on the Bphemeride. 25 
Croxon (continued). 
hyalinatum, ! Ste. Ill. vi. 68; hyalinata, Walk. Cat. 579=Centroptilum 
luteolum, 2 im. 
litura, Pict., in Cloe; Walk. Cat. 574=Centroptilwmn. 
marmoratum, Curt. Phil. Mag. 1834, p. 121l=dipterwm, 2 im. 
melanonyx, Pict., in Cloe; Walk. Cat. 574=Baetis. 
mendaw, Walsh ; in Cloe (C), Walsh. 
obscurum, Curt. Phil. Mag. 1834, p. 12l=dipterum, subim. 
|| obscurwm, ! Ramb.; in Cloe, Ramb.; 2 subim. 
ochracewm,! Ste. Ill. vi. 68; ochracea, Walk. Cat. 578=Centroptilum 
luteolum, 2 im. 
pallida, Leach, HE. Enc. ix. 187; Sam. E. Comp. 259=dipterum. 
posticata, Say, W. Q. R. ii. 162; Le Conte, repr. i. 172=Baetis, g im. 
pumila, Burm., in Cloe; Walk. Cat. 573= Baetis. 
t pumilum, Hag. Brit. Syn. 33; ! Etn. An. & Mag. Nat. Hist. 1866, p. 147 
= Baetis binoculatus. 
Rhodani, Pict., in Cloe; Walk. Cat. 573; Hag. Brit. Syn. 31; ! Etn. An. 
& Mag. Nat. Hist. 1866, p. 147=Baetis. 
russulum, Miil.; in Ephemera, Mil. 
simile, ! Etn. Trans. Ent. Soc. 1870, p. 2. 
striata, Lin., in Ephemera; Walk. Cat. 576= Baetis pumilus ? 
subinfuscatum, ! Ramb.; in Cloe, Ramb.; ? subim. 
translucida, Pict., in Cloe; Walk. Cat. 574=Centroptilum luteolum. 
undata, Pict., in Cloe; Walk. Cat. 575=Baetis. 
unicolore, Curt. Phil. Mag. 1834, p.121; ! Ste. Ill. vi. 69; wnicolor, Walk. 
Cat. 579=sp. anceps. 
verna, Curt. Phil. Mag. 1834, p. 1217 ! Ste. Ill. vi. 69; ! Walk. Cat. 578= 
Baetis pheops, g im. 
vicinum, Hag.; in Cloe, Hag. 
virgo, ! Ste. Ill. vi. 70; Walk. Cat. 580=dipterum, g im. 
vitripennis, Blanch. ; in Ephemera (Cloe), Blanch. 
Cuoxorsis, Etn. (1866) =Cloeon, Leach. 
diptera, Kin. An. & Mag. Nat. Hist. 1866, p. 146=Cloeon dipterwm. 
diptera, var., Ktn. op. cit. 1867, p. 401=Cloeon russulum. 
XXIV. Coxozurvs, Etn. (1868); in Palingenia, Walk. Typ. C. hume- 
ralis. 
haleuticus, ! nov. sp., ¢ im. 
humeralis, ! Walk. ; in Palingenia, Walk. 
XXY. Cronicus, nov. gen. 
anomalus, Pict. ; in Baetis, Pict. 
Ecpyurvs, Etn. (1868); [mis-spelt Hedyonwrus] = Heptagenia. 
venosus, Fab., in Ephemera, Fab.; Htn. Trans. Ent. Soc. 1868, p, 141, n. 
X. Epuemera, Lin. 1735; Sam. 1819; Pict. 1843-5; Hag.; Brau.; 
Walsh; Houghton, 1865; Etn. = Ephemera, Lin. c. 
3-set. p. Typ. E. vulgata. 
