on the Hphemeride. 91 
Leptophlebia modesta. 
(Genitalia maris, Pl. V. fig. 3, 3a, b.) 
Potamanthus modestus, Hag. 1864. 
Subimago, v.s.s. Alarum anticze murine, postice 
cervine. 
Imago, v.s.s. ¢. Thoracis tergum piceum vel ater- 
rimum. Ale vitrine, venis testaceis vel fuscis ; postice 
vix lacteo tinctee. Pedum antici picei ; posteriores satu- 
rate fusci. Abdomen fusco-piceum. Sete virescenti- 
grisez vel fuliginose, juncturis atris. 
. Processus. ventralis penultimi segmentorum 
bifidus.” (Hag.) 
Long. corp. ¢ 6-7; al. $ 2? 8-9; set. g circa 
10 mm. 
Hab.—Carinthia (Zeller MS.) ; Corsica (Hag.). 
Dr. Hagen’s diagnosis of the subimago seems to suit 
IL. modesta ; but the specimen associated with the types 
of the imago in M. de Selys Longchamps’ collection is 
Baetis Rhodani, 2? subim. 
Genus [— 
—| : 
Imago diptera, cauda triseti ; Leptophlebiw approxime 
affinis. 
[————] inanis. 
Potamanthus inanis ||, Pict. 1848-5. 
Imago, s. s. “Caput nigrum; thorax acute fuscus. 
Alze vitreze, nervis tenuibus, fuscis; vix griseo tincte, 
sed apud costas obscuriores, et ad bases flavescentes. 
Pedes fusci. Abdomen albidum, apice fusco ; segmenta 
pallida, singula maculi magni fusca utrmque. Set 
grisez, nigro-punctate.” Pict.) 
Hab.—Brazil. (Pict.) 
In the Vienna Museum. 
Professor Pictet thought that the forceps had little 
lamellar limbs: but he was not sure that the shape of 
these might not have become changed after death. 
