xxiv INTKODUCTION. 
' Schrenck's Reisen und Forschungen im Amur-Lande,' par E. MenetriSs, 
1859. 
" Lepidopteren Ost-Sibiriens," by Bremer. Mem. Acad. Imp. Sci. de 
St. Petersbourg, 1864. 
" On Lepidoptera collected in Japan and Corea by Mr. W. Wykeham Perry," 
by A. G. Butler. Annals and Magazine of Natural History, (5) ix, 
p. 13 (1882). 
" On Lepidoptera from Manchuria and the Corea," by A. G. Butler. Annals 
and Magazine of Natural History, (5) xi. pp. 109-1 17, 278 & 279 (1883). 
And the standard works on European and Palsearctic Rhopalocera. 
In February 1887 1 sent Mr. A. E. Pratt, whom I had previously employed 
to collect Lepidoptera for me in the Lebanon district of Syria, to China for 
the purpose of forming entomological collections throughout the valley of the 
Yang-tze-kiang. 
About the middle of April of the year mentioned he commenced work at 
Kiukiang, which place is situated some 500 miles from the sea. Here he 
was fortunate in finding good accommodation among the Lu-shan hills, 
which lie about nine miles to the south of the town, and he remained in the 
district until August 4th, making extensive collections of Lepidoptera and 
Coleoptera. A list of the former will be found in the ' Transactions of the 
Entomological Society of London' for the year 1889. Ascending the 
Yang-tze he reached Ichang on August 14th. This town is situated on the 
left bank of the river and about 1100 miles from its mouth. On September 
10th he embarked in a house-boat for the San-ya-tung Glen, at the entrance 
of the Ichang Gorge, arriving there the same day. Here he found the 
vegetation very rich and Lepidoptera and Coleoptera fairly plentiful. He 
returned to Ichang early in October. During the winter Mr. Pratt took the 
opportunity of exploring the surrounding country, with the view of discovering 
suitable collecting-stations for the following season ; and on April 16, 1888, 
he left for Chang-yang, a mountainous district a few days' journey to the 
south of Ichang, where he resided for four months, and, assisted by natives, 
made a very fine collection of insects. 
