SMITH ON HTMENOPTERA OF AEU ISLANDS. 165 



3. Odynerus multipictus. O. niger, flavo raaculatus et punctatus; 

 pedibus flavis, alis hyalinis. 



Female. Length 4 lines. Black ; the head and thorax strongly punc- 

 tured, the abdomen finely and distantly so ; the clypeus, a spot 

 above it, the inner and outer orbits of the eyes, and the scape in front 

 yellow ; the clypeus deeply emarginate in front ; the mandibles fer- 

 ruginous, with a yellow spot at their base. Thorax : the prothorax 

 in front, the tegulse and two spots beneath the wings, the scutellum, 

 and sides of the metathorax yellow; the legs yellow, with ferru- 

 ginous stains ; the femora with a black or dark stain above ; wings 

 hyaline, with a fuscous stain along the anterior border of the superior 

 pair. Abdomen : a yellow fascia on the apical margins of the two 

 basal segments ; the three following segments with very narrow yellow 

 borders, and the apical segment entirely reddish-yellow. 



Hab. Aru. 



4. Odynerus modestus. O. niger ; abdominis segmentis duobus 

 basalibus flavo fasciatis j tibiis tarsisque ferrugineis ; alis hyalinis ; 

 abdominis segmento primo basi transversim biearinato. 

 Female. Length 4 line's. Black ; head and thorax coarsely punctured ; 

 the vertex swollen ; the scape of the antennae, a spot between them, 

 and the clypeus yellow ; the latter with a transverse black spot in 

 the middle, deeply notched in front, and having a carina on each side, 

 in a line with the angle or tooth of the emargination ; the flagellum 

 ferruginous towards the apex beneath ; wings hyaline, with a fuscous 

 cloud in the marginal cell ; the tibiae and tarsi ferruginous. Abdo- 

 men : the base truncate, with an oblique space above the truncation, 

 the margin of both defined by an elevated ridge or carina ; a narrow 

 fascia on the apical margin of the basal segment, and a broader one 

 on the second ; the latter continued beneath the abdomen. 

 Hab. Aru. 



This species is undoubtedly allied to 0. Sichellii of Saussure ; but, 

 beside dijBPering in the colour of its legs, and of the bands of the abdo- 

 men, it wants the strong tubercle at the base of the second segment of 

 the latter. 



Gren. Alastoe, St.-Farg. 



1. Alastor unifasciatus. a. niger; macula inter antennas, ab- 

 dominisque margine apicali et segmento secundo flavis ; ahs fuscis. 



Female. Length 6^ lines. Black ; the head and thorax strongly punc- 

 tured ; the face, sides of the clypeus, cheeks, and base of the man- 

 dibles with a fine silky silvery-white pubescence ; the clypeus convex, 

 its anterior margin emarginate ; from each angle of the emargination 

 a shining carina runs more than halfway up the clypeus; a minute 

 spot between the antennae, and two on the anterior margin of the 

 prothorax, yellow ; the wings fuscous, palest at their posterior mar- 



