Experiment Station Record, Volume 92, January-June, 1945 Page: 86
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86 EXPERIMENT STATION RECORD [Vol. 92
The genus Melecta in eastern North America and Porto Rico (Hymenoptera:
Anthophoridae), E. G. LINSLEY. (Uniy. Calif.). (Jour. N. Y. Ent. Soc., 51
(1943), No. 3, pp. 225-227).-Hitherto unknown east of the Mississippi River, one
new species of this bee is described from Georgia, one is redescribed from Puerto
Rico, and the easternmost record for M. californica Cresson on the bank of
the Mississippi River is noted.
The causes of the occasional abundance or scarcity of wasps (Vespula spp.)
(Hym.: Vespidae), B. P. BEIRNE (Ent. Mo. Mag., 4. ser., 5 (1944), No. 54, pp.
121-124, illus. 2).-During 1864-1931 there are said to have been 10 seasons when
wasps were abnormally abundant throughout England and Wales in the summer
and fall and 10 when they were abnormally scarce. Their abundance appeared to
occur irrespective of the numbers of queens in the spring. In seasons of
abundance the rainfall during April-June was low, whereas in seasons of scarcity
it was high. Seasons of abundance and scarcity usually appeared in pairs. It is
believed possible that in seasons of wasp scarcity, disease, which often destroys
a large proportion of the larvae, becomes correspondingly scarce, and as it does
not increase at the same rate as the wasps the latter become relatively abundant
in the following year, whereas in seasons of wasp scarcity the reverse takes
Diapause in the parasitic Hymenoptera, S. E. FLANDERS. (Calif. Citrus Expt.
Sta.). (Jour. Econ. Ent., 37 (1944), No. 3, pp. 408-411).-If the development of
an introduced species includes a diapause not synchronized with that of its host
its establishment obviously may be impossible. The necessary synchronization of
development between such a host and its parasite may possibly be brought about
either by artificially prolonging the diapause in one or the other, or by manipulation
of the environal conditions that initiate or break the diapause. Since the
diapause may affect the utilization of hymenopterous parasites, the author has
deemed it advisable to review and correlate the various arrests of development
known to occur in this group in order to facilitate future studies of the phenomenon.
Insect problems of field-crop seed production in the West, C. J. SORENSON.
(Utah Expt. Sta.). (Jour. Econ. Ent., 37 (1944), No. 3, pp. 371-376).-The
leading field crops grown for seed in the western United States are alfalfa, clovers,
vetch, corn, wheat, barley, oats, sugar beets, and cotton. Major insect problems
encountered in growing the seed of these crops are the following: Alfalfa and
clover-Lygus bugs, the seed chalcid, grasshoppers, superb plant bug, alfalfa plant
bug, the Say stinkbug, alfalfa weevil, thrips, clover seed midge, and clover aphid;
vetch-the vetch bruchid, pea aphid, pea moth, and the sitona weevil; corn-the
corn earworm, corn rootworm, European corn borer, chinch bug, grasshoppers,
aphids, and spider mites; small grains-grasshoppers, chinch bug, hessian fly,
strawworms, jointworms, the pale western cutworm, and the Say stinkbug; sugar
beets-Lygus bugs, beet leafhopper, pentatomids, thrips, and false chinch bug;
cotton-Lygus bugs, western cotton plant bug, and pentatomid bugs; and grain
sorghum-southwestern corn borer, the lesser cornstalk borer, and aphids. Problems
presenting the greatest difficulty and on which additional investigations are
most urgently needed are the prevention or control of Lygus bugs, thrips, and the
Say stinkbug in seed alfalfa, the seed chalcid in alfalfa and clover seed, and the
false chinch bug when it attacks any crop. More information is also needed on
the relationships of thrips to alfalfa seed development and of bees-both honeybees
and wild bees-to tripping and pollination in alfalfa.
Insects affecting vegetable seed crops in the Western States, L. G. SMITH.
(Wash. State Col.). (Jour. Econ. Ent., 37 (1944), No. 3, pp. 362-370).-Some
78 insect species are said to affect the production of 21 vegetable seed crops grown
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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 D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/99/: accessed March 29, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.