94 Annals Entomological Society of America [Vol. IV, 



the rearing of nymphs but by their descriptive work they laid 

 the foundation for the life-history studies which have fol- 

 lowed. Berryf '03 reared and described the nymphs of Habro- 

 phlebia americana Banks, (which nymph is not a Habrophlebia 

 but a typical Leptophlebia), Blasturus cupidus Say, and Calli- 

 baetis ferruginea Walsh. A note on the nymphs of the genus 

 Tricorythus was published by Cockerell and Gill '06|. The 

 largest number of life-histories of Eastern North American 

 forms has been written by Professor James G. Needham in 

 Bulletins 47, 68, and 86 of the New York State Museum, and 

 includes the following species: 



Bull. 47. Bull. 86. 



Heptagenia pulchella Walsh. Chirotonetes albomanicatus Needham- 



Baetis pygmea Hagen. Ameletus ludens Needham. 



Siphlurus alternatus Say. Choroterpes basalis Banks. 



Caenis diminuta Walker. Baetis pygmea Hagen. 



Hexagenia variabilis Eaton. Callibaetis skokiana Needham. 



Ephemera varia Eaton. Ephemerclla bispina Needham. 



Bull. 124. Caenis allecta Needham. 



Ephemerella dorothea Needham. Leptophlebia praepedita Eaton. 



Potamanthus diaphanus Needham. Heptagenia interpunctata Say. 



Eedyurus maculipennis Walsh. 



By Mr. W. E. Howard. 

 Polymitarcys albus Say. 



With the exception of Callibaetis skokiana, Ephemerella 

 bispina, Ephemerella dorothea, and Potamanthus diaphanus, 

 all of these species have been taken in or near Fall Creek. 

 For some of these further biological data have been secured. 

 In addition to them eight species have been bred which it is 

 believed have not been before recorded. These are all from 

 Fall Creek with the exception of one, Ephemerella cornuta, 

 reared for me by Miss Lucy W. Smith at Salisbury, Connecticut, 

 and here included in the Ephemerella group. The life-histories 

 which are given are those of Iron fragilis, sp. now, Epeorus 

 humeralis, sp. nov., Ephemerella rotunda, sp. nov., E. tuber- 

 culata, sp. nov., E. cornuta, sp. nov., E. deficiens, sp. nov., 

 E. plumosa, sp. nov., and E. spinosa, sp. nov. The descrip- 

 tion of the female imago has been added to Prof. Needham' s 

 life-history of Ameletus ludens, and the Caenis allecta which he 

 placed provisionally in that genus has on rearing been estab- 

 lished in Tricorythus. 



f Berry, Edward. New or Hitherto Unknown Ephemerid Nymphs of the 

 Eastern U. S. Am. Natural. Vol. XXXVII, pp. 25-31. 1903. 



t Cockerell, T. D. A., and Marie Gill. Tricorythus, a Genus of Mav-flies. 

 Univ. of Colo. Studies, Vol. III. No. 3, 1906. 



