l88 P. CAMERON. HYMENOPTERA. 



Icaria Sauss. 



This genus falls into 2 groups, by the form of the abdominal pétiole. The species are 

 darker coloured — having less red on the thorax and abdomen, than those from Hindu-Malaya. 



A. Abdominal pétiole not longer than the scutellums and metathorax, the apex 

 thickened, pyriform. 



1. Icaria insularis sp. n. 



Bivak Island, November. 



Black, the flagellum of antennae from the 31'd joint rufous beneath; a narrow line on 

 the sides of the i st abdominal segment, wider ones, ail round, on the apices of the others 

 and a small spot near the base of the 2nd segment, rufo-testaceous ; wings orange hyaline, 

 fuscous violaceous at the base. Densely covered with short white pubescence. i st abdominal 

 segment tvvice longer than it is wide at the apex, becoming gradually wider from the base 

 to the apex ; the 2 nd a little longer than it is wide at the apex, towards which it becomes 

 gradually widened. Q.' 



Total length 1 1 mm. 



The spécimen is not in fresh condition, having been moistened. There are apparently 

 2 spots near the apex of the clypeus. 



2. Icaria sericea sp. n. 



Bivak Island, January. 



Black, densely covered with white silky pubescence, especially the head and thorax ; 

 the apical fourth of the 2 n( l segment and the others except at the base reddish orange, the 

 black basai lines on the ^ and following segments dilated laterally, a line, twice longer 

 than wide, on the base of the mandibles on the inner half, a triangular spot on apex of the 

 clypeus on either side of the apical point, a narrow line on the orbits opposite the antennae 

 and 2 transverse marks over and above the antennae, yellow. Wings fuscous violaceous, the 

 basai half darker coloured than the apical. First abdominal segment pyriform, the base 

 distinctly narrowed, the dilated apex longer than it is wide at the base. Q. 



Length 14 mm. 



Finely, closely punctured on the head and thorax, the apical half of the mesonotum 

 and the scutellums more strongly punctured than the rest, the steeply sloped apical half of 

 the post-scutellum impunctate. The sides of the metanotum project in the middle into a 

 tubercle. 



The 2 spots at the antennae may be united, there may be a minute spot near the 

 base of the 2 nd abdominal segment. The shape of the band on the 2°^ abdominal segment 

 varies ; it may be more or less narrowed in the middle. 



3. Icaria sexmacidata sp. n. 



Bivak Island, February; Lorentz River, September. 

 Black, densely covered with a white silky pile, the abdomen rufo-testaceous, the 



