Some Palaearctic species of Cordulegaster. 279 



Race princeps, nov. 



(J. Frons yellow without black markings ; nasus yellow, rhinarium 

 black ; labrum yellow, basal margin bordered with black ; virgule not 

 marked with black; occiput yellow with yellowish hairs, swollen 

 above and behind, deeply divided behind. Behind the eyes entirely 

 whitish with the exception of a black border running along the upper 

 part of the eyes. 



Pro thorax black, hind margin with a yellow line interrupted in 

 the middle ; anterior margin narrowly yellow. 



Thorax : antehumeral yellow bands preceded by a small yellow sub- 

 triangular marking ; yellow line between lateral bands small, broken 

 up into three short lines all above stigma ; no humeral dot visible. 



Abdomen heavily marked with yellow ; 1st segment black with a 

 narrow yellow lateral hind margin, the yellow increasing towards the 

 sternum ; 2nd segment more than one-third yellow above, the black 

 markings approximating on the side, but leaving a large yellow space 

 including the oreillette on the lower anterior part of the segment; 

 segments 3 to 7 with yellow dorsal markings occupying more than 

 one-third of the segment, these markings extending laterally more 

 in their anterior part but in no case reaching the ventral suture ; a 

 broad yellow band on segment 8, nearly reaching ventral suture; 

 9 segment marked with yellow anteriorly; and there seem to be 

 traces of yellow on both anterior and hind margin of segment 10. 

 Segments 2 to 6 with posterior lunules. Superior appendages from 

 above much as in annulatus but longer, as long as last segment; 

 outer margin nearly straight; closely approximated at the base, 

 their inner margins, from the tooth, diverging regularly till about J 

 from the apex where they become jxirallel for a short space and then 

 again diverge to the acute apex. Inferior appendage rather deeply 

 emarginate. 



$. Similar : thorax with a small humeral spot. Abdomen : yellow 

 dorsal marking on 2nd segment continued without interruption on 

 the sides cephalad ; segments 3 to 7 marked much as in the male ; 

 about half of dorsum of 8 yellow ; yellow on 3, 4, 5 and 8 interrupted 

 by black dorsal arete ; segments 9 and 10 discoloured. 



Wings in both sexes with the costa clear yellow. Antenodals : 

 (^, forewings 19-20, hindwings, 14 ; $, forewings 17, hindwings 12-14. 



