172 SMITH ON HTMENOPTEBA OF ARU ISLANDS. 



3. Mesostenus albopictus. M. niger, albo variiis; alls hyalinis. 



Female. Length 7 lines. Black ; the clypeus, mandibles, palpi, the 

 joints of the antennae from the sixth to the thirteenth, and a broad 

 stripe at the inner orbits of the eyes white. Thorax : an ovate spot 

 on each side of the prothorax above, a similar spot in the middle of 

 the mesothorax, the tegulse, scutellum and postscutellum, a T-shaped 

 spot reversed on the metathorax, a large quadrate one on its sides, 

 three irregular-shaped maculae beneath the wings, and the anterior 

 and intermediate legs white, the legs with a black line above ; the 

 posterior legs have a large spot on the coxae behind, the trochanters, 

 the tibiae, and tarsi white, the tibiae black at their apex, and the 

 femora palish at their base outside ; the wings hyaline and iridescent, 

 with the nervures black. The abdomen beneath, and the apical mar- 

 gins of the segments above, white. 



Male. Rather smaller than the female, but only differs otherwise in 

 the colour of the legs, the anterior and intermediate pairs being 

 entirely yellowish-white, excepting the intermediate tibiae and tarsi, 

 which are slightly fuscous above ; the posterior femora are ferru- 

 ginous, the tibiae and tarsi white, with the base and apex of the two 

 former black as well as the apical joint of the tarsi. 



Hab. Key Island. 



Gen. PiMPLA, Fahr. 



1. PiMPLA OCHRACEA. P. ochracca ; antcunis ferrugincis ; facic lutca ; 

 alis hyalinis, apice fuscis. 



Female. Length 5 lines. Entirely ochraceous, with the face and scape 

 in front yellow ; the body beneath is pale ochraceous ; the antennae 

 ferruginous, above dusky ; the eyes emarginate within ; the tarsi have 

 the tips of the claws black ; the wings flavo-hyaline, with the apex of 

 the anterior pair fuscous, the nervures black, becoming yellow at the 

 base of the wings. The head, thorax, legs, and base of the abdomen 

 smooth and shining ; the abdomen, except the base, finely punctured ; 

 a transverse impressed row of punctures a little before the apical 

 margin of each segment, and the space between impunctate. 



Hab. Aru. 



2. PiMPLA BRACONOiDEs. P. rufo-flava ; antennis tarsisque et abdo- 

 minis dimidio posteriori nigris ; alis fuscis, dimidio basali ilavis. 



Female. Length 6 lines. Ferruginous ; the posterior tarsi and the 

 fourth and following segments of the abdomen black; the head is 

 reddish yellow, the eyes brown ; the scape and two or three of the 

 basal joints of the flagellum ferruginous, the rest fuscous ; the basal 

 half of the wings flavo-hyaline, the apical half fuscous ; the stigma 

 yellow, with a subhyaline macula beneath, and two other similar 

 irregular-shaped spots. The abdomen with two longitudinal carinae 



