Cameron. — On Hymenoptera. 107 



yellow. Wings clear, hyaline, the nervures black, the stigma 

 fuscous. Abdomen rufous, the basal two-thirds of the petiole 

 and the other segments at the sides broadly black. The 

 anterior coxae are black above, yellow below. The middle 

 coxaB are yellow, except for a rufous mark, narrowed towards 

 the apex, on the basal two-thirds ; the middle trochanters are 

 black, yellow in the middle below ; the hinder are entirely 

 black ; palpi dark-rufous. 



Comes nearest to L. flato-picta, Smith, which has the ovi- 

 positor longer than the body, the metanotum without a large 

 black mark, all the coxa? yellow above, the scutellum entirely 

 yellow, &c. 



Dusona, gen. nov. 



Areolet present, minute ; the transverse cubital nervures 

 united at the top. Metathoracic spiracles elongate, about 

 three times longer than broad. Spiracles on petiole placed 

 at the base of the apical third, at the base of the post-petiole. 

 Claws simple. Clypeus not separated from the face by a 

 suture. Mandibles at the apex, with two teeth of equal size. 

 Transverse basal nervure interstitial. 



The eyes are distinctly sinuate above the middle on the 

 inner side, and do not quite reach to the base of the man- 

 dibles. The mandibles are large, and have on the lower edge 

 a distinct projecting keel on the outer side. The legs are of 

 normal size; the base of the anterior tarsi incised ;. the 

 tarsi spinose. Scutellum roundly convex, not keeled laterally 

 at the base. The depression at the base of the post- . 

 scutellum is distinctly keeled laterally. There are no keels 

 on the median segment, which is obliquely narrowed at 

 the base. Legs normal, the claws simple. Eadial cellule 

 wide ; the basal and apical obscissae of the radius distinctly 

 oblique and curved. Areolet small ; the recurrent nervure 

 is received in the middle. Petiole long, the post-petiole not 

 much dilated ; the apical segments widened ; the oviposi- 

 tor largely projects. There is a short longitudinal furrow on 

 the mesopleurae; above it, at its apex, is a wider oblique one. 



The oval metathoracic spiracles ally this genus to Cavipo- 

 plfx and Anomalon. The former may be readily known from 

 it by the pectinated claws, the latter by the want of an 

 areolet in the wings. Limneria, the only New Zealand genus 

 with which it could be confounded, has round, not oval or 

 elongated, metathoracic spiracles. The abdomen is twice 

 longer than the head and thorax united. 



Dusona stramineipes, sp. nov. 



Nigra ; mandibularum basi, palpis, femoribus, tibiis, tar- 

 sisque anterioribus, basique tibiarum posticarum late, flavis ;. 

 alis hyalinis, nervis stigmateque nigris. $ . 



