ADDITIONAL NOTES 275 



But in a nest in an earlier stage kept under observation 

 in 19 1 2 the eggs were laid in cells that contained no 

 pollen, although in at least one case pollen was put into 

 the cell and removed before the eggs were laid. Should 

 future investigation show that latreillellus is a pollen-primer 

 only under abnormal conditions, a better name for the 

 group, consisting of ruderatus, hortorum, latreillellus, and 

 distinguendus, would be " Long-faced Humble-bees " ; the 

 term " pollen-primers " could then be restricted to ruderatus 

 and hortorum. Latreillellus and distinguendus are not 

 closely related to ruderatus and hortorum. 



Development of the Queen (p. 50). I have succeeded in 

 getting queens reared by B. latreillelhis from eggs laid 

 early in the queen's life in the following manner : Two 

 latreillellus nests, in which a few workers had already 

 emerged from the first batch of cocoons, were joined 

 together, and the queens and all the young larvae were 

 removed, and also all the eggs except three. The larvae 

 that hatched from these three eggs had thus about twenty 

 workers to care for them exclusively, and they developed 

 into females as large as queens. That these were really 

 queens and not giant workers was shown by the fact that 

 they paid no attention to the brood that was subsequently 

 reared, and as soon as they were old enough to fly they 

 left the nest for good. 



An attempt to breed from Queens of Bombus soroensis. 

 On May 25, 19 12, I received from Mr. E. B. Nevinson 

 at Abersoch two queens of B. soroensis, from which I 

 attempted to breed in the manner explained on pp. 1 3 1 

 and 132. Within three days they had settled down 

 together very contentedly, and on the fifth day it was 

 plain they had eggs, which they incubated assiduously. 

 I gave them two just-hatched terrestris workers on June 1, 

 and a just-hatched lapidarius worker on June 4. The 

 brood lump swelled rapidly on June 7 and 8, but on the 

 morning of June 9 I was disappointed to find it much 

 smaller and three half-fed larvae lying in the vestibule. 

 Examination of the lump showed that it contained one 



t 2 



