CLASSIFICATION OF THE CRYPHALINA, WITH 
DESCRIPTIONS OF NEW GENERA 
AND SPECIES.’ 
By A. D. Hopkins, Ph. D., 
In Charge of Forest Insect Investigations. Bureau of Entomology. 
INTRODUCTION. 
The superfamily Scolytoidea is represented in North and South 
America, Europe, and Asia by some of the most destructive insect 
enemies of forest trees and their commercial products; also, by a 
very destructive enemy of clover, and by several species which injure 
or destroy fruit trees. 
This is the fourth contribution toward a monograph of the scoly- 
toid beetles. It was prepared for publication as Part IV of Techni- 
cal Series, No. 17, of the Bureau of Entomology, but owing to the 
discontinuance of that series m the new plan of departmental publi- 
cations, it has been placed in the series of Reports of the Office of 
the Secretary. Technical Series, No. 17, Parts I and II, of the 
Bureau of Entomology, comprise the first and third contributions; 
the first of these, Part I, is entitled ‘‘ The Genus Dendroctonus;”’ 
the third, Part II, is entitled ‘“‘ Preliminary Classification of the Su- 
perfamily Scolytoidea.”” The second contribution, entitled ‘ List of 
Generic Names and Their Type-Species in the Coleopterous Super- 
family Scolytoidea,’’ is published in the Proceedings of the United 
States National Museum, volume 48, No. 2066, pages 115-136. 
The subfamily Cryphaline of the family Ipide includes a group of 
ambrosia beetles, also known as pinhole borers and timber beetles, 
which are exceedingly detrimental to crude forest products, wine and 
beer casks, and other similar products; a species destructive to the 
tea plant in Ceylon, and many seed-infesting insects, especially those 
of the date palm. 
The fact that so many undescribed species and genera in the sub- 
family have been found in the course of the field and laboratory in- 
vestigations carried on by the writer during the past 20 years and 
the fact that many of them are of special economic importance make 
it necessary that they be named, described, and classified as a basis 
for a detailed study of their habits and seasonal histories and of the 
methods for combating them. 
1 Contribution toward a monograph of the scolytoid beetles. 
Note.—This is a technical report of interest to entomologists generally. 
