Table Of Content

PROC. ENTOMOL. SOC. WASH. 108(1), 2006, p. 248 NOTE Rediscovery of Fallceon eatoni (Kimmins) (Ephemeroptera: Baetidae) Certain adult small minnow mayflies W. K. Reeves, deposited in the Purdue En- (Baetidae) from the 19 Century Godman tomological Research Collection). The re- and Salvin collections made in Mexico and discovery of this species is significant in Central America (now residing in the Brit- that it not only establishes the species9 con- ish Museum) were one of three species re- tinued existence, but it provides first USA ported by Eaton (1892) as new but un- and Arizona records. Because of possible named species of Baetis Leach. This small low numbers of populations and restricted series from northern Sonora was restudied distribution, it may be considered a species by Kimmins (1934) and described as B. ea- of environmental concern. toni Kimmins. Waltz and McCafferty LITERATURE CITED (1987) recombined this species with the ge- nus Fallceon Waltz and McCafferty based Eaton, A. E. 1982. Biologia Centrali-Americana: In- secta, Ephemeridae. Vol. 38. Bernard Quaritch, on its distinctive male genitalia. Although London. the F. eatoni had later been deemed syn- Kimmins, D. E. 1934. Notes on the Ephemeroptera of onymous with the ubiquitous F. quilleri the Godman and Salvin Collection, with descrip- (Dodds) (McCafferty and Waltz 1991), my tions of two new species. Annals and Magazine of Natural History (10) 14: 338-353. subsequent examination of type material McCafferty, W. P. and C. R. Lugo-Ortiz. 1994. Taxo- showed that the hindwing costal process nomic status of three species of Fallceon (Ephem- was not hooked as in F. quilleri, and that eropta: Baetidae). Entomological News 105: 1614 the terminal segment of the genital forceps 163. was more developed than in the latter spe- McCafferty, W. P. and R. D. Waltz. 1991. Revisionary synopsis of the Baetidae (Ephemeroptera) of cies. Thus, F. eatoni was revalidated North and Midddle America. Transactions of the (McCafferty and Lugo-Ortiz 1994), but it9s American Entomological Society 116: 769-799. continued existence has been questionable Waltz, R. D. and W. P. McCafferty. 1987. New genera because it has not been known since its of Baetidae from some Nearctic species previous- ly included in Baetis Leach (Ephemeroptera). An- original collection well over 100 years ago. nals of the Entomological Society of America 80: Among unidentified materials from Salt 667-680. River Canyon in Arizona that were recently collected and donated by Will Reeves (At- W. P. McCafferty, Department of Ento- lanta), | found a single specimen of Baeti- mology, Purdue University, West Lafayette, dae that proved to be F. eatoni (Arizona, IN 47907, U.S.A. (e-mail: meccaffer@ Gila Co., Salt River Canyon, IV-18-2005, purdue.edu)