06 NINETEENTH REPORT STATE ENTOMOLOGIST OF MINNESOTA—I9Q22 
Van Duzer, E. P. 
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ot Mexico, with descriptions of some new species. Trans. Amer. 
Ent. Soc., xxx, 1904, pp. 1-80. 
1917 Catalogue of the Hemiptera of America north of Mexico excepting 
the Aphididae, Coccidae, and Aleurodidae. Univ. Calif. Publ., Div. 
Ent. Tech. Bul., ii, pp. i- xiv-+-1-902. 1917. 
Wuite, W. P. 
1910 The thermoelement as a precision thermometer. Physical Review, xxx1, 
p. 135. 
Yoruers, M. A. 
1911 Perillus claudus, a beneficial insect. Can. Ent., xliii, p. 418, 1911. 
ZIMMER, JOHN Topp 
1912 The Pentatomidae of Nebraska. Univ. Nebraska Studies, xi, No. 3, 
IQII, pp. 219-251. 1912 
