328 ANXALS NEW YORE ACADEMY OF SCIENCES 



evenly arched above in profile, epinotum with subequal base and declivity 

 meeting in a rounded, obtuse angle. Petiole high, compressed anteropos- 

 teriorly, with feebly convex anterior and flattened posterior surface ; border 

 entire, evenly rounded and rather blunt. Gaster of the usual shape. Legs of 

 moderate length ; middle and hind tibiae neither compressed nor sulcate, ellip- 

 tical in cross section. 



Entire surface smooth and shining ; mandibles coarsely striato-punctate. 



Head, thorax, scapes and legs covered with scattered, rather small, but deep 

 punctures ; intermingled with these on the cheeks, clypeus, front and vei'tex, 

 there are large but equally scattered punctures or foveolse, those on the cheeks 

 being elongated. Gaster very finely, transversely shagreeued and with scat- 

 tered, piligerous punctures. Pubescence apparently lacking. 



Hairs white or pale yellow, delicate, abundant, short and erect on the body, 

 longest on the gaster. Anteuual scapes and legs with numerous short, erect 

 hairs. Flexor surfaces of middle and hind tibite with a few short bristles at 

 their distal ends. 



Deep black throughout ; mandibles, clypeal border and cheeks rarely deep 

 red ; tarsi brownish towards their tips ; posterior edges of the gastric segments 

 dull bro^-n. 



Wofker minor. Length, 7-9 mm. 



Head similar to that of the worker major, but little longer than broad, with 

 less convex sides, short and broadly rounded behind. Eyes feebly convex. 

 Clypeus subcarinate. Antennal scapes extending about one-third their length 

 beyond the posterior corners of the head. Epinotum and petiole like those of 

 the worker major, but basal surface of the former longer in proportion to the 

 length of the declivity. 



Sculpture, pilosity and color as ip the worker major. 



Female. Length, 1.3-15 mm. 



Very similar to the worker major. Sides of head less convex. Epinotum 

 with flattened base, shorter than the abrupt, concave declivity. Petiole even 

 more compressed anteroposteriorly than in the worker major, with sharper 

 border, narrowed and feebly excised above. Wings long (15 mm.), strongly 

 tinged with brown ; veins and stigma brown. 



21 ale. Length, 9-10 mm. 



Head, including the eyes, about as broad as long, evenly rounded and broad- 

 est behind ; cheeks subparallel, slightly concave, about as long as the eyes. 

 Mandibles edentate. Clypeus convex, but scarcely carinate, with broadly 

 rounded, entire anterior border. Ocelli very small. Antennae long and slender ; 

 first funicular joint incrassated distally, a little longer than the second. 

 Thorax robust ; epinotum convex, sloping, without distinct basal and declivous 

 surfaces. Petiole thick, rather high, transverse, evenly rounded and blunt, 

 slightly impres.sed in the middle above. Gaster slender. Legs long, with long 

 tarsal claws and very large empodia. 



Surface of body very finely and densely shagreened ; mandibles, head, pro- 

 and mesonotum subopaque. i-emainder of thorax, gaster and legs shining. 



Pilosity similar to that of the worker, but less abundant, absent on the 



