior, 

 median, black area on sternites 3 and 4 and in having the lateral 

 ridges on the sixth tergite almost obsolete. 



Length 13 mm. Described from two females (type and paratype) 

 bearing the label, " Pirapora, Minas Gereas, Brazil, November 11-13, 

 1919, Cornell U. Exp." 



Type. — In the collection of Cornell University. 



BEMBIX INCOGNITA, new species 



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

 lower part of frons; scape, except spot above; broad anterior orbits 

 joined by a transverse band below the anterior ocellus, and above 

 this point deflected away from the eyes and continued to the vertex; 

 broad posterior orbits continued at the vertex beyond the border 

 of the eyes but not meeting; prothorax; broad lateral lines and 

 prominent U-shaped discal mark on scutum; broad fascia on 

 posterior border of scutellum; metanotum; broad fascia on pro- 

 podeum; posterior surface, lateral angles, and sides of propodeum 



