02 P. CAMERON. HYMENOPTERA I. 



furrow on its basai half. Post-scutellum and metanotum in one slope; the latter smooth, 

 broadly furrowed down the middle. Tarsi minutely spinose. The first abdominal segment is 

 narrowed at the base, becoming gradually widened towards the apex; it is about two-thirds 

 of the length of the second, which is bell-shaped. 



This species shows an approach to Polybia. The scutellum and metanotum form more 

 distinctly one slope than usual, more as in Polistes than in typical Icaria. The size of the 

 markings varies. 



2. Icaria maculiventris Guér. 



Rhopalidia maculiventris Guérin, Voy. de la Coquille. Zool. II, Ins. 267, pi. 9, fig. 8; Icaria 

 maculiventris Saussure, Etudes sur 1. Fam. d. Vespides II 23. 



Sentani, April. Tami, May. 



3. Icaria australis Sauss. 



/. austraas Saussure, /. c, 21; pi. XXXIV, f. 5. 

 Moaif, June. 

 A characteristic of this species is the spiniform tubercle on the metanotum. 



4. Icaria spilostoma sp. nov. 



Manokwari, May. 



Black, densely covered with a grey silky pile, a line on the inner orbits opposite the 

 antennae, a broad mark on the sides of the clypeus on the lower two-thirds, the marks broad 

 above, gradually narrowed to a point below, the black central part of the clypeus being thus 

 broad above, gradually narrowed to a sharp point below and a narrow band on the apex 

 of the 2 nd abdominal segment, whitish yellow. The base of the antennae rufous above. Wings 

 hyaline, the nervures and stigma black; the anterior half of the radial cellule is smoky. Q. 



Length 10 mm. 



Clypeus slightly longer than its width in the middle, ending in a sharp point below; 

 shining, thickly covered with white pubescence, strongly, but not closely punctured ; the front 

 and vertex are more closely and slightly more strongly punctured. Eyes almost reaching 

 to the base of the mandibles, the malar space' being about half the length of the antennal 

 pedicle. Pro- and mesothorax strongly and closely punctured ; the apical half of the post- 

 scutellum smooth and shining. Metanotum deeply and widely depressed ; its sides largely 

 projecting in the centre, rounded, with the upper slope straighter, more oblique and longer 

 than the lower; in the centre is a shallow smooth furrow. Abdominal pétiole narrow at the 

 base, becoming gradually wider towards the apex, which is rounded laterally ; its length is 

 not much more than the width at the apex ; its basai half is smooth, the apical rather strongly, 

 but not very closely, punctured; the 2 ai is more closely and uniformly punctured; the 2 nd 

 is longer than usual, than in e. g. I. irritata or /. maculiventris compared with the width at 

 the apex; it is not so much, or so distinctly narrowed at the base; it is much more distinctly 

 longer than the width at the apex. 



The cf has the face and clypeus densely covered with silvery pubescence; the clypeus 

 lias the sides and apex broadly yellow; its apex is broadly rounded. There is a large yellow 



