352 The American Naturalist. re 
‘Curtice, C—The animal parasites of sheep. Washin 
1890.— Trichodectes limbatus T. climax, T. spherocephalus. I 
SmitH, J. B. Some questions relating to Aphididæ. Insect a 
Life, E; p. 226, 1891. ae 
Forses, S. A.—A summary history of the corn root Aptis ne 
Insect Life, H1., p. 233, 1891. . 
Riley, C. V.—The flutes scale (/cerya purchasi). Rep. Dep. a 
Agr., 1888, p. 80, 1889. 
The hop plant louse; Z. c., p. 93, 1889. a 
Atwoop, W. B.—Report on experiments with remedii against 
the hop louse; /.c., p. 102, 1889. $ 
SCHWARTZ, E. A.—Notes on Cicada septendecim in 1889. Trans. ae 
Ent. Soc. Washington, I., p. 230, 1890. ae 
Van Duzez, E. P.—New California Homoptera. Entom. Amt : 
VI., pp. 35, 49, 77, 91, 1890.—Pediopsis nubila (Uhler Mts), 
Agallia oculata, Thamnotettix subenea, Th. coguilletii, Th. gem — 
inata, Th. flavocapitata, Th. atropuncta, Th. limbata, A 
inscriptus, Platymetopus elegans, Deltocephalus coguilletti, D. 
minutus, a 
Smiru, E. F.—The black peach Aphis; Z c., pp. 101, 201— P 
Aphis persica-niger nov. (Mich. to Va.) L 
THYSANOPTERA. 
Garman, H.—The mouth parts of the Thysanoptera. Ball a 
Essex Inst., XXII., p. 24, 1890. 
An asymmetry of the head and mouth parts of te 
Thysanoptera. Can. Ent., XXII., p. 215,1890. ; 
HYMENOPTERA. 
* AsnmEAD, W. H.—On the Hymenoptera of Colorado. 
Colorado Biol. Assoc., No. 1, 1890, pp. 47. 
Howarp, L. O.—Two. spider-egg parasites. /msect Lift, - 
269, 1890.—Acoloides (n.g.) saitidis, and Baus amene a 
Insect Life, IL, p. 359. 
Rutey, C. V., and Howarp, L. O.—The wheat saw-fly. 
Life, 11., 286, 1890,—Note on and figure of Cephus HEMET 
