4 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



applicable in this country and because of the possible confusion with 

 the engraver beetles, it does not seem desirable to adopt either of these 

 as a common name for the insect. Cooke gave it the name of "Imported 

 Grape Flea-beetle"; but since it is not a flea-beetle at all, this name is 

 not warranted. Since the life history and habits of this species are 

 almost identical with those of the Grape Root-worm (Fidia viticida 

 Walsh) of the Eastern States, and the fact that it is, thus far at least, 

 a grape pest in this country only in California, we have given it the 

 common name of California Grape Root-worm. 



Distribution. According to Dr. Horn 1 the obscurus or black form 

 occurs most abundantly in California and Nevada and one specimen has 

 been noted from Colorado. The vitis form extends from New Hamp- 

 shire westward to the Lake Superior region, Utah, Colorado, and Wash- 

 ington, only a few specimens coming from the last three localities. 

 Dr. Hamilton in his catalogue mentions Adoxus vitis as "widely dis- 

 tributed across the northern part of the continent, extending north 

 on Mount Washington, N. H., to the Hudson Bay region, westward to 

 California and south to New Mexico; and southward in the Atlantic 

 States through New York." A. L. Melander, entomologist of the 

 Washington Station, states that there is but a single specimen in their 

 collection taken in the Grand Coulee in 1892. Professor Cordley of the 

 Oregon Station writes that he has no record of its .occurring in that 

 state on the grape, nor has Professor Aldrich any record of its occur- 

 rence in Idaho. 



Through the kindness of A. L. Quaintance of the Bureau of Ento- 

 mology, Washington, we are able to give the localities of obscurus and 

 vitis occurring in the National Museum Collection, as follows: Mount 

 Adams and Mount Washington, N. H. ; Marquette and Port Huron, 

 Mich.; numerous specimens from New York and New Jersey; Isle 

 Royal and Michipicoten Bay, Lake Superior; Colorado Springs, 

 Veta Pass, Elk Park, and Garland, Colorado ; Bear Paw Mountain, 

 Mont. ; Park City and Alta, Utah ; Kaslo and Bear Lake, B. C. ; Easton, 

 Washington; Portland, Oregon; Placer, Alameda, Los Angeles, and 

 Sonoma, California ; and Bulah, New Mexico. 



We are indebted to Dr. E. C. Van Dyke, of the California Academy 

 of Sciences, for some interesting facts on the distribution of Adoxus, 

 from whom we quote as follows: "The various species of its native 

 food plant, Epilobium, is widely distributed over the northern parts of 

 Europe, Asia and North America. On the Pacific Slope the beetle is 

 found in all of the lowlands of western Washington and the northern 

 half of western Oregon and extends south along the Cascades (here 

 up to near the timber line, some specimens being taken at an elevation 

 of 10,000 feet on the snow fields of Mount Rainier) ; along the Sierras to 



1 Trans. Amer. Entomol. Soc., XIX, p. 198, 1892. 



