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Show Noctuidae Collected by Light Trap in Central Utah By E. W. DA VISl and H. E. DORST2 (3) In the summers of 1929 and 1930 a light trap was set up in a sugar-beet field at Richfield, Utah. This trap was operated from the time the beets germinated in the spring until September 10. The purpose was to collect the insects, especially the beet leafhopper Eutettix tenellus (Baker) that would be attracted to light in a sugar-beet field. An attempt was made to get determinations for all species of insects collected. When the noctuids were determined it was found that many species had been collected that had not previously been reported from Utah. The entire list of species collected is given even though some of the species have been reported from Utah before. The trap was emptied each day and the number of specimens of each species was recorded for that day. This gave the dates of first and last catch and the period of greatest abundance. In the majority of cases the numbers gradually increased to a peak and thence de-creased, indicating one peak or brood. However, in six species there were two peaks about 2 months apart, which would possibly indicate two broods. Barnes' and McDunnough's "Check List of the Lepidoptera of Boreal America" has been used for the arrangement of genera and species. The numbers before the species are identical with those given in the check list. The collection record gives the two years the trap was used, The dates indicate the time the first and the last specimens of each species were col lected. The number of specimens collected during the season is given at the right. The approximate peak of the flight is recorded in most cases. The following list contains 70 genera and 166 species represented by - 5,589 specimens. Determinations of these noctuids were made by Dr. W. C. Cook of Modesto, California, and by Dr. J. McDunnough of Ottawa, and Canada, determinations were verified by the late F. H. Benjamin of the Division of Insect Identification, Bureau of the authors are very grateful. Entomology and Plant Quarantine, to whom HELIOITHIS Ochs. 1089 phloxiphaga G. & R. 1929. None. 1930. June 30 to August 27 Peak of flight between August 14 and 18. 1090 obsoleta Fabr. 1929. None. 1930. July 15 to September 9 Peak of flight between July 29 and -----j 1 3 4 specimens. 8 specimens. August 8. Assistant Entomologist and (2) Junior Entomologist, U. S. Department of Agriculture, Bureau of Entomology and Plant Quarantine. The work reported in this .... paper was a part of the sugar- beet insect mvesttgation of the Bureau of Entomology and Plant Quarantine. Dr. P. N. Annand, of Wash ington, D. C., was at that time in charge of the project, and to him the writers are indebted for general supervision. 179 |
