ADDITIONAL NOTES 275 
But in a nest in an earlier stage kept under observation 
in I912 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 /atrezlle/lus is a pollen-primer 
only under abnormal conditions, a better name for the 
group, consisting of ruderatus, hortorum, latreillellus, and 
adistinguendus, would be “ Long-faced Humble-bees” ; the 
term “ pollen-primers ” could then be restricted to vuderatus 
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 JS. /atretllellus 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 larve were 
removed, and also all the eggs except three. The larve 
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 Lomdbus soroénsis.— 
On May 25, 1912, I received from Mr. E. B. Nevinson 
at Abersoch two queens of &. soroéuszs, from which I 
attempted to breed in the manner explained on pp. 131 
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 ¢errestris workers on June I, 
and a just-hatched /apedarius worker on June 4. The 
brood lump swelled rapidly on June 7 and 8, but on the 
morning of June g I was disappointed to find it much 
smaller and three half-fed larve lying in the vestibule. 
Examination of the lump showed that it contained one 
T 2 
