Experiment Station Record, Volume 92, January-June, 1945 Page: 83
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1945] ECONOMIC ZOOLOGY--ENTOMOLOGY 83
pyrethrin spray more effective. Four such adjuvants or activators were tested on
the yellow-fever mosquito, with the conclusions that they delay the occurrence of
"knock-down" and so prolong the period of flight through the mist, the insect picks
up its dose of insecticide by impaction with the spray droplets during its flight, the
rate of movement of the insect in relation to the droplet and the relative momenta
are important factors in the results, and the activators used have a very marked
effect on the particle size and persistence of the insecticidal test. The effectiveness
of activating insecticidal sprays by the method outlined is illustrated by detailed
results from the use of isobutyldecylenamide.
Action of inert dusts on insects, V. B. WIGGLESWORTH (Nature [London], 153
(1944), No. 3886, pp. 493-494, illus. 2).-From observations, mainly orn the bug
Rhodnius but confirmed with other insects, it appeared that an important factor in
the action of dusts is simple abrasion of a film of wax which lies outside the epicuticle,
thus allowing the desiccation of the insect. It has also often been noted that
certain dusts favor the action of insecticides; perhaps this is owing to their abrasive
or adsorptive properties. It may therefore be desirable deliberately to incorporate
abrasive material as an adjuvant in insecticidal dusts.
Action of inert dusts on insects, H. KALMUS (Nature [London], 153 (1944),
No. 3893, pp. 714-715).-A note on experiments which appear to confirm the
results reported by Wigglesworth (see preceding entry).
Anthropomorphism in insect psychology, P. RAU (Ann. Ent. Soc. Amer., 37
(1944), No. 2, pp. 201-206).-A plea for sanity in the approach and in the use of
language in this field of study.
Group motor responses of adult and larval forms of insects to different wavelengths
of light, H. B. WEISS, E. E. McCoY, JR., and W. M. BOYD (Jour. N. Y.
Ent. Soc., 52 (1944), No. 1, pp. 27-43, illus. 5).-This paper, the fifth of a series
(E. S. R., 89, p. 337), reports on the responses of 7 species of beetles and of
16 species of lepidopterous, hymenopterous, and coleopterous larvae to 10i wavelength
bands of light of equal physical intensities, in disarray, from 3,650 to
7,400 a. u.. The tests were run in a sector type equipment described in the third
and fourth papers of the series.
The external morphology of the oblong-winged katydid Amblycorypha
oblongifolia (DeGeer) (Orthoptera: Tettigoniidae), S. KRAMER. (Mass. State
Col.). (Ann. Ent. Soc. Amer., 37 (1944), No. 2, pp. 167-192, illus. 26).
A study of a gynandromorph of Melanoplus mexicanus mexicanus (Sauss.)
(Orthoptera), H. C. SEVERIN. (S. Dak. Expt. Sta.). (Jour. N. Y. Ent. Soc., 51
(1943), No. 3, pp. 179-182, illus. 1).
Colour changes in Mantis religiosa L., H. G. JAMES (Canad. Ent., 76 (1944),
No. 6, pp. 113-116).-All the data considered from the literature and the experiments
described seem to indicate that the color of the mantids in the field is
closely related to that of the plant cover. Tests with colored boxes supported
the hypothesis that the color of the substratum and the quality of its reflected
light are the factors influencing and determining the color phases of the mrntids.
New muscoid Diptera from the United States, H. J. REINHARD. (Tex. Expt.
Sta.). (Jour. Kans. Ent. Soc., 17 (1944), No. 2, pp. 57-72).-Most of the new
forms described were encountered in a study of some recent additions of
Tachinidae to the Snow Entomological Collections, University of Kansas.
Notes on the parasitic habits of Muscina stabulans (Fall.) (Diptera: Muscidae),
A. F. SATTERTHWAIT. (U. S. D. A.). (Jour. N. Y. Ent. Soc., 51 (1943),
No. 3, pp. 233-234).
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington. (digital.library.unt.edu/ark:/67531/metadc5064/m1/96/: accessed February 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.