H. J. FRANKLIN. 159 



Abdotiien. — Dorsum: segment one yellow; segment two usually 

 mostly black, but its basal middle usually with more or less yellow 

 pile, this pile sometimes extending to the hind margin of the segment ; 

 segment three black ; segment four yellow, but usually with a little 

 black pile in the very middle ; segment five like segment four, but 

 usually with more black pile in the middle ; segments six and seven 

 black. Venter, except at the base, clothed mostly with yellow pile. 



Wings. — Much like those of the queen and worker. 



Legs. — Coxae, trochanters and femora with much yellow hair; fore 

 and middle tibiae mostly dark ; hind tibiae with outer faces slightly 

 hairy, their fringes usually with more or less pale ferruginous hairs ; 

 hind metatarsi with long, pale ferruginous hind fringes. 



Dimensions. — Length : queen, 13| mm. to IS mm. ; worker, 10 mm. 

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

 34 mm. ; worker, 22 mm. to 31 mm. ; male, 22 mm. to 27 mm. Width 

 of abdomen at second segment : queen, about 9 mm. ; worker, 6 mm. 

 to 8 mm. ; male, \\ mm. to 7 mm. 



Redescribed from three queens, seventeen workers and 

 seven males. 



Habitat. — Most of my records for this species are Califor- 

 nian, as follows : Santa Clara County, Lake County, Nevada 

 County, San Jose County, Mendocino, Sonoma County, 

 Palo Alto, Yosemite, I have seen one worker from Nevada. 

 It seems to be a common species in California, at least in 

 some localities. 



The species is a rather pretty one, the yellow pile being 

 very bright and contrasting sharply with the black. 



I take pleasure in naming this species for Prof. C. H. 

 Fernald. 



Boiiibus (Bombus) aiubiguus new species. 



Types. — Described from one queen (the type) deposited 

 in the collection of Leland Stanford Jr. University and six 

 workers (cotypes) distributed evenly in the collections of the 

 American Entomological Society, the Massachusetts Agri- 

 cultural College and Leland Stanford Jr. University. 



Pile of medium length and rather coarse in texture. Face and occi- 

 put ivith considerable yellow pile. Dorsum of thorax zvith mixed black 

 and yellow pile in front and mostly dark between the bases of the wings 

 and on the scutellum ; mesopleurce yellow ; dorsum of abdomen yellow 

 at base, black in the middle and black or slightly ferruginous at apex ; 

 wings rather strongly stained with broivn. Malar space long. 



TRANS. AM. ENT. SOC. , XXXVII. 



