I 



MBLtOGRAPnY or IT. S. NATIO.^AL MtlSlZUjr. 361 



Notes on North American Psyllid.T. 



(Proc. Biol. Soc. Wasb., ii, 1882-1884, pp. G7-79.) 

 Printeil as separate, with same title. WaKhington, April 10, 1884. 

 Notice of earlier studies of European and North American PsylUda;; list of 

 the 18 nominal species of PayllidcB hitherto described from North America; 

 ftystomatic and synonymical list of the same ; descriptions of VachypatjUa, n. g. 

 (psylUncv) and of its three known species — /*. rennnfa, P. celtidiH-mamma, and 

 F. (Blaatojyhj/sa [new subgenus]) celtidi'i-genima,^. s}).; dicliotomic table of 

 these three species of Pachypsylla ; descriptions of Ceropsylla, n. g. (Iriozina), 

 C. sideroxjjli^ u. sp., Rh\nops\jlla, n. g. {triozinw), and Rh. achwarzii, n. sj). 



The Silk Industry in the United States. 



(Science, iii [No. 57, March 7, 1884], pp. 290-292.) 



Review of Wm. C. Wyckoff's "Silk manufacture in the United States" 

 [not seen] ; early history and present status of silk-culture in North America; 

 criticism of Wyckofl's estimates of the amount of silk raised in early times; 

 respective relations of silk-culture and silk manufacture to questions of free 

 trade and protection in the United States. 



Remarks on the Bag- worm : Thryidopferyx epliemerceformis. 



(To be published in Proc. Biol. Soc. Wash., 2, 1882-1884 (April, 1884), pp. SO- 

 BS, figs. 1-3.) 



Printed as separate. Washington, April 10, 1884. 



Explanation of the more important and less known facts in relation to the 

 life-history of Thryidopteryx ephemerw/orviis, especially in reference to the act 

 of coition and the occurrence of parthenogenesis; figures of the insect in all 

 stages and of the external male genitalia. 



Introduction. (U. S. Department of Agriculture, Division of Entomol- 

 ogy.) Reports of observations. [Bulletin, No. 4.] Washington, 

 May 3, 1884, pp. 7-8. 



Notices of the several reports of agents of the Division of Entomology of 

 the U. S. Department of Agriculture, published in Bulletin No. 4 of that 

 division. 



Acronycta betulae, n. sp. 



(Bull. Brooklyn Entom. Soc, 7, May, 1884, pp. 2-3, fig, — .) 



Describes Acronycta letulw, n. sp., reared from Betula nigra; seasons and 



habits of larva; comparison with related species. 



* 



Quelques mots sur les insecticides aux fitats-Unis, et proposition d'un 

 nouveau remade contre le Phylloxera. 



(Communication faite 5, la Soci6t6 d'Agriculture cte I'H^rault k la stance 

 du 30juin 1884. Montpellier, 1884. pp. 1-8. 8vo.) 



Address made at meeting of Soci<?t6 d'Agriculture de l'H6rault, at-Mont- 

 pellier, France, June 30, 1884. Resistant vines better than the best insecti- 

 cides as a means against Phylloxera rasfatrix; mention of jirincipal insecticides 

 in nse in America, especially arsenical substances, petroleum, and pyrethrum, 

 the modern improved nse of which the anthor introduced; method of action 

 and mode of application of these insecticides, especially ajjplication by the 

 cyclone nozzle, and the subterranean application of kerosene emulsion as a 

 means against Ph. vastatrix; believes tobacco vapor, under favorable condi- 

 tions, TTonld kill this insect. 



