1917] Wheeler—Social Parasitism of Lasius subumbratus Viereck 175 
of crinitus from Sikkim and was struck by their remarkable re- 
semblance in color and pilosity to the queens of the Colorado F. 
ciliata. The source of the delicate odor of subumbratus, of the 
strong, lemon-verbena odor of our North American Lasii of the 
subgenus Acanthomyops and of the peculiar pungent, sweetish 
odor of the Eurasian fuliginosus, is worthy of further investiga- 
tion. Meinert and Bonner believe that in wmbratus and fuligi- 
nosus it comes from the salivary glands. Forel had previously 
traced it to the head as this portion of the body when crushed 
emitted a more violent aroma than the thorax and gaster. I have 
been under the impression that it might originate in the epinotal 
glands. Since it is so powerful and pervasive that it even sat- 
urates the walls of the nest a renewed and careful investigation 
may be required before its precise source in the body of the insect 
is known. 
LITERATURE. 
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och deras Lefnadsf6rhallanden. Bih. K. Svensk. Vet.-Akad. 
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1915. Bonner, W. Der temporiire soziale Hyperparasitismus von 
Lasius fuliginosus und seine Beziehungen zu Claviger longi- 
cornis Miill. Zeitschr. f. wiss. Insekt. Biol. 11, 1915, pp. 
14-20. 
1909. Crawley, W. C. Queens of Lasius umbratus Nyl., Ac- 
cepted by Colonies of Lasius niger L. Ent. Month. Mag. 
(2) 20, 1909, pp. 94-99. 
1910. Crawley, W.C. Workers of Lasius flavus (? L. umbratus) 
among Lasius fuliginosus. Ent. Rec. 22, 1910, pp. 67-69. 
1913. Crawley, W. C. and Donisthorpe, H. St. J. K. The Found- 
; ing of Colonies of Queen Ants. Trans. Second Intern. Ent. 
Congr. (1912) 1913, 2, pp. 11-77. 
1911. Donisthorpe, H. St. J. K. Further Observations on 
Temporary Social Parasitism and Slavery in Ants. ‘Trans. 
Ent. Soc. London, 1911, pp. 175-183. 
1913. Donisthorpe, H. St. J. K. On Some Remarkable Associa- 
tions between Ants of Different Species. Rep. Lancast. 
Ches. Ent. Soc. 36 (1912), 1913, pp. 38-56. 
1915. Donisthorpe, H.St.J.K. British Ants, Their Life-History 
