HENRY J. FRANKLIN. 363 



Wings. — About as in worker. 



Legs. — Coxae, trochanters and femora usually bearing a consider- 

 able amount of light pile ; fore tibiae usually bearing little or no pile 

 other than dark brown or black ; middle tibiae usually with consider- 

 able yellowish-ferruginous pile on apical part of outer sides; hind tibiae 

 with outer faces convex and more or less bare on apical part, the fringes 

 long and more or less strongly yellowish-ferruginous ; hind metatarsi 

 with only short spines and pubescence, except for a fringe of rather 

 long hairs on the basal three-fourths of the posterior border. 



JDiinensions . — Length: queen, 13 mm. to 16^ mm.; worker, 9 mm. 

 to 12 mm. ; male, 10 mm. to 12 mm. Spread of wings : queen, 30 

 mm. to33 mm. ; worker, 21 mm. to 25 mm. ; male, 24 mm. to 26 mm. 

 Width of abdomen at second segment : queen, 7 mm. to 9 mm. ; 

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



Redescribed from thirteen queens, fifteen workers and 

 seventeen males. 



Habitat. — I have seen specimens of this species from 

 Alaska, Mackensie, "Hudson Bay Territory," Labrador and 

 Newfoundland, and it seems to be quite common in these 

 northern regions. What is its southern limit? I have seen 

 one queen labelled "Vancouver" and another labelled 

 " Colorado " and two workers labelled " Fremont Pass, Colo- 

 rado, 11,500 to 12,000 feet." These are all the specimens 

 of this species, purporting to come from the western United 

 States or southern Canada, which I have seen among some 

 five thousand specimens of bumble-bees from those regions, 

 and this indicates that the species is extremely rare in all 

 this southern part of its range and confined to the very crests 

 of the mountain ranges, being a strictly Boreal form. In the 

 east, it is not present in the United States unless it be in north- 

 ern Maine, and it is not even certain that it is present in New 

 Brunswick. Is it present in Quebec, Ontario, northern Michi- 

 gan or northern Minnesota ? It is not improbable that Prof. 

 Cockerell's records of this species from " Truchas Peak, 

 above timber line " and "top of Las Vegas Range," New 

 Mexico are correct. It is probably present in western Mon- 

 tana, western Wyoming and parts of Idaho and Washington 

 and possibly in parts of Oregon and California. My most 

 northern records are : Eagle (Alaska) ; Ft. Rae (Macken- 

 sie), and Ungava Bay (Labrador). 



TRANS. AM. ENT. SOC. , XXXVIII. 



