67 



chestnuts were abundant in that section, but are now on a steady and 

 swift decline. The specimens sent were taken from a large tree about 

 half dead and very badly infested with this borer, the leaves having 

 wilted at this time. The characteristic channels of this species of 

 Agrilus could be seen on the trunk to a distance of about 7 feet, run- 

 ning under the bark across the cambium. The insect appeared to kill 

 the trees about the month of May, the trees dying in a few weeks after 

 attack (presumably after the emergence of the adults), the leaves look- 

 ing as if they had been scorched. 



LIST OF SPECIES AND THEIR FOOD PLANTS. 



A. abduct as Horn. — Observed by the late H. G. Hubbard and by Mr. E. A. Schwarz 

 at Oracle, Ariz., on Quercus arizonica, July 7 (unpublished note). 



A. abstersus Horn. — Reared by Hubbard and Schwarz from twigs of Acacia greggii 

 at Santa Rita Mountains, Arizona, in May (unpublished). 



A. acutipennis Maun. — On foliage of oak shrubs, June, July, Mass. — Blanchard 

 (Ent. Amer., Vol. V, p. 32). A variety was taken by Dr. Blanchard on poplar sprouts 

 (Tr. Am. Ent. Soc, Vol. XVIII, p. 308). 



A. anxius Gory. — The bronze birch borer. Injurious to birch (Betula alba, papy- 

 ri/era, etc.), and willow (Salix discolor) and probably to poplar, June, July, central 

 and western New York.— See writer's article in Bui. No. 18, n. s. , Div. Ent., pp. 

 44-51. 



A. arcuatus Say. — Beaten from oak, elm, and hazel. — Stromberg, Can. Ent., Vol. 

 XXVI, p. 36. Var. cory li "On the hazel " (Corylus americana), June, July, Mass. — 

 Blanch. (I.e.). 



A. bilineatus Weber. — The two-lined chestnut borer. Injurious to living chestnut 

 (Castanea dentata) and oak of several species, May-July, D. C. — See articles by 

 writer in Bui. No. 7, n. s., Div. Ent., pp. 67-75; Circ. No. 24, 2d ser., pp. 1-8. Mr. 

 Harrington has taken it upon beech and believes it to infest that tree (Rept. Ent. 

 Soc. Ont. 1896, p. 71). 



A. couesii Lee. — "On Mentzelia nuda' 1 Santa Fe, N. Mex., Aug. 3. — T. D. A. Cock- 

 erell (Journ. N. Y. Ent. Soc, p. 150, Sept., 1897). 



A. caneus Lee. — Bred from Croton capitatum; also occurs on Croton eleagnifolium in 

 Texas. — Schwarz (unpublished note). 



A. dijficilis Gory, (occidentalis Uhler). — "Obtained from a species of willow," 

 Indiana— Uhler (Proc. Ac. Phila., Vol. VII, p. 416, 1855). 



A. egenus Gory. — Infests locust (Robinia pseudacacia), mining under the bark and 

 twigs of the smaller branches, the beetles eating the leaves. — See notes by writer in 

 Entomologica Americana, Vol. V, p. 219; hickory (Hicoria alba). — Reared by the 

 writer and others. Reared from Robinia neomexicana in Arizona by Hubbard and 

 Schwarz. 



A. fall ax Say.— Habits similar to egenus. In the National collection is a series 

 from central Missouri labeled by Dr. O. Lugger "on locust," and another series from 

 Iowa similarly labeled by the late Dr. C. V. Riley. Among Divisional notes is one 

 of the occurrence of what is stated to be this species under the bark of cottonwood 

 in July. "Infesting bark and wood of dying branches on living and dying hack- 

 berry." (Celtis occidental is). — Hopkins (Bui. No. 32, W. Va. Ag. Expt. Sta., p. 184). 

 Beaten from oak— Stromberg (1. c.) 



A. felix Horn. — Reared from "Palo verde" (Parkinsonia microphylla) at Catalina 

 Springs, Ariz. — Hubbard and Schwarz (unpublished note). 



A.Jiondanus Crotch. — Observed by Mr. Schwarz at Tampa, Fla., on Quercus. 



A. granulatus Say. — The Loinhardy poplar borer. Injurious. — T. J. Burrill (12th 

 Rept. St. Ent. Ills., pp. 121, 122; Fifth Rept. U. S. Ent. Com., pp. 443, 444). "Breeds 



