P. CAMERON. HYMENOPTERA I. ' z 'j 



Vespidae. 

 Vespa L. 



I. Vespa cincta F. race affinis F. 



Manokwari, May, June. 

 Two of the vvorkers are almost typical cincta. The Malay form is the race affinis. 



Polistratus gen. nov. 



Sides of scutellum roundly projecting at the apex, clearly separated ; the sides ofpost- 

 scutellum raised, margined, the sides at the apex projecting, distinctly raised above and 

 separated from, the metanotum. Metanotum short, with a steep, oblique slope; its sides broadly 

 margined. Malar space very small, almost obsolète. First abdominal segment triangular, very 

 narrow at the base, becoming gradually wider towards the apex, which is rounded, not trans- 

 verse and roundly raised above the base of the second, its width being equal to the total 

 length of the segment. The second segment large, longer than wide. Second cubital cellule 

 along the cubitus slightly, but distinctly, shorter than the third; much narrowed along the 

 radius; the 2 nd and 3 nd transverse cubital nervures straight, oblique, not roundly curved. 



This genus is founded on a small, fulvous and yellow species, which appears to be 

 sufficiently distinct from Polistes and Polistella (ASHMEAD, Proc. U. S. Nat. Mus. 1904, XXVIII, 

 1 33) the gênera most nearly allied to it. Both may be known by the flat sides of the scu- 

 tellum and post-scutellum and by the latter not being raised and projecting at the apex and 

 by the abdominal pétiole being longer than it is wide at the apex. Polistes, too, has a distinct 

 malar space, the eyes being distinctly separated from the base of the mandibles; the clypeus 

 is longer and the 2<i d and 3 ld transverse cubital nervures are roundly curved. Polistella has 

 a long abdominal pétiole as in Polistes and it may otherwise be known by the 2id cubital 

 cellule being very short, along the radius and cubitus. Polistratus has a différent faciès from 

 any of the other Oriental wasp gênera. 



1. Polistratus cariniscutis sp. nov. 

 Manokwari, May. 



Head and thorax bright yellow, the vertex, upper half of front, occiput and mesonotum 

 dark rufous; the latter with 2 yellow lines on the apical two-thirds, which are thick and almost 

 united at the apex, becoming gradually narrowed towards the base; the sternum isofadarker 

 rufous colour. Abdomen rufous, coloured like the mesonotum, except the sides and apex of 

 the ist and the apex of the 2 nd segment which are yellow. Legs rufo-fulvous, the coxae and 

 the 4 anterior femora in front yellow. Wings almost hyaline, the stigma fuscous, the nervures 

 darker coloured. The metanotum is irregularly rugose, almost reticulated. 



Length 7 mm. 



