1873.] 289 [Hagen. 
femur and tibia outside and inside brown ; set stout, black; abdo- 
men brown, apical border of the sezments yellow; the apex beneath 
brighter yellow, the antepenultimate ventral segment prolonged 
in the middle into a lobe, reaching nearly the tip of the fol- 
lowing segment; the lobe beneath with a somewhat deeply im- 
pressed median furrow; forewing twenty mm. in length. I know no 
other specimen. ‘This species is very near to P. flavescens Walsh, but 
a little larger, and the lobe in P. flavescens female is described as semi- 
circular, and to cover one half of the next segment. FT have only one 
female of P. flavescens before me, agreeing with Walsh’s description. 
The specimen in Harris’ collection is nearly related to P. flavescens. 
5. Perla fulvovittata Say. mss. (Say’s determ.). 
No. 62. Pennsylvania, Mr. Nuttall; another specimen from Maine, 
1831, Randall, is wanting. Only fragments of two wings are pre- 
served. ‘The species is related to P. varians Walsh, perhaps identi- 
cal. , 
6. Perla semifasciata ? Say $ uncertain. (Say’s determ.) 
No. 30. Milton, palings, Aug. 1, 1821. 
Only fragments of the wings belonging to a smaller species of Perla ; 
perhaps the specimen stated as different and numbered 24, belongs 
here. ; 
7. Chloroperla brunneipennis ? Walsh. 
No. 30.? North Carolina, June. 
There are fragments of a female belonging, perhaps, to this spe- 
cies. 
8. Perla vitticollis Harris. 
No. 119. Maine, Randall, 1836. 
A fragment of male and a female ; the species is related to P. 
decipiens, Walsh. 
9. Chloroperla bilineata Say. 
No. 120. Sialis bilineata Say, Maine, 1836, Randall. 
Only fragments of wings; perhaps belonging to Say’s species. 
10. Isopteryx Cydippe Newm. Hag. Syn., 30, 1. di 
No. 120. One specimen from Maine, Randall, 1836 ; another from 
New Hampshire, Leonard, in bad condition, probably belong to this 
species. 
There is a later addition with a red label, No. 113, not marked in 
the catalogue, a small immature species of Perla. 
11. Taeniopteryx maura Pict. Hag. Syn., 35, 4. _ 
No. 31. Nemoura convoluta Say Mss., (Say’s determ.) Taeniop- 
PROCEEDINGS B.S.N. H.—VOL. XV. 19 APRIL, 1878. 
