1898.] NATURAL SCIENCES OF PHILADELPHIA. 459 



by the slender mandibles, flatter head and differently shaped first 

 abdominal segment. 



Charterginus fulvus n. sp. 



9 or $ . — Entirely fulvous ; a broad stripe across vertex, flagel- 

 lum above, and sometimes the suture between dorsulum and scutel- 

 lum and a spot on second dorsal segment medially, black or black- 

 ish ; clypeus paler yellow. 



Clypeus much longer than broad, with large, shallow, scattered 

 punctures, its fore margin broadly truncate ; vertex with strong, 

 separated punctures ; ocelli forming an equilateral triangle, the 

 space between hind pair about one-third less than that between them 

 and eyes, the latter almost reaching base of manibles ; flagellum 

 clavate, first joint longer than second, but distinctly shorter than 

 the combined length of second and third ; occiput sharply margined 

 posteriorly ; pronotum medially with a distinct surface, transversely 

 margined on each side ; thorax strongly punctured ; dorsulum a 

 little longer than broad ; postscutellum with a distinct tubercle 

 medially ; middle segment strongly swollen on each side posteriorly, 

 not compressed ; abdomen strongly punctured, first segment cam- 

 panulate, with a basal petiole nearly as long as first hind tarsal 

 joint, transversely impressed before apical margin ; wings subhya- 

 line, black along costal margin, as are also the nervuresand stigma ; 

 second submarginal cell triangular, narrowed more than two-thirds 

 above; third submarginal longer than high, subquadrate, narrowed 

 about one quarter above. Length 7-8 mm. 



Mararu, April ; Santarem. Eight specimens. Judging from de- 

 scription, C. falvus must greatly resemble Chartergus coloboptenis, 

 but the dorsulum is not black as in that species, which is apparently 

 a typical Chartergus, with short first abdominal segment. 



Charterginus fuscatus n. sp. 



9 or $ . — Black, with brownish pile ; line on inner orbits below 

 emargination, continued along the sides of clypeus to apex, and 

 narrower line on posterior orbits, pale yellow ; first dorsal segment 

 at apex narrowly and obscurely yellowish. 



Head very flat, the cheeks scarcely developed ; clypeus longer 

 than broad, pyriform, acuminate at apex, finely punctured ; front 

 with shallow punctures; ocelli almost forming a curved line, the 

 hind pair separated by a much greater distance than they are from 

 the anterior one, and almost equal to that between them and eyes ; 



