REVUE BIBLIOGRAPHIQUE. 
Путешестве въ Туркестанъ А. П. Федченко. Эоогеографиче- 
свя изслФдоваюя. Чешуекрылыя (Lepidoptera). Обрабо- 
талъ Н. Г. Ершовъ. С.-Петербургъ. Москва. 1874. 4°. 
А. P. Fedtschenko’s Travels in Turkestan. Zoogeographical 
Researches. Lepidoptera described by N. G. Erschoff. 
St. Petersburg and Moscow. 1874. 4°. 
A most interesting record of the Lepidoptera taken in the new 
Russian possessions in Turkestan, being a portion of a work on Tur- 
kestan in preparation under the auspices ‘of the Russian Govern- 
ment, has just been published in a detached form. It has been drawn 
up Бу. М Nicholas Erschoff, Member of the Russian Entomolo- 
gical Society, well known as an indefatigable collector, as possessing 
a magnificent collection of Lepidoptera, Exotic as well as European, 
and as having largely added to the a of the Lepidoptera of 
his own country. 
Thelocality, where the bulk of the Lepidoptera described in this 
work were taken, lies between about 45° and 40° N. Lat. and 31° 
and 41° Е. Long. (60°— 70° from Greenwich), and has hitherto been al- 
most unexplored. Continuing along this belt eastwards one would tra- 
verse Chinese Tartary and Northern China, of which equally little is 
as yet known, and it was therefore natural to expect many important ad- 
ditions to be made to the Russian Fauna. These expectations have been 
amply fulfilled even by the as yet very incomplete researches made 
during the Russian Expedition, and we may hope that, with the probable 
spread of eivilization, the facilities for continuing them may be ma- 
terially increased. 
M: N. Erschoff has had for material for the present work the 
Lepidoptera collected during the expedition by М" Alexis Fedtschenko 
