on the Ephemeride. 131 
2. ®Pallidior. horace flavescens. Nervi alarum 
costas et apices versus nigricantes.” (Walsh.) 
_ Long. corp. ¢ 4-5°5, 9 5-7; set. ¢ 13-14, subim. 
circa 5; set. 2 8-12; exp.al. ¢ 13-15, @ 15-16 mm. 
Hab.—Rock Island, Illinois (Walsh). 
At this point is resumed the series of genera which 
have a short ventral lamina, produced from the tip of 
the penultimate segment of the female; which series 
comprises Leptophlebia, Ephemerella, Betisca, Isonychia, 
Coloburus and Heptagenia.* 
* Species generis incerti. 
The following Cingalese species have been classed in Cloe by Dr. Hagen; 
but most likely a new genus will have to be erected for them. I have seen 
only one female subimago of what I suppose to be C. tristis, Hag.; and 
therefore I am not in a position to describe the genus. This female has 
hind-wings unconformable to those of Baetis, and a ventral plate produced 
from the apex of the penultimate segment; but no egg-valve. According 
to Dr. Hagen, the male has three long sete. The name Cloe cannot be 
retained for them. Some of them may belong to Leptophlebia. 
Sectio I. Ale quatuor. 
No. 1. 
Cloe tristis, Hag. 1858. 
Subimago 2, 8.8. ‘Nigra, pedibus Iuteis, femoribus anticis nigris ; 
setis griseis, incisuris nigris; alis nigris, opacis.” 
Long. set. 9 subim. 15, exp. al. 13 mm. 
Hab.—Rainbodde. (Hag.) 
tristis. 
No. 2. consueta. 
Cloe consueta, Hag. 1858. 
Subimago. ‘ Alis paulo griseis opacis.” 
Imago. “ Capite nigro, thorace brunneo, pedibus pallidis, abdomine pal- 
lido, apicibus segmentorum anguste brunneo marginatis, setis pallidis 
incisuris basalibus nigris ; alis vitreis (hyalinis), venis pallidis; 9 (?) tho- 
race medio luteo, abdomine brunneo.”’ 
Long. set. 2 10, exp. al. 12 mm. 
Hab.—Rainbodde. (Hag.) 
No. 3. solida, 
Cloe solida, Hag. 1858. 
Subimago (?). “Alis griseis opacis, thorace abdomineque Iuteis.” 
Imago 9. ‘ Fusco-enea, abdomine subtus pallido, pedibus luteis, setis 
eriseis incisuris nigris, alis vitrinis.” 
Long. set. 7, exp. al. 10 mm. 
Hab.—Rainbodde. (Hag.) 
