240 HYMENOPTERA. 



B. Body for the greater part red. (Species 25-34.) 



""-—25. Polycyrtus univittatus. 



Polycyrtus univittatus, Cresson, Proc. Acad. Phil. 1873,, p. 148 (<? ? )\ 

 Eab. Mexico, Orizaba, Cordova 1 (Sumiehrast). 



26. Polycyrtus pallidus. 



Polycyrtus pallidus, Cresson, Proc. Acad. Phil. 1873, p. 148 ( <J)\ 

 Hab. Mexico, Cordova 1 (Sumiehrast). 



27. Polycyrtus pallidibalteatus. 



Pallide rufus ; antennis, vertice, prothorace, tegxilis, mesothorace, metathoraeis basi abdominisque dorso (apicibus 

 segmentorum exceptis), nigris ; annulo flagello antennarum, facie, ore, orbitis, linea pronoti, apiee scutelli 

 postscutelloque, albis ; alis hyalinis, nervis nigris. 5 . 



Long. 21 millim. 



Hab. Mexico, Orizaba (Bilimek). 



Antennae, if anything, longer than the body, covered with a microscopic pile. Head 

 impunctate, shining ; pale white, except the vertex in the centre and behind ; frontal 

 spine stout, about one half the length of the scape. Lobes of the mesonotum well 

 developed (especially the middle one), the lateral one with a very distinct margin along 

 the edge. The two transverse keels on the metanotum are distinct, the upper one but 

 slightly bent upwards in the middle ; the lower one is bent sharply upwards, thus -*- ; 

 spines short, blunt (double as long as wide). The metathorax bears some scattered 

 pale longish hairs; the black at the base of the metanotum is divided in the middle 

 and it runs there and at the sides into the red. Petiole black, reddish at the base, 

 sides, and beneath ; the apex of the postpetiole broadly white. The apices of the 

 segments are broadly yellowish-white ; the tarsi whitish or yellowish ; the anterior legs 

 yellowish in front, and the tips of the tarsi are black. 



I am not quite sure but this species may be identical with the Brazilian P. histrio, 

 Spinola (Ann. Soc. Ent. Fr. ix. p. 155, t. 7. fig. 3 ; Brulle, Hymen, iv. p. 214 ; 

 Taschenberg, Zeits. f. d. gesammt. Naturwiss. xlviii. p. 78), with which it agrees in 

 coloration ; but P. histrio, so far as I can make out, has only one keel on the meta- 

 notum, the lower one so conspicuous in the present form being absent. Brulle 

 furthermore describes the spines as " longues et un peu arquees " in the female, terms 

 which scarcely fit P. pallidibalteatus. From the next species it may easily be known 

 by the much darker dorsum of the abdomen (including the petiole), and by the black 

 base of the metanotum ; P. erythrostemus, moreover, having the spines much longer 

 and sharper with no keel between them, the face being black. 



