148 
Psyche 
[December 
wide, lipped, transverse band caudally. The ventral lip 
partially covers the more dorsal band which is sometimes 
strongly folded along its caudal edge. Ductus bursae 
rather long, narrow, and even in width. It is sclerotized 
throughout most of its length. Bursa copulatrix elongate, 
and bearing two signa. Ovipositor lobes narrow and some- 
what pointed terminally. 
Life History 
The life histories of most of the North American species 
are known, but I can find none recorded for the Palearctic 
species. Because of this I defer inclusion of life history 
notes in my generic description until this information be- 
comes available. Descriptions of the early stages of the 
eastern North American species are available in Klots 
(1951), and further references may be found in Hy. 
Edwards (1889), Davenport and Dethier (1938), and 
Dethier (1946). The foodplants of the larvae are varied, 
including conifers ( Picea , Juniperus etc.) and flowering 
plants ( Kalrnia , Arctostaphylos, Vaccinium, Prunus etc.). 
Distribution 
In North America this genus ranges from east to west 
coasts. It is found well north into Canada, whence it 
ranges south to Florida, Texas, and southern California. 
In Asia it is found from Siberia, the Amur basin, and 
Japan south through China to the Khasia Hills of Assam. 
It ranges westward to the Altai Mountains, and its Asiatic 
metropolis is central and western China, where the greatest 
number of species occur. 
Synonymy 
Prior to the beginning of this century, a large majority 
of the “hairstreaks” were assigned by most authors to the 
catchall genus Thecla, even though a number of other 
generic names were available. In many places, such as 
South America, this is still the case, and it is only in the 
last fifty years that some attempt has been made to break 
the hairstreaks up into more natural groupings. Hiibner 
included Incisalia niphon (Hiibner) in his genera Lycus 
