174 
[October 
with the tibise much longer than the femora; the other legs feeble but 
long. The 9 remains in the snbimago state?— P. virgo. P. puella. 
P. alba. P. alhifilans (Para.) P. umhrata (Amazon.) P. latipennia 
Walker, (Para.) 
3. Differt. Intermediate seta % (Is it so in 9 ?) very long; I am 
unacquainted with the exterior setae. Anterior legs feeble, long, and 
with the tibia longer than the femur. Eyes % almost contiguous.— 
P. spec. nov. (Rio Janeiro.) An P. Hecuha Hagen? 
4. Differt. Eyes % widely separated. Setae long; intermediate 
seta % 9 very rudimentary. Legs equally robust and long; anterior 
legs % scarcely longer, with their femora and, tibiae equal in length.— 
P. dorsigera Hagen, (Buenos Ayres.) Two new species from Mexico. 
5. 6, 7. Mr. Walsh’s groups A B and 0. In the groups 1—3 the 
membrane of the wings is more delicate, being always folded up in the 
dead specimen. 
The 7th group, Mr. Walsh’s subgenus C, is most widely separated 
from the rest, and is apparently a well defined genus. We must retain 
for the first group the name of Palingenia. The second group is doubt¬ 
less a very good genus. As to the 4th group we may perhaps unite 
it with the 6th, Mr. Walsh’s subgenus B. The 5th group I do not 
know. 
My revision of the N. A. Ephemerina in the Synopsis is not as com¬ 
plete as I could wish, for it was impossible for me accurately to re¬ 
examine the Ephemerina of the British Museum in 1861, because I 
had not my own types with me as in 1857. P. viridescens Walker, is 
probably P.^hilineata Say, Walsh, subim. 9 , but larger (exp. 51 mill.) 
and of the color of my 9 subimago from Ohio, referred to below.— P. 
occulta Walker is probably P. hilineata Say, imago.— P. bicolor is a 9 
subimago of the same group, perhaps of P. limbata Pictet. 
Of groups 5 and 6 the species are— 
1. P. viTTiGERA Walsh. I do not know this species, which is ap¬ 
parently a very interesting one. [iS'ee note 16.] 
2. P. BILINEATA Say, Walsh. (7^. limbata Hagen.)— P. limbata 
Gruerin, Ramb. 9 imago. (Rambur’s description is word for word that 
of Gruerin.)— Bsetis a.ngidata Walker, S imago.— P. viridescens Walker, 
9 subimago.— S imago (very large, length 18 mill. Exp. 38 mill. 
Seta 60 ! mill. Ant. leg 16 mill.) S % subimago and 9 subimago 
