1897.] NATURAL SCIENCES OF PHILADELPHIA. 379 



tral area ; petiole of abdomen about as long as hind femur, flat 

 above, not sulcate ; apical margins of segments testaceous ; wings 

 dark subhyaline, iridescent ; stigma testaceous, nervures darker ; 

 second and third submarginal cells each receiving a recurrent nerv- 

 ure, second submarginal cell narrowed about one-third above ; basal 

 vein and cubital of hind wing interstitial. Length 10 mm. 



Chapada (April). One specimen. Allied to the North Ameri- 

 can P. fuscipes. 



Stigmus neotropicus Kohl. 



One specimen. Corumba (May). 



Stigmus hexagonalis n. sp. 



9 . — Black ; mandibles, except apex, yellowish ; teguke, tuber- 

 cles, antenna? and legs, including coxa?, reddish-brown ; cheeks 

 angularly produced beneath; head shining, not striated; ocelli 

 forming a low triangle, placed in pits ; the space between hind pair 

 much less than that between them and eyes ; clypeus acutely biden- 

 tate medially ; prothorax above marked by a transverse series of 

 strong fovea?, the antero-lateral angles of pronotum acutely produced, 

 as are also the sides of prothorax ; dorsulum punctured, with three 

 deep parallel furrows, the middle one of which runs to apex, the 

 others hardly half as long; suture between dorsulum and scutellum 

 foveolate ; middle segment coarsely reticulate, at base above with a 

 hexagonal enclosure, which bears a longitudinal medial fold ; petiole 

 robust, shorter than hind tibia?, with two deep sulci above, between 

 which runs a rather sharp ridge. Length 5 mm. 



Chapada (December, January) ; Corumbii (May). Three speci- 

 mens. Seems to be allied to S. temporalis Kohl, from Guatemala, 

 of which only the $ is known. 



Trachypus Romandii Sauss. 



Two specimens. Chapada (November, December). 

 Nysson tomentosus Hdl. 



Chapada (December). One specimen. 

 Nysson pilosus Sm. 



Uacarizal (February). One specimen. 

 Bothynostethus sp. 



A $ specimen from Santarem I am unable to refer to any of the 

 three described species of Bothynostethus. It agrees with Saiissurei 

 in the color of wings, but the mandibles are deeply excised and the 



