432 On a new Trichocera from Siberia. 
in coloration from the common European species, is yet 
strikingly distinct in its genital characters. It may be named 
Trichocera sibirica, sp. n. 
Colour almost uniform dark brownish. Wings slightly 
infuscated, a very faint cloud over the r-m cross-vein, First 
flagellar joint of antennze about six times as long as broad, 
somewhat thickened on its basal half ; second and third each, 
about half as long as the first, very slightly thickened in the™ 
middle. Venation: R,,3 slightly shorter than the basal 
section of R,; otherwise as in 7. regelationis. Genitalia: 
ventral junction of side-pieces forming a strong median 
Trichocera sibirica; male genitalia, from beneath. 
process; clasper on its inner side with two strong processes, 
the basal one thumb-like, the apical one conical, two rather 
long hairs close together at the tip. Adminiculum small, 
ending in two points ; parameres not evident (the points on 
the body of the adminiculum may represent fused parameres). 
Siperi1aA: Verschininsk, Yenisei River, 69° 5’ N. Type 
male (unique) in Stockholm Museum. 
All the European species of the genus, as far as I know 
them, have the clasper almost cylindrical, with or without a 
minute process at the base, and most of them have also a pair 
of long curved parameres to the adminiculum. The venation 
of the new species is the same as in 7. fuscata, Mg., as 
determined by Verrall. 
