Notes of the Hemiptera of the Western Territories of the United States, chiefly from the Surveys of Dr. F. V. Hayden. Hayden's Preliminary Report of the United States Geological Survey of Montana., Hayden's Preliminary Report of the United States Geological Survey of Montana. Washington: 1872 (pt. iv.), pp. 392-423., 1872: pp. 392-423. Chapter pagination: pp. 392-423. [Zoological Record Volume 9]