422 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
hind. Eyes rather small. Maxillary palpi moderately long. Pro- 
and mesonotum, especially the latter, convex; mesoépinotal constric- 
tion short and rather deep; epinotum in profile with subequal base 
and declivity, both straight and forming a large, obtuse angle with 
each other. Petiole narrow, cuneate in profile, thick at the base, its 
anterior surface rather strongly convex, its posterior surface flat, its 
border obtuse, seen from behind rounded and entire. Legs rather 
stout. 
Body and legs shining; very delicately shagreened, more coarsely 
on the metapleurae. Mandibles and clypeus subopaque, very finely 
and densely longitudinally striated, the former also with small, sparse, 
shallow punctures. Frontal area smooth and shining. 
Head, throax, border of petiole, gaster, and fore coxae beset with 
long, erect, subobtuse, rather slender, silvery white hairs; those on 
the gula being as long as those on the upper surface of the head. Legs 
with only a row of hairs on the flexor surfaces of the femora and the 
usual row of bristles on the corresponding surfaces of the tibiae. 
Pubescence white, long, and sparse on the gaster, shorter and even 
sparser on the head, thorax, and legs, very fine and dense on the scapes. 
Yellowish red; gaster black; in small workers the posterodorsal 
portion of the head, and the upper surface of the thorax and petiolar 
border often dark red or brownish. 
Fremaue. Length 7.5-9 mm. 
Closely resemblIng the worker in color, sculpture, and pilosity, but 
the posterodorsal portion of the head, three large blotches on the 
mesonotum, the metanotum, and often also the posterior portion of 
the scutellum, and portions of the meso- and metapleurae fuscous. 
Gaster sometimes dark reddish brown, with a pale red spot at the 
base of the first segment. Wings colorless, with brown veins and 
black stigma. The middle of the clypeal border is flattened, and has a 
broad but shallow, sinuous excision. The petiole is broad, with a 
compressed, sharp border which is often produced upward in the middle 
as a blunt angle. 
Mate. Length: 7-8 mm. 
Mandibles rather short and broad, pointed, edentate. Head broad 
behind, with straight border, much narrowed in front, with straight 
cheeks. Eyes large. Clypeus convex, with entire, broadly rounded 
anterior border. ‘Thorax and gaster rather slender. Petiole low and 
transverse, somewhat compressed anteroposteriorly, especially above, 
so that the border is less blunt than in the males of many other 
species of Formica; seen from behind the border is feebly and broadly 
excised. Stipes of genitalia with their tips projecting some distance 
beyond the volsellae and sagittae. 
Head and thorax, including the frontal area, opaque. Mandibles, 
pleurae, and gaster somewhat shining. 
