HENRY J. FRANKLIN. 419 



incurved so as to be almost semicircular ; anterior border widely and 

 rather deeply incurved ; lateral margins incurved somewhat at bases 

 of terminal lobes ; anterior lateral projections rather broad and rounded. 

 Inner spatha (fig. 139) fully twice as wide as long; front border un- 

 usually thickened with chitin ; hind portion broadly trapeziform and 

 unusually wide, with two scattered patches of rather short hair on each 

 side of the ventral surface, the anterior ones on slight lobations in the 

 side margins and the posterior ones on the sides of the apex ; margin 

 of apex slightly incurved. Claspers and sagittae (figs. 73 and 82) as 

 already described for the group ; much resembling those of auricomus, 

 but the inner lobe of the squama much narrower than in that species 

 and the outer lobe longer and more pointed at apex. 



Wings. — Somewhat lighter than those of workers, only moderately 

 stained with brown ; the fore pair darkest in the median and sub- 

 median cells and in the region beyond the veins. 



Legs. — Coxae, trochanters and posterior femora sometimes entirely 

 black, but as often with a large amount of light pile on their lower 

 sides ; anterior and middle femora sometimes mostly dark, but always 

 with more or less light pile, at least on the lower side of their basal 

 portions; fore and middle tibiae often entirely dark, but usually with 

 more or less ferruginous or pale yellow pile on their posterior sides, 

 especially toward the apices ; fringes of hind tibiae occasionally en- 

 tirely black, but usually more or less strongly ferruginous ; the fore 

 fringes rather short and the hind ones only moderately long'; posterior 

 metatarsi about two and one-half times as long as their greatest width, 

 and with long, light yellowish or ferruginous fringes. 



Dimensions. — Length: queen, 18 mm. to 22 mm. ; worker, 15 mm. 

 to 18 mm.; male, 13 mm. to 17 mm. Spread of wings: queen, 42 

 mm. to 48 mm. ; worker, 38 mm. to 42 mm. ; male, 32 mm. to 37 

 mm. Width of abdomen at second segment: queen, 9^ mm. to 12 

 mm. ; worker, 9 mm. to 9^ mm. ; male, 7 mm. to 8^ mm. 



Redescribed from numerous queens (two of them homo- 

 types), six workers and nine males (one a homotype of im- 

 probtis) . 



Habitat. — I have records of this species from British Col- 

 umbia, Alberta, Washington, Montana, California, Nevada, 

 Colorado, Arizona and New Mexico. It must also be present 

 in Idaho, Oregon, Wyoming and Utah. Dr. Ashmead re- 

 corded it as present in Alaska, and I think that this is prob- 

 ably correct, my most northern record being Fort Macleod, 

 British Columbia. Mr. M. H. Swenk reports the species as 

 ranging east in Nebraska as far as West Point, and this 

 seems to indicate that it is present in the Dakotas and the 



TRANS. AM. ENT. SOC, XXXVIII. 



