DESCRIPTIONS OF THREE NEW SPECIES OF SOCIAL VESPIDAE 



WITH NOTE ON POLYBIA ALBOPICTA SM. 



By P. CAMERON 



1520 Chartergus mexicanus sp. no v. 



Small, broad, the pubescence sparse, inconspicuous, microscopic; a 

 narrow band on the first abdominal segment above, a broad one (oceup- 

 yind about one-fourth of the segment) on the apex of the second, and 

 bands, slightly narrower than that on the second, on the other segments 

 all around, yellow. Wings hyaline, iridescent, the n«rvures and stigma 

 black. Female. Length to end of second abdominal segment 6-7 mm, 

 Acapulco, Mexico (Prof. C. F. Baker). 



First abdomiinal segment small, cup-shaped, a distinct neck at the 

 base, much narrower than and clearly separated from the base of the 

 second segment, voluch is as long as the width of the apex; barck 

 segments are strongly, distinctly and moderately closely punctured. 

 Head margined behind, the center less strongly than the sidesi; 

 pilose. Clypeus Spangled, broader than its greatest length, the apex 

 smooth, the rest finely, closely and for the most part longitudinally 

 striated. Mandibles shining, smooth, except for some weak punctures 

 near the apex. Postscutellum smooth and shining, bare, as is also the 

 ax)ex of the sicutellum, the two ' forming a continous oblique slope, 

 except at the top of the postscutellum in the centre, where the latter 

 is dilated. Median segment depressed, smooth and shining in the 

 center which bears a not very distinct longitunal keel; the sides are 

 broadly rounded, not angled or toothed. The third antennal article is 

 nearly as long as the following three united, distinctly narrowed at 

 the base. 



Belongs to Ducke's group of Nitidus, cf. Sobre as Vespides Sociaea do 

 Para'', Boletin de Museu Goeldi, IV p. 325. 



Chartergus aztecus sp. nov. 



Black; densely covered with pale pubescence; a narrow pale yellow 

 line on the apex of the first abdominal segment above, and broader 

 yellowish-rufous bauds on the following segment ; a short reddish line 

 opposite the antennae touching the eyes; a narrow line on the apex 

 of the clypeus and the greater part of the mandibles are piceous red. 



Wings fulvous yellow, paler towards the apex, the nervures and 

 stigma fulvous. FemaJe. Length to end of second abdominal seg- 

 mena 7 mm. 



A broad species compared with its length; the abdomen distinctly 

 wider than the thorax, its baeal segment very short, inconspicuous, 

 flat cup-shaped, much narrower than the second, which is large, as 

 long as wide, roundly narrowed at the base. Front and vertex pune- 



