1895.] Entomology. 943 
President’s address was delivered by Prof. J. B. Smith, after which the 
following papers were read : 
J. M. Aldrich, Moscow, Idaho, Spraying without a pump; M. H, 
Beckwith, Newark, Del., The San José Scale in Delaware; F. H, 
Chittenden, Washington, D. C., Herbivorous Habits of certain Dermes- 
tide ; T. D. A. Cockerell, Las Cruces, N. Mex., On the natural condi- 
tions which affect the distribution and abundance of Coccide; G. C. 
Davis, Agricultural College, Mich., Insects of the season in M ichigan ; 
C. H. Fernald, Amherst, Mass., The Gypsy Moth; C. P. Gillette, Fort 
Collins, Col., How shall we improve our Collections? F. L. Harvey, 
Orono, Me., Article on Smerinthus cerisyi; A. D. Hopkins, Morgan- 
town, W. Va., (1) On the Study of Forest-tree Insects. (2) Some notes 
on observations of the -season; L. O. Howard, Washington, D. C., 
Some shade-tree insects of Springfield and other New England towns; 
J. A. Lintner, Albany, New York, A paper; C. L. Marlatt, Washing- 
ton, D. C., (1)The Elm-leaf Beetle in Washington. (2) Some notes on 
insecticides; J. B. Smith, New Brunswick, N. J., The uses of insect- 
lime; E. B. Southwick, New York City, (1) Economic entomological 
work in the parks of New York City. (2) A city entomologist and 
insecticides; F, M. Webster, Wooster, O., (1) Some interesting facts 
regarding the genus Diabrotica. (2) Importation and repression of 
destructive insects. (3) Insects of the year in Ohio; C. M. Weed, 
Durham, N. H., An important modification of the kerosene sprayer; 
H. E. Weed, Agricultural College, Miss. (1) Experiments with the 
kerosene knapsack sprayer. (2) Bisulphide of Carbon for Crayfish. 
` Prof. C. H. Fernald was elected President for the next year and Mr. 
C. L. Marlatt was re-elected Secretary, Resolutions indorsing the 
work of the Gypsy Moth Commission, and expressing regret at the dis- 
continuance of Insect Life were passed. 
In Section F. perhaps the most interesting entomological papers were 
those.on the mouth parts of insects by Messrs. J. B. Smith and C. L. 
Marlatt.—C. M. W. 
Pigments of Pieridæ.—Mr. F. G. Hopkins publishes’ an abstract 
of a contribution to the study of excretory substances which function 
in ornament. The wing scales of the white Pieridæ are shown to con- 
tain uric acid, which substance bears the same relation to the scale as 
do the pigments in the colored Pieridæ, so that it practically functions 
as a white pigment. The yellow pigment found in the majority of the 
Pieridæ is a derivative of uric acid. The yellow pigment may be arti- 
2 Proc, Royal Soc. lvii, 1895, pp. 5 and 6. 
64 
