274 



space between, not shorter than either of the stripes themselves, some- 

 times even longer. There is not a black stripe among the nasus and the 

 frons. The vertex Avithout the j^ellow spot among the ,, ocelli". The 

 hinder surface of the head is black, having the small yellow spot 

 beside each eye and the yellow stripe along the under margin of them. 

 The two middle black stipes on the front of thorax generally united 

 the whole length. The humeral and antehumeral black stripes are thick 

 and the green stripe between them is most often narrower than either, 

 or at any rate not wider than the narrower of the two. The lower anal 

 appendage is not shorter than the upper, often even longer, so that 

 viewed from the side the hooked ends of the lower appendage are seen 

 to curl slightly round the end of the upper. The legs are black with 

 yellow stripes on the inside of the first pair of thighs and on the base 

 of the outer side of the 2*^ and 3*^ pairs of thighs. The tibia are all black. 

 The body is dull green. 



Length of the abdomen 42 — 44 mm. 



- - hinder wing 34 — 35 - 



Pterostigma 3,25—3,5 mm. 



The female is unknown. 



17) Gom.phus flavipes var. sibirica var. n., rare in the neighbour- 

 hood of Tomsk; more common south from Tomsk. The specimens of the 

 Gomphus flavipes of Siberia differ from those of Europe in following 

 respects: The black antehumeral stripes of the thorax are more widened 

 in the middle. The black middle and antehumeral stripes are not joined 

 behind or in front. The abdomen is shorter. 



(3(5 ee 



Length of the abdomen 34 — 35 mm. 35 mm. 



- - hinder wing. ... 31— 32 - 34 



Pterostigma 3,5 - 4,5 - 



18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 28 



Calopteryx virgo L., col. by V. Anikin, 1891; 2 ,-^. 



splendens Har. common. 

 Lestes dryas Kirby, less common than the following species. 

 sponsa Hans, common. 

 virens Ch., common. 

 Sympycna hraueri Nob., common. 

 Agrion armatum Ch., common. 

 hastidatuni Ch., common. 

 vernale Hag., less common. 

 Erythromyna najas Hans, common, 

 Platycnemis pennipes Pal., common. 



