1898.] NATURAL SCIENCES OF PHILADELPHIA. 457 



of second and third submarginal cells at the top nearly equal. 

 Length 15 mm. 



Chapada, September, October. Four specimens. Is the exact 

 counterpart of P. sericea superficially, but differs by the squarer head, 

 margined pronotum, more slender petiole, shorter dorsulum, etc. 



Tatua morio Fabr. 



Chapada, January, November, December ; Santarem. About 40 

 specimens. 

 Chartergus apicalis Fabr. 



Over 60 specimens. Sebastise, October ; Chapada, October to 

 December ; Corumba and Mararu, April. 



Chartergus Smithii Sauss. 



One example. Corumba, April. 

 Chartergus ater Sauss. 



Two specimens. Chapada, January; Santarem, April. 



Chartergus chartarius Oliv. 



Chapada, March and October ; Santarem. Nearly 50 specimens. 



Chartergus globiventris Sauss. 



Sebastian, October. Two specimens ( 9 <? ). The male closely 

 resembles the female, but has the clypeus entirely, a spot on scape 

 beneath, spot on all femora beneath near apex, and all the coxae 

 beneath, pale yellow ; the clypeus is considerably smaller. 



Chartergus fasciatus n. sp. 



9 or $ . — Black ; head below insertion of antenna?, cheeks, scape, 

 pronotum except a blotch on each side, scutellum anteriorly, mid- 

 dle segment entirely, mesopleurae except medially, legs including 

 coxae, a fascia on segments 1-3 at apex, segments 4-6 and ventrals 

 entirely, yellow ; flagellum black above, reddish-yellow beneath. 



Differs from C. Smithii other than in coloration, as follows : dor- 

 sulum shorter, nearly as broad as long; scutellum and postscutellum 

 smaller, the latter not tuberculate medially ; the wings are colored 

 as in Smithii, but the superiors have a pale band crossing them and 

 including the space between the apex of the costal, base of second 

 discoidal, and base of third submarginal cells, the veins included in 

 this region, and the stigma are whitish-yellow, elsewhere dark ; neu- 

 ration nearly as in Smithii. Length 7i mm. 



Mararu, April. One specimen. 



30 



