1972] 
Cooper - — Boreus 
281 
than that in North America — a datum of considerable ecologic and 
zoogeographic interest. 
Acknowledgement 
It is pleasant to express my gratitude to those who have so gen- 
erously helped me. Dr. Hildegard Striibing and Prof. Dr. Erich 
Wolf, of the Freien Universitat Berlin, many years ago made spe- 
cial collections and cytological preparations of Borens hyemalis for 
me. Dr. Hugh B. Leech, of the California Academy of Sciences, 
loaned me specimens of Boreus borealis Banks. Prof. George Byers, 
of the University of Kansas, loaned specimens of his Boreus brevi- 
caudus and B. coloradensis, and commented helpfully on a draft of 
the description of the externals of the new species. Prof. A. Foro- 
stenko, University of California at Riverside, and my son Geoffrey 
translated many of the Russian passages, and Prof. Louis Pedrotti, 
also of UCR, translated Czechoslovakian accounts by Lokay (1908, 
1912) and Obenberger (1928) (all in Casopis) which dispell any 
residual doubt concerning Lokay’s Sedmihrad collections. 
Literature Cited 
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