40 MR. F. SMITH ON HYMENOPTEROUS INSECTS 
margins raised, armed in front with two divergent flattened acute 
spines; the metathorax truncate, and with the margin at the verge of 
the truncation acute and slightly raised; the node of the peduncle 
armed with two long acute divergent spines which curve backwards 
over the base of the abdomen; the latter globose. (Pl. I. fig. 8.) 
Hab. Celebes (Tondano),. 
11. Pouyruacuis Democues. P. niger, aureo-sericeo vestitus ; tho- 
race ovato, metathorace spinis duabus brevibus obtusis ; squama spinis 
duabus acutis armata. 
Female. Length 33 lines. Black, covered with golden pubescent pile, 
the head and thorax thinly so. The thorax ovate; the verge of the 
truncation of the metathorax notched, the lateral angles forming short 
blunt spies; the node of the peduncle with two acute short spines, 
and in the middle of its upper margin with a notch, the angles of 
which are slightly elevated, forming two minute teeth or spines; the 
abdomen globose ; the legs black and shining. (PI. I. fig. 9.) 
Hab. Celebes (Tondano). 
12, PotyrHacuis VALERUuS. P. capite abdomineque nigris ; thorace, 
squama femoribusque rufis; thorace quadrispinoso ; petioli squamula 
bispinosa. 
Worker. Length 34 lines. Black, with the thorax, scale of the petiole, 
the coxz, trochanters and femora ferruginous; the head opake, the 
face with short cinereous pubescence. The thorax with a thin shming 
cinereous pile; the spines on the thorax in front short, stout, and acute ; 
the metathorax with two long slightly divergent spines directed back- 
wards and tipt with black; the node of the peduncle with two long 
acute spines directed backwards over the base of the abdomen, their 
apex black. Abdomen globose and covered with silky pile, the ex- 
treme base, ferruginous. (PI. I. fig. 10.) 
Hab. Celebes (Tondano). 
13. PoLYRHACHIS TRISPINOSUS. P. niger, levis nitidusque ; thorace 
inermi ; petioli squama trispinosa. 
Female. Length 4 lines. Jet black, smooth and shining; the antennee 
long and slender with the apical half ferruginous; the front of the 
head very convex. Thorax ovate, very delicately striated, the strie, 
short and irregular, may be called a faint scratching; wings wanting ; 
the node of the peduncle with three short acute spines above; the 
claws of the tarsi rufo-testaceous. Abdomen ovate and very smooth 
and shining. (PI. I. fig. 11.) 
Hab. Celebes (Tondano). 
14, Potyruacuis DiapuHantus. P. niger et vestitus pube argentea ; 
thorace quadrispinoso ; petioli squamula bispinosa. 
Worker. Length 23 lines. Black, and densely clothed with silky sil- 
very pile; the flagellum has the tips of the basal joints, and six or 
