Lewis Berner

THE BIOLOGY OF CALLIBAETIS FLORIDANUS BANKS (EPHEMEROPTERA: BAETIDAE)

Collections of nymphs were made by the usual methods; subimagoes were taken from vegetation in the field; and mated females were collected both at a lighted sheet and light traps, but most were obtained from low spider webs at the banks of a pond near Gainesville. Females, caught in the webs, were often found still living, usually with a reddish mass of eggs, already extruded, adhering to their abdomens. The mass was washed into a jar of water and the young hatched immediately on contact with the liquid. To compare field-reared nymphs with those reared in the laboratory, the newly hatched insects were kept in cage,s made from parachute silk fastened to a wire frame; the tops of the cages were covered with clear plastic. At the same time that nymphs were placed in the field cages,

New Species of Florida Mayflies (Ephemeroptera)

During the period 1937-1941, a rather large series of Florida mayflies was collected in the course of a study of the Ephemeroptera of the state. The descriptions of nine new species discovered during the investigation are presented below; several other forms in the collection probably represent new species, but until the male imagos are obtained and associated with them, the descriptions will be withheld. Ordinarily, new species of Ephemeroptera are not named when only the nymphal stage is known; however, the nymphs of Ephemerella which have been named and described in this paper are sufficiently distinctive to warrant such a radical procedure. The genus Choroterpes has not previously been recorded from the southeast; Tricorythodes no closer to Florida than Texas and West Virginia; Habrophlebiodes never before from the southeast, other than in the mountainous areas; and Brachycercus no nearer than the Louisiana-Texas state line. I wish to take this means of expressing my thanks to the many friends who have collected specimens for me. Wherever

The Mayfly Family Leptophlebiidae in the Southeastern United States

The mayfly family Leptophlebiidae is well represented in the Southeast. In this study 8 of these states, Alabama, Florida, Georgia, Louisiana, Mississippi, North and South Carolina, and Tennessee, are included. All species known to occur in the region are discussed, and a new species, Habrophlebiodes celeteria Berner, is described. Male and female imaginal stages of Habrophlebia vibrans Needham, the adult females of Leptophlebia bradleyi Needham, L. intermedia (Traver), and Paraleptophlebia volitans McDunnough, as well as nymphs of H. vibrans and L. bradleyi, are also described.

A New Southeastern Species of Baetisca (Ephemeroptera: Baetiscidae)

There are 11 species in the mayfly genus Baetisca presently known from the United States and of these five have been reported as occurring in the Southeast (Berner, 19,55). We are presenting the description of another new southeastern form and recording the occurrence of an additional one. Although descriptions of new species of mayflies are normally based on the adult, almost always the male, the nymphs of Baetisca are so diverse that this stage provides an easier and more suitable form for differentiation of species. Baetisca becki, new species

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