16 MR. F. SMITH ON HYMENOPTEEOUS IXSECTS 



Mr. Wallace, in a note, says, " ?s est on a tree, consisting of two small 

 cells of soft papery matter, about one inch in diameter ; each with one 

 opening." 



22. PoLYRHACHis XiPHiAS. P. niger, laevis nitidusque, metatho- 

 race petiolique squamula. bispinosis. 



Female. Length 4^ lines. Black ; the head subquadrate, the front 

 very convex, smooth and shining ; the flagellum pale ferruginous, 

 with two or three of the basal joints fuscous above. Thorax ovate ; 

 the metathorax truncate, and armed with two short acute spines ; the 

 legs obscure ferruginous, with the articulations palest, the trochanters' 

 very pale ; wings opake, the nervm-es rufo-testaceous, the stigma 

 fuscous. Abdomen globose, smooth and shining ; the peduncle with 

 two short acute spines, directed backwards, and slightly curved. 



Hah. Waigiou. 



23. PoLYRHACHis EuRYALUS. P. niger, Isevis, nitidus, thorace in- 

 ermi ; petioli squamula quadrispinosa. 



Worker. Length 2^ lines. Black, smooth and shining ; the thorax 

 rounded above, not spined ; the outline, when viewed laterally, semi- 

 circular ; the legs obscure ferruginous. Abdomen globose ; the node 

 of the peduncle with four spines, the two inner ones shorter than the 

 lateral pair, but all short and acute. 



Hab. Mysol. 



24. PoLYRHACHis DoLOMEDES. P. niger, thorace supra deplanato ; 

 abdominis squama spinis duabus curvatis armata ; abdomine nitido ; 

 pedibus obscure ferrugineis ; flagello flavo-testaceo. 



Worker. Length 3 lines. Black ; the head and thorax subopake ; the 

 abdomen smooth and shining ; the flagellum testaceous yellow, or 

 pale ferruginous ; the legs dark ferruginous. The thorax flattened 

 above, the anterior angle acute, or produced into short acute teeth ; 

 the metathorax unarmed ; the front of the head very prominent. The 

 abdomen globose ; the node of the peduncle with two long acute 

 spines, which are divergent and curve backwards to the shape of the 

 base of the abdomen. 



Hab. Waigiou. 



This species may very probably prove to be the worker of Polyrhachis 

 Xiphias. 



25. Polyrhachis Sparaxes. P. niger, capite thoraceque subopacis ; 

 thorace inermi ; abdominis squamula trispinosa; alis subhyalinis, ner- 

 vuris pallide testaceis. 



Female. Length 3 lines. Black ; the head and thorax finely rugose and 

 subopake ; the abdomen globose and shining ; the extreme apex 

 of the flagellum pale rufo-testaceous ; the angles of the prothorax 

 acute; the wings yellow, with the nervures pale testaceous; the node 

 of the peduncle with three acute spines, erect, and of equal length ; 

 the abdomen slightly sericeous. 



Hab. Mysol. 



