miiLiCHJKAl'HV of i . S. NATIONAL MUSEUM. 361 



Notes on North American Psyllidffi. 



(Proc. Biol. Sue. Wash., ii. 1882 1884, pp. 67-79.) 



Printed as separate, with same title. Washington, April 10, 1884. 

 Notice of earlier studies of European and North American 1'syllida-; list of 

 the 18 nominal species of PtjflUda hitherto described from North Ameriea; 



systematic and synonymical list of the same ; descriptions of I'achypnylla, n. g. 

 (psyUinaf) and Of its three known species — /'. minx to, I', celtirfis-inamma, and 

 P. {HUmtophysa- [new subgenus]) OSlttcKs-psweui, n. k}».; dichotomic, table of 

 these three species of Pachypsylla ; descriptions of ('cropxylla, n. g. (trioz'mo), 

 C. sideroxyli, n. sp., Iihinopnylla, n.'g. (triozina;), and lih. schwarzii, n. up. 



The Silk Industry in the United States. 



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



Review of Win. C. WyckofF's "Silk manufacture in the United States" 

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

 criticism of Wyckoflf'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 Staten. 



Kemarks on the Bag-worm: Thryidopteryx ephemerwformis. 



(To be published in Proc. Biol. Soc. Wash., 2, 1882-1884 (April, 1884), pp. 80- 

 83, 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 ephemerteformis, 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 betulse, n. sp. 



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

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

 habits of larva; comparison with related species. 



Qnelques mots sur les insecticides aux I^tats-Unis, et proposition d'un 

 nouveau remede contre le Phylloxera. 



(Communication faite h, la Socie'te' d'Agriculture de l'He'raiilt a la seance 

 dn 30 join 1884. Montpellier, 1884. pp. 1-8. 8vo.) 



Address made at meeting of Socidte" 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 vastatrix ; mention of principal insecticides 

 in use in America, especially arsenical substances, petroleum, and pyrethrnm, 

 the modern improved use of which the author introduced; method of action 

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

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

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

 tions, would kill this insect. 



