200 Psyche [October- December 



The workers begin to appear about the 1st of June, while the 

 males and young queens are chiefly produced in August and 

 September. The colonies, like those of Bremus impatiens, do 

 not break up until October. 



On page 99, Putnam (1865) makes the following statement 



concerning Bremus fervidus: "This species is of 



quite a gentle disposition, allowing its nests to be disturbed for 

 some time before it makes any show of resistance, merely ex- 

 hibiting its uneasiness by buzzing." I cannot subscribe to this 

 statement. Of all the species with which I have had experience — 

 including Bremus terrestris, layidarius, agrorum, muscorum, 

 sijlvarum, and helfernnus in Europe — , Bremus fervidus is by 

 far the most vicious. Usually, when its nests are disturbed, 

 one or more workers at once pounce on the intruder and punish 

 him. If he takes to his heels, they sometimes follow him for a 

 hundred yards or more. I was stung severely b}^ this species on 

 several occasions. 



Bremus fervidus, as I have pointed out recently (1922a), has 

 the interesting habit of expelling the queens and workers of other 

 Bremidse from its nests by daubing them with honey. 



Literature Cited. 



Bachmann, M. 1915. Biologische Beobachtungen an Hummeln. 



Mitteil. Miinch. Ent. Gesellsch., Vol. 6, pp. 71-112. 

 Bequaert, J. 1920. Hymenoptera Collected near Boston, Mass., 



with Description of a Variety of Bombus affinis. Psyche, 



Vol. 27, pp. 6-13. 

 Coville^ F. V. 1890. Notes on Bumble-Bees. Proc. Ent. Soc. 



Washington, Vol. 1, pp. 197-203. 

 Drewsen, C. og Schiodte. J. 1838. Fortcgnelseo ver de danske 



Arter af Slaegterne Bombus og Psithja'us. Naturhist. 



Tidsskr., Vol. 2. pp. 105-126, pi. 2. 

 Franklin, H. J. 1912/13. The Bombidae of the New World 



Trans. Amer. Ent. Soc, Vol. SS, pp. 177-486, Vol. 39, 



pp. 73-200, pis. 1-22. 



1915. Notes on Bombidse, with Descriptions of New 



Forms (Hym.). Ent. News, Vol. 26 pp. 409-417. 



