Hagen.] 292 [January 22, 
7. Baetis spec. 
No. 65. Ephem. (Baetis) luteipennis Say mss. (Say’s determ.). 
Sutton, Mass. Dr. Smith, marked lost by Harris. 
A fragment of a female belonging to a small species on the pin. 
8. Potamanthus nebulosus Walk. Hag. Syn., 52, 3. 
No. 86. Ephemera (Baetis) terminalis Harr. Maine, Randall, 1836. 
No. 35. Ephemera (proper) bispinosa Say Mss. (Say’s determ.). 
Milton, June, 1821 ; April 15, 1825; Maine, Randall, 1836. 
A male subimago from Milton. This species is synonymous with P. 
odonatus Walsh, and I should have believed it to be Eph. cupida 
Say, if Say himself had not otherwise determined the species. 
9. Ephemerella spec. ? 
No. 35. Maine. 
A male subimago in tolerable condition, belonging to a small spe- 
cies; perhaps it is the subimago of E. excrucians Walsh. _ 
10. Heptagenia maculipennis Walsh. 
No. 85. Ephemera tenella. Maine, Randall, 1836. 
A male imago, probably belonging to this species. 
11. Cloe undata Pict. Hag. Syn., 53, 2. 
No. 64. Ephem. (Clocon?) B. deripticostata Say mss. (Say’s 
determ.). Dublin, N. Hampshire, Mr. Leonard ; Candas bales 
1835. 
Two female imagines. C. fluctuans Walsh, is the same species, and 
his C. ferruginea is perhaps the male. 
12. Cloe spec. ? ; 
No. 40. Baetis leuconeura Say mss. (Say’s determ.). Milton, May 
1, 1826. 
There is a fragmentary subimago with the basal part of the wings 
strongly colored in the costal space and beneath. It seems rather 
too large for the unknown subimago of the foregoing species. There 
is also the nympha of a Baetis in the collection. 
There are in Harris’ Catalogue sixteen numbers belonging to this 
family, referring to ten, perhaps twelve species, now represented by 
twenty-two specimens. Most of them are fragments, of five nearly 
nothing but a little bit of the thorax remain. There are no specimens 
of typical value among them. The Ephemerina, always a most 
difficult family for preservation, is nearly the worst presees group 
in Harris’ collection. 
