MR. F. SMITH ON HYMENOPTEROUS INSECTS 
peduncle very coarsely and closely punctured, producing a rugged 
surface. The thorax, with two short stout acute spines bent inwards, 
the metathorax with two long divergent acute spines; the peduncle 
with two long acute spines, which curve to. the shape of the base of 
the abdomen; the legs ferruginous, more or less obscurely so. The 
abdomen globose, smooth, and shining. (Pl. I. fig. 15, and 16 var.) 
Hab. Celebes (Tondano). 
18. Potyruacuis Visipia. P. niger, capite thoraceque rude punc- 
tatis; thorace ovato, antice posticeque abdominisque squama spinis 
duabus acutis armatis ; abdomine ovato. 
Female. Length 33 lines. Black; the head and thorax with large 
deep punctures ; the head with a large prominence in front, the lateral 
margins of which are expanded into elevated fiat scales, beneath which 
the antennz are inserted, the extreme tip of the latter pale rufo- 
testaceous; the eyes very prominent. Thorax ovate, with a short 
stout spine on each side in front; the metathorax with two stout acute 
spines, rather longer than the front ones; the node of the peduncle 
with two short divergent acute spines ; the tibiee and femora ferrugi- 
nous, the apex of the latter and base of the former dusky or black ; 
the claws of the tarsi rufo-testaceous. Abdomen globose, smooth and 
shining ; the entire insect thinly covered with cinereous pubescent — 
pile. (PI. I. fig. 17.) 
Hab. Celebes (Tondano). 
19. Potyruacuis Cuaonra. P. niger, pube pallide aurea vestitus ; 
thorace bidentato ; petioli squamula bidentata ; femoribus tibiisque fer- 
rugineis ; alis fusco-hyalinis. 
Female. Length 4 lines. Black, and clothed with a cinereous pubes- 
cence, which has a pale golden lustre, particularly on the head and 
thorax ; that on the abdomen is more inclining to grey, but has a 
golden tint in some lights; the mandibles black. Thorax armed in 
front with two short acnte spines ; the legs ferruginous, with the tarsi 
black ; wings fusco-hyaline, nervures testaceous. Abdomen globose ; 
the scale of the peduncle with two short stout spimes. (PI. I. 
fig. 18.) 
Hab. Gilolo. 
20. PotyrHacHis Numeria. P. niger; thorace supra deplanato, 
spinis duabus anterioribus; abdominis squamula spinis duabus erectis 
acutis, utraque ad basin minute unispinulosa. 
Worker. Length 3 lines. Black, and covered with silky cinereous pile ; 
the thorax flattened above, and slightly curved longitudinally to the 
verge of the truncation of the metathorax, the spines on the pro- 
thorax stout, short and acute; the margins of the thorax slightly 
raised. Abdomen globose, truncate at the base; the node of the pe- 
duncle broad, transverse above with an erect spine at each latera] 
