HENRY J. FRANKLIN. 135 



with a mixture of dark and pale pile. Third antennal segment longer 

 than fourth, but shorter than fifth. 



Thorax. — Coloration of pile much like that of females, but the meso- 

 pleura covered with pale yellow pile to the bases of the legs ; upper 

 portion of metapleura and sides of median segment also with mostly 

 whitish yellow pile. 



Abdotnen. — Dorsum : segments one to five, inclusive, covered with 

 yellow pile ; segment six either entirely clothed with yellow pile or 

 with the very apical portion bearing black pile ; segment seven black 

 and with black pile, but sometimes with a slight admixture of yellow 

 hairs toward the sides. Venter mostly dark, but with the lateral por- 

 tions of the apical fringes of most of the segments whitish. 



Genitalia. — Outer spatha very much like that of B. penvsylvanicus 

 (fig. 126). Inner spatha much like that of peniisylvanicus (fig. 132), 

 but without a fenestra in the specimen before me. Claspers short and 

 powerful in appearance (fig. 156); the branches, as viewed dorsally, 

 with their apices broadly rounded and rather quadrate in form ; vol- 

 sellae with very large, prominent and triangular apical projections and 

 with a large and prominent rounded protuberance on the inner side of 

 each, somewhat beyond its middle. Squamae strongly bilobed, the 

 two lobes being of about equal size ; outer lobe strongly pointed and 

 reaching nearly as far as distal end of volsella ; inner lobe rounded 

 at apex and extending mesad far beyond inner margin of volsella. 

 Sagittae and uncus much like those of fervidus (fig. 102). 



IVings. — Much lighter than those of queen, only slightly iufuscate ; 

 about like those of the fervidus male. 



Legs. — Coxae all with considerable whitish pile ; trochanters mostly 

 dark, but sometimes with a few pale hairs ; femora all with much pale 

 hair, this color usually extending along their entire length, at least on 

 one side ; fore tibiae dark : middle and hind tibia3 sometimes almost 

 entirely dark, but often with a considerable ferruginous tinge to their 

 short hairs ; outer faces of hind tibiae convex and rather evenly hairy, 

 there being no trace of corbiculae. Hind metatarsi with outer faces 

 distinctly concaved and with no long fringes. 



Dintensions. — Length: queen, 16 mm. to 18 mm. ; worker, 10 mm. 

 to 13 mm. ; male, 12 mm. to 13 mm. Spread of wings: queen, 41 

 mm. to 45 mm. ; worker, 24 mm. to 28 mm. ; male, 27 mm. to 31 

 mm. Width of abdomen at second segment: queen, 8 mm. to 8', 

 mm. ; worker, 5 mm. to 6 mm. ; male, 5 mm. to 6 mm. 



Habitat. — All the specimens of this species, seen by me, 

 came from Mexico. One worker was from Eslava. Seven 

 of the queens (including the type), four of the workers and 

 the two males were collected by C. H. T. Townsend, in 

 Meadow Valley, head of Rio Piedras Verdes (six miles south 



TRANS. AM. ENT. SOC. , XXXIX. 



