OF CERAM, CELEBES, TERNATE, AND GILOLO. 41 
seven of the apical joints entirely ferruginous; the thorax convex 
above, the anterior spines short, stout, and acute; the metathorax 
with two very stout, acute divergent spines; the node of the petiole 
with two long spines very stout, acute, and curving round the base of 
the abdomen; the abdomen globose. The anterior tibiz obscurely 
ferruginous, their base black. (PI. I. fig. 12.) 
Hab. Celebes (Tondano). 
15. Potyruacuis Amanus. PP. niger, levis, nitidus; thorace antice 
et postice spinis duabus longis acutis armato ; squama spinis duabus 
longis curvatis ; femoribus basi pallide ferrugineis. 
Worker. Length 3 lines. Jet black, smooth and shining, the thorax 
finely roughened and sub-opake; head very prominent in front, tips 
of the mandibles and of the jomts of the flagellum, as well as the 
palpi, rufo-testaceous, five or six of the apical joints of the flagellum 
entirely so. Thorax, the spines in front short, stout, acute, and 
curved inwards ; those on the metathorax elongate, extending over the 
base of the abdomen and very acute; the spines on the node of the 
peduncle slender, very acute, and curved to the shape of the base of 
the abdomen; legs elongate, obscurely ferruginous, with the coxz, 
trochanters, and base of the femora pale testaceous, the claws of the 
tarsi testaceous. Abdomen globose, highly polished and impunctate. 
(Pl. I. fig. 13.) 
Hab. Celebes (Tondano). 
16. PoLyrRHACHIS CLEOPHANES. PP. niger, pube argentea vestitus ; 
capite thoraceque rude punctatis, spinis acutis antice et postice armatis; 
petioli squamula bispinosa ; femoribus basi ferrugineis. 
Worker. Length 3} lines. Black, the abdomen shining; head and 
thorax coarsely and closely punctured, rugose, and covered with sil- 
very pubescent pile ; the prominence on the front of the head, under 
the sides of which the antennz are inserted, very much elevated; the 
eyes very prominent; the spines on the thorax in front short, diver- 
gent, stout, and acute ; those on the metathorax more slender, acute, 
and curved backwards; the node of the peduncle with acute spines, 
which curve backwards over the base of the abdomen; the base of 
the femora more or less ferruginous, sometimes totally black. (PI. I. 
fig. 14.) 
Hab. Celebes (Tondano). 
This is very probably the worker of P. Vibidia. 
17. PoLYRHACHIS EXASPERATUS. P. niger, capite thoraceque rude 
punctatis, abdomine nitido; thorace antice et postice spinis duabus 
longis acutis armato; squama spinis duabus longis curvatis acutis 
armata; pedibus obscure ferrugineis. 
Worker. Length 2} lines. Black; the head anteriorly, the mandibles 
and flagellum obscure ferruginous ; the head, thorax, and node of the 
