HENRY J. FRANKLIN. 117 



mm. ; male, 14 mm. to 17 mm. Spread of wings: queen, 50 mm. to 

 54 mm. ; worker, 33 mm. to 45 mm. ; male, 37 mm. to 42 mm. Width 

 of abdomen at second segment : queen, 11 mm. to 13 mm. ; worker, 6 

 mm. to 9 mm. ; male, 7 mm. to 81 mm. 



The species is here redescribed from seven queens, six 

 workers and six males. 



Habitat. — We have the following records of capture of this 

 species: Chile (Santiago, Punta Arenas and Borja Bay at 

 the Straits of Magellan); Argentina (Chubut in Patagonia); 

 Brazil (Santos, Rio de Janeiro, San Pablo and Sao Paulo). 

 I have myself seen specimens from all the localities men- 

 tioned in Chile and Argentina. Cunningham (vide supra) 

 states that the species is common at the Straits of Ma- 

 gellan. 



This species is a very striking one on account of its color 

 and size. It is easily the largest Bombus species in the 

 Western Hemisphere. It is apparently quite constant in all 

 its characters except that, in different specimens, the reddish 

 pile varies in shade from a deep orange-ferruginous to a pale 

 yellowish-ferruginous. It is probable that the deep orange- 

 ferruginous is the normal color for the species and that speci- 

 mens with the pale pile are faded. 



This species has its closest relative in dolichocephalus as is 

 shown by the structure of the genitalia of the male. Kohli 

 also seems allied. 



Bombus (Bombus) solus new species. 



Type. — Described from a single male, deposited in the col- 

 lection of the United States National Museum. 



Entirely black. Malar space of jnediutn length. Pile rather short 

 and fine. Third antennal segtnent slightly longer than the fourth. 



Queen and zvorker. — Unknown. 



Male. Head. — Face with an inconspicuous admixture of short, pale 

 pubescence with the black pile ; occiput and ventro-lateral portions 

 dark. Malar space about as long as its width at apex, about one-fifth 

 as long as eye. Clypeus densely punctate, especially toward sides, and 

 thinly hairy. Third antennal segment distinctly, but not greatly, 

 longer than the fourth ; the fifth somewhat shorter than the third and 

 fourth together. 



Thorax. — With dark pile. 



TRANS. AM. ENT. SOC. , XXXIX. 



