PSOClDiE — EPHEMERIDiE. 
Ins. 205 
P HOCUS canadensis and trifasciatus^ spp. nn., Provancher, Nat. Canad. 
viii. p. 186, Quebec. 
Perlid^. 
Capnia pygmcea appearing in enormous numbers on the Riviere du Loup, 
Canada, in March, falling on the snow. Provancher, Nat. Canad. viii. 
p. 125. 
New species : — 
Ptcronarcys rectus, id.. 1. c. p. 189, bicarinatus, p. 190, Jlavicornis, p. 191, 
Quebec. 
Perla quchecensis and hieroghjpliica, id. 1. c. p. 211, marginipes and 
navalis, p. 212, riparia and sulcata, p. 213, naica, p. 214, Quebec. 
Nemura nigrita, id. 1. c. p. 217, Quebec. 
Ephemeridj;. 
JoLY, E. Sur une nouvelle espcce du genre d’Ephdmerines Oligoneuria 
(0. rhenana), par feu le Dr. L. Imholf ; traduit de I’AHernand et 
annote. Bull. Soc. Angers, et 6™® ann(5es, pp. 37-46. 
A translation of Imholf ’s paper published in Verh. Ges. Bas. in 1852, 
with copious notes. 
. Etudes sur I’appareil reproducteur des Ephemerines. C. R. Ixxxiii. 
pp. 809-813. 
Scarcely more than an extract from the paper by N. & E. Joly noticed 
below. 
, N. Les Eph^meres, leur organization, leurs metamorphoses, leurs 
moeurs, et leur Industrie. La Nature, v. pp. 10-15, 43-47. 
A well-written, semi-popular article, illustrated by numerous woodcuts, 
for the most part original. It is more especially elaborated from a study 
of Palingenia virgo, the details concerning the embryology and the con- 
dition of the very young larvse of which are valuable. . As in all works 
by this author (and by his son, E. Joly), there is evidence that he had not 
seen Lubbock’s memoir on the development of Cliloeon. 
. Etudes sur I’embryogenie des Ephemeres, notamment chez la Palin- 
genia virgo. Mcim. Ac. Toulouse (sop. copy), pp. 1-12, pis. i. & ii. ; 
cf. CR. ixxxii. pp. 1030-1034, and Ann. N. H. (4) xvii. pp. 481-484. 
& E. Contributions a I’histoire Naturelle et a I’Anatomie des 
Ephemmnes. Rev. Sci. Nat. v. (Dec., 1876) ; separate, pp. 1-26, 
with four plates. 
A concise summary. Two points may be specially mentioned. The 
authors assert that in Palingenia virgo the. young larva is entirely 
deprived of branchim and respires solely through the skin ; the double 
intromittent organ of the $ has an opening at the extremity of each 
branch ; and there are probably two oviducts in the $ . 
Eaton, P. E. Soc. 1876, p. vii. announces a supplement to his mono- 
