THE FAUNA OF SOUTH WESTERN AUSTRALIA. 67 
The larvae in the collection are determined only as far as to the 
genus or even not so far. 
The Ephemeridae in the collection do not represent many 
new species, but the material is of interest, as it enables the 
author to give complete descriptions of some incompletely known 
species. 
The list and the descriptions of the Western Australian 
species are preceded by a list of all species known from Australia, 
but, in this report, only the one species of Trichoptera previously 
known from Western Australia, Plectrotarsus gravenhorsti, Kolen 
ati, need be mentioned. 
TRICHOPTERA. 
Family LEPTOCERIDAE. 
Triplectides delicalula , n. sp.— Lion Mill, Serpentine, Brunswick. 
,, ft.ava, n. sp. — Wooroloo, Serpentine. 
Notanatolica magna, Walker. — Monger's Lake, near Subiaco. 
Larvae: — Triplectides (?) sp. — \algoo. 
gen. (?) sp. (?). — Serpentine River, 
gen. (?) sp. (?). — Brunswick. 
Oecetis sp. -Yalgoo. 
Family HYDROPSYCH 1 DAE. 
Smicridea australis, n. sp.- -Jarrahdale. 
Family PHILOPOTAMIDAE. 
Dolophiliis michaelseni, n. sp. (Imago and Larva). Brunswick. 
Family HYDROPTI LIDAE. 
Larva : — Hydroplila (?) sp. — Lion Mill. 
EPHEMERIDAE. 
Atalophlebia furcifera, Eaton. — Serpentine. 
„ inconspicua, Eaton.- Lion Mill, Brunswick. 
Baelis soror, n. sp. — Serpentine. 
Nymphae -.—Atalophlebia sp.— Lion Mill, Serpentine, Brunswick. 
sp. — Jarrahdale, Serpentine. 
VOLUME II, Part 4. THYSANURA. 
By F. Silvestri (Portici). 
Pp. .47-68, with Plates I-X. 
The collection contains 16 species, of which 12 are new. 
This great number of new species is due to the fact that not 
one species was previously known front South-Western Australia, 
and that from the whole continent only two species ( Acrotelsa 
producta, Esch., and Machilis froggatti, Silv.) were known. 
