Insect light traps have been operated at the Archbold Biological Station, Highlands County, Florida for seven winters from 1959 to and including 1965. Generally the traps were operated every night. This was especially true of 1960 and 1965. In all cases the traps were run at least 85%G of the nights. Fifty-three species of Scarabaeidae have been taken in these light traps. Forty-seven were listed by Frost (1964). Only nine species can be considered common: Dyscinetus morator Fabricius, Phyllophagat elizoria Saylor, P. glaberrima Blanchard, P. prununculina Burmeister, Cyclocephala parallela Casey, Diplotaxis bidentata Leconte, Anomala nigropicta Casey, Se}rica errans Blatchley, and Bothlynus neglectus Leconte. Species of Aphodius and Ataenius were very common, but it was impossible to identify them at the time they were collected. Dyscinetus morator (Fab.)2 was a conspicuous visitor to the traps during all seven years but especially so during 1962. This species is somewhat common in the eastern United States from Connecticut to Florida and Texas, but apparently is more common in the southern states. Little is known concerning the life history of this species. It is freely attracted to light and has been found beneath debris, in muck about the margins of streams and lakes, in compost, and near pig pens. It should be noted that a large compost pile and chicken yards were adjacent to the area where the traps were operated and may account for the abundance of these beetles during certain years. Table 1 illustrates the relative abundance of Dyscinetus morator during seven winters. Records are given only for the months of January, February, March, and April. Although traps were operated during November and December of 1958 and 1959, relatively few beetles were taken during these months. In November 1958, 126 specimens were taken, 70 of these on 9 November. The same year 226 specimens were taken during December, 178 of these on 9 and 10 December when the average night temperatures were relatively high, 64 and 65 F. In November 1959, only 15 specimens were taken, and in December the same year only 16 specimens were taken. Counts were not made during April of 1959, 1960, and 1961. It is evident that there is great yearly variation in the activity of these beetles. Fig. 1 shows the abundance of Dyscinetus morator during the winter of 1962. The traps were operated every night from 6 Jan. to 25 Feb., with the exception of 12-13 Jan. From 25 Feb. to 21 March they were discontinued because of the abundance of these beetles, which made it almost impossible to obtain other specimens in good condition. The re-