OF CERAM, CELEBES, TERNATE, AND GILOLO. 37 
4. Formica circumspecTA. F. rufo-picea, antennis pedibusque pal- 
lide ferrugineis ; squamula subquadrata, supra emarginata (famina). 
F. pallide ferruginea, elongata et gracilis ; abdomine rufo-fusco (ope- 
raria). 
Female. Length 63 lines. Rufo-piceous, smooth and shining, the 
anterior part of the head, its anterior margin, the scutellum and base 
of the abdominal segments of a brighter colour; the antennz, legs, 
and scale of the peduncle pale rufo-testaceous; the head oblong, 
narrowed anteriorly, transverse behind, and slightly emarginate in the 
middle; the mandibles stout, punctured, and with a row of black 
acute teeth on their inner margin; the head slightly punctured in 
front; the scale of the peduncle subquadrate, slightly emarginate 
above. 
Worker major. 3% lines. Of a pale ferruginous, with the posterior 
portion of the abdomen fuscous; head oblong, narrowed behind the 
eyes; thorax oblong, narrow, compressed behind; the scale of the 
peduncle small, narrow, with the superior margin rounded above ; the 
thorax narrowed anteriorly, forming a sort of neck. 
The worker minor is 2 lines in length, more slender than the larger 
worker, with the antenne and legs much more elongate, the head 
narrowed behind, and the thorax prolonged into a sort of neck when 
viewed sideways. 
Hab. Celebes (Tondano). 
5. ForMICA LEUCOPH&A. F. nigra, dense cinerea, pilosa; thorace 
postice attenuato; squama oblongo-ovata. — 
Worker. Length 3 lines. Black and densely covered with a fine silky 
cinereous pile; antenne nearly as long as the body, slender, and 
filiform, the flagellum scarcely thickened towards the apex; eyes 
rather large and prominent, and situated high on the sides of the 
head; head oblong, narrowed behind the eyes. ‘Thorax oblong, 
narrowed and of equal width behind the prothorax ; legs very obscurely 
reddish, with the apical joints of the tarsi rufo-testaceous. Abdomen 
ovate, the apical margins of the segments testaceous ; the scale of the 
peduncle narrow, small, and pointed above. 
Hab. Celebes (Tondano). 
6. Formica Tropica. F. nigerrima, nitida, levissima; thorace pu- 
bescente, postice compresso ; pedibus rufo-nigris. 
Worker. Length 3% lines. Jet black, smooth, shinmg, and having a 
faint prismatic lustre, particularly on the head, which is oblong, or 
subquadrate ; the tips of the mandibles ferruginous. The prothorax 
rounded at the sides and in front; a deep constriction at the base of 
the metathorax, which is elevated and rounded above; the thorax has 
a loose long pale scanty pubescence, probably much more dense in 
specimens in fine condition; the-legs very obscurely ferruginous, 
nearly black ; the legs, particularly the tibie, have a thin long loose 
