4;J2 On a new Tiicliocera//-o>» Siberia. 



in coloration from the common European specie?, is yet 

 strikingly distinct in its genital characters. It may be nainrd 



Trichocera sihirica, sp. n. 



Colour almost uniform dark brownish. Wings slightly 

 infuscated,a very faint cloud over the r-m cross-vein. First 

 flagellar joint of antennpe about six times as long .-ts 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 : Rj+s slightly shorter than the basal 

 section of W^ ; otherwise as i'n T. rer/eladonis. 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 

 lon<r hairs close together at the tip. Adminiculum small, 

 endinf fn two jjoints ; parameres not evident (the points on 

 the body of the adminiculum may reprt sent fused parameres). 



Siberia: Versehininsk, Yenisei Kiver, 69° 5' N. Type 

 male (unifiue) 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, anil most of them have also a pair 

 of long curved parameres to the adminiculum. Tlie venation 

 of the new species is the same as in 7'. f'uscata, Mg., as 

 determined bv Verrall. 



