on the Ephemeride. 35 
HEPrTacEenta (continued). 
volitans, | Etn. Trans. Ent. Soc. 1870, p. 7, ¢ im. 
zebrata, ! Hag.; in Baetis, Hag. 
VIII. Hexacknra, Walsh (1863); in Ephemera, Web.; Baetis, Say ; 
Palingenia, Pict. 
albivitta, | Walk.; in Baetis, Walk. 
? atrostoma, Web.; in Ephemera, Web. 
bilineata, Say; in Baetis, Say; Palingenia, Walsh, 1862. 
decolorata, Hag.; in Palingenia, Hag. 
limbata, ! Guer.; in Ephemera, Guer.; Palingenia, Pict. 
XXIII. Isonycuta, nov. gen. Typ. I. manca. 
manca, | NOY. sp. 
ignota, ! Walk.; in Baetis, Walk. 
II. Lacunanz, Hag. (1868). Typ. L. abnormis. 
abnornmis, Hag. Proc. Bost. Soc. Nat. Hist. 1868, p. 372-4, fig.; 9 im. 
XII. Lepropuirst1s, Westw. (1840); in Ephemera, Reaumur; Baetis, 
Ste.; Potamanthus, Pict.; Palingenia, Walk. 
anmulata, ! Hag.; in Potamanthus, Hag. 
auriculata, ! nov. sp.; ¢ im. 
australasica, Pict.; in Baetis, Pict. 
australis, ! Walk.; in Ephemera, Walk. 
castanea, Pict.; in Potamanthus, Pict. 
cincta, Retz. ; in Ephemera, Retz. 
Colombice, ! Walk.; in Ephemera, Walk.; Palingenia, Hag. 
costalis, Burm.; in Baetis, Burm. 
cupida, Say; in Ephemera, Say ; Potamanthus, Hag. 
dentata, ! nov. sp.; ¢ im. 
dislocams, ! Walk.; in Ephemera, Walk. 
femoralis, Hag.; in Potamanthus, Hag. 
fusca, Curt.; in Ephemera, Curt.; Potamanthus, Pict. 
furcifera, ! noy. sp.; g¢ im. 
helwipes, ! Ste.; in Ephemera, Ste. 
tmconspicua, |! noy. sp.; ¢ im. 
Krueperi, Stein; in Potamanthus, Stein. 
marginata, Lin.; in Ephemera, Lin.; Potamanthus, Hag. 
modesta, | Hag.; in Potamanthus, Hag. 
mollis, ! Hag.; in Cloe, Hag. [not described]. 
nebulosa, ! Walk.; in Palingenia, Walk. 
nodularis,! nov. sp.; go im. 
Picteti, Etn.; for Potamanthus } marginatus, Pict. 
prisca, Pict.; in Potamanthus, Hag. & Pict. 
scita, ! Walk. ; in Baetis, Walk. 
strigata, ! nov. sp.; 9 im. 
TRANS. ENT. soc. 1871.—ParTI. (MARCH.) D 
