SMITH OK HYMENOPTEEA OP AETT ISLANDS. 143 



ginous as well as the mandibles; the head strongly and evenly 

 striated longitudinally. The prothorax with a circular striation above ; 

 behind, the thorax is compressed, the sides being obliquely striated, 

 the striae uniting and crossing the central ridge of the thorax. The 

 node of the petiole and basal segment of the abdomen with a curved 

 striation, the second segment longitudinally striated and depressed at 

 its base, which is smooth and shining ; the basal half of the third seg- 

 ment is longitudinally striated. 

 Hab, Aru. 



This species is at first sight very like the P. geometrica from Singa- 

 pore ; but the striation of the abdomen alone will serve to distinguish it. 



3. PoNERA PARALLELA. P. nigra, opaca ; antcnuis, maudibulis, pcdi- 

 bus abdominisque apice ferrugineis. 



Worker. Length 3^ lines. Opake black; the autennae thick and 

 scarcely as long as the thorax, their apex and the mandibles bright 

 ferruginous ; the legs somewhat obscure ferruginous, with the articu- 

 lations much brighter ; the head a little wider than the thorax and 

 subovate ; the thorax, node of the petiole, and the abdomen of nearly 

 equal width, the abdomen being slightly the widest ; the node of the 

 petiole nearly quadrate ; the apical margin of the first segment and 

 base of the second slightly depressed. 



Hab. Aru. 



4. PoNERA QUADRiDENTATA. P. atro-fusca ; antcnuis, facie antic^, 

 antennis, mandibulis, tibiis tarsisque ferrugineis ; alis subhyalinis. 



Female. Length 3| lines. Nigro-fuscous ; the antennae with a 

 carina between then: base, the face anteriorly, the mandibles, the 

 legs, and the abdomen at its apQX and beneath, ferruginous; the 

 femora and coxae above, fuscous ; the head subquadrate with the 

 angles rounded ; the eyes small and placed forwards on the sides of 

 the head towards the base of the mandibles, the latter with four 

 strong teeth on their inner margin. Thorax oblong-ovate with the 

 metathorax truncate; the wings fusco-hyaline, the stigma large and 

 black. Abdomen : the second segment slightly narrowed at its base, 

 the node of the petiole incrassate and compressed, its upper margin 

 rounded. The insect entirely covered with a short downy cinereous 

 pile, the abdomen having also a number of scattered erect glittering 

 hairs. 



Hab, Aru. 



Gren. ECTATOMMA, 



1. EcTATOMMA RUGOSA. JE. fusco-brunnea ; capitc, thoracc, nodoquc 

 rugosis ; abdomine delicatule aciculato. 



Worker. Length 4 lines. Obscure fusco-ferruginous, the antennae and 

 legs bright ferruginous; the head, thorax, and node of the petiole 

 coarsely rugose ; the eyes very prominent and glassy ; the mandibles 



LIKN. PEOO. — ZOOLOGY. 10 



