222 UNIVERSITY OF COLORADO STUDIES 



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the Relations of Ants to Plants," Bull. Amer. Mus. Nat. Hist., Vol. XXII, Art. XXIV, 



pp. 403-418, 1906. 

 , "Notes on a New Guest-Ant, Leptothorax glacialis, and the Varieties of Myrmica 



brevinodis Emery," Bull. Wis. Nat. Hist. Soc, Vol. V, No. 2, pp. 70-83, 1907. 

 , "The Polymorphism of Ants, with an Account of Some Singular Abnormalities 



Due to Parasitism," Bull. Amer. Mus. Nat. Hist., Vol. XXIII, Art. I, pp. 1-93, 1907. 

 , "The Ants of Texas, New Mexico and Arizona," Bull. Amer. Mus. Nat. Hist., 



Vol. XXIV, Art. XXI, pp. 399-485, 1908. 

 , "Honey Ants, with a Revision of the American Myrmecocysti," Bull. Amer. Mus. 



Nat. Hist., Vol XXIV, Art. XX, pp. 345-397, i< 



