. Annals of the New York Academy of Sciences. Science. A/n A/ North American Rhynchophora, 229. X.\l.—On Some Netu North American Rhynchoph(^^^^^^^ '^^//^ PART I. BY THOS. L. CASEY. Read, by Title, AprU 9th, 1888. During the three years just past, the writer, whose official du- ties had previously called him to the Pacific slope of our con- tinent, has utilized his spare moments in the endeavor to amass as complete a set of the Coleoptera of those regions as lay within his power. Many portions of California, Nevada, Arizona and Texas were explored by himself in person, and other regions have c
. Annals of the New York Academy of Sciences. Science. A/n A/ North American Rhynchophora, 229. X.\l.—On Some Netu North American Rhynchoph(^^^^^^^ '^^//^ PART I. BY THOS. L. CASEY. Read, by Title, AprU 9th, 1888. During the three years just past, the writer, whose official du- ties had previously called him to the Pacific slope of our con- tinent, has utilized his spare moments in the endeavor to amass as complete a set of the Coleoptera of those regions as lay within his power. Many portions of California, Nevada, Arizona and Texas were explored by himself in person, and other regions have contributed through the skillful collecting of Dr. K. W. Shufeldt of the United States Army, near Fort Wingate, New Mexico, and Mr. Gr. W. Dunn at El Paso, Texas, and Benson, Arizona. He cannot fail also to express his obligations to Mr. W, a. W. Harford and Mr. 0. Fuchs, of Oakland, Oal., for many valuable additions. The total number of species thus brought together and safely transported across the continent, amounts to about three thousand five or six hundred, and their identification and incorporation with the others is a labor of great weight, rendered doubly diffi- cult by the very large proportion of undescribed forms. It has been my special aim to obtain as large a series as possible of every species, for the purpose of studying variation, and these series have already proved one of the greatest aids in estimating the validity of closely allied forms. Species of some genera, which were thought to be very unstable and arbitrary, because of the isolated specimens from different regions which have hitherto been their sole representatives, are, by these fuller series, shown to be far less so, and they seem to indicate that there are many species, differing among themselves in purely external character- istics of form or sculpture, which are as valid as others differing in those modifications of special organs which have been selected as the criteria for specific distinctio
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