271 



wings with 8 antenodals (nervules antécubitales S el y s) and 7 post- 

 nodals (nervules postcubitales S e lys). Triangle (triangle discoïdal 

 Selys) with 1 cross nervure. 



The length of the abdomen 36 mm. 



- - - hinder wing 35 



- maximum of breadth of the hinder wing 11,5 

 Pterostigma 2,5 



The male is unknown. 



5) Somatochlora arctica Zett. (fig. 3). 



1 O: In colour of the body this specimen resembles the Somaf. 

 gratiosa, but the yellow spots on the abdomen (especially the oval spots 

 on the 3'^ segm.) are considerably smaller. The vulvar scale is large, 

 longer than the 9"' segment, a little raised, pipe-shaped, the free termi- 

 nal edge forming a more or less rounded angle. The wings as in the 

 Somat. gmtiosa, but the pterostigma is dark-brown and there are only 

 5 — 6 postnodal nervures. 



The sizes are as in the Somat. gratiosa. 



6) Somatochlora saklbergi Trybom' (?) (fig. 4). 



1 Q : The body is dark-bronze colour. The labium, rhinarium and a 

 triangular spot beside each eye are yellow. The thorax is without 

 yellow spots. The abdomen is all bronze-green, excepting the posterior 

 margin and a small round spot on each side of the 2' tergit, which are 

 yellow. The under part of the abdomen is all black. The abdomen does 

 not narrow in the 3^^ segment. 



The 9'^ and 10*^ are together equal in length to the 8*^. The vul- 

 var scale is yellowish, half the length of the 9*^ segment, a little sharp- 

 ened at the end and raised. The legs are black. The wings transparent. 

 The triangle of both pairs of wings bisected by a nervure. Fore wings 

 with 9 antenodals and 8 postnodals. The pterostigma is yellow brown, 

 darker and straighter than in the case of Somat. gratiosa. The mem- 

 branule is white in front and dark brown behind. 



This female resembles the Somat. alpestris Sel. 



The length of the abdomen .... 31 mm. 



- hind wing 34 



Pterostigma: 2,75 - 



Not being able to obtain the work of M. Trybom I was obliged to 

 limithimself to work of Jakobson and Bianki (OrthopteraandPseudo- 

 neuroptera of Russia, St. P. B. 1902, russian), though the description of 

 this species given in this work is very brief to the point of inadequacy 

 and thus the determination of this specimen remains open to question. 



1 Bib. Svensk. Vetensk. Akad. Handl. XV. 1889. Xo. 4. p. 7. tab. 1. fig. 1. 



