116 AMERICAN HYMENOPTERA. 



dian carina on epipj'gium. Some specimens with ferruginous pile on 

 pleura extending much more than half-way down from level of bases 

 of wings toward bases of legs. 



Male. Head. — Elongated. Coloration of pile like that of queen and 

 worker. Malar space much longer than its width at apex, about one- 

 third as long as eye. Clypeus, for most part, densely covered with 

 black pile. Third antennal segment shorter than the fourth, the fourth 

 shorter than the fifth. 



Thorax . — Coloration of pile as in queen and worker, but the ferru- 

 ginous color on the mesopleura sometimes reaching the bases of the 

 legs ; sides of median segment often with ferruginous pile only. 



Abdomen. — Dorsum : first five segments always covered with ferru- 

 ginous-red pile ; segment six very often entirely ferruginous, but usu- 

 ally with some black hair near its apical margin, at least in the mid- 

 dle ; segment seven very often clothed entirely with ferruginous pile, 

 but usually with a more or less strong admixture of black hairs, espe- 

 cially toward the middle of its apical portion. Venter dark. 



Genitalia. — Outer spatha (fig. 174) short and very broad, with front 

 margin very deeply incurved ; side margins also deeply incurved, so 

 as to form long anterior-lateral projections ; hind margin broadly out- 

 curved in the middle, but slightly incurved on the sides. Inner spatha 

 with two small median fenestra;, in the specimen before me, otherwise 

 much like that oi fervidus (fig. 101), but with the posterior corners of 

 its apical portion rounded. Claspers (fig. 147 and fig. 170) long, but 

 thick and powerful in appearance ; branches with inner sides of their 

 distal ends, as seen from dorsal side, sharply angled ; squams much 

 like those of fervidus and pennsylvanicus ; volsellae more or less 

 grooved longitudinally with a single groove (not always very definite) 

 not far removed from each side margin, as seen from the ventral 

 side, their apical projections large, triangular and prominent and usu- 

 ally bearing several small, though noticeable, denticles (these, how- 

 ever, are sometimes almost entirely absent) on their hind margins. 

 Sagittae with shafts long and bent outward somewhat in the middle ; 

 their heads very short, considerably foliaceous and turned ventrad, 

 with a large, prominent, recurved tooth on the outer side of each. 

 Uncus, except toward the base, very narrow and tapering slowly toward 

 the recurved apex. 



Wings. — Light, at most only moderately infuscate and sometimes 

 almost clear transparent. 



Z-^^.s. — Coxae, trochanters, femora and tibia; all clothed with black 

 pile. Outer faces of hind tibiae slightly convex and naked, their fore 

 and hind fringes long, forming good corbicula;. Hind metatarsi with 

 no long hind fringes, their outer faces strongly concaved. 



Dimensions . — Length : queen, 25 mm. to 30 mm. (From Guerin's 

 description, I judge they are sometimes somewhat longer than this. 

 He described the largest as measuring 32 mm.); worker, 12 mm. to 18 



