1898.] 



NATURAL SCIENCES OF PHILADELPHIA. 



149 



Fig. E. 

 Fig. 3 A-E x 25. 

 Hind margin of the occiput of Anax parthen- 

 ope, 9 showing variations in the two processes or 

 "horns." A. Individual from Kashmir {bacchus 

 Hagen), B from Kashmir, C from Indre, France, 

 D from Yokohama showing asymmetry, E from 

 Yokohama. ME hind margins of the eyes. 



ings that I long held it 

 for the same species." 

 He then gives a number 

 of differences which, he 

 believes, distinguish the 

 two forms. 



With the more abun- 

 dant material above 

 cited before me, I find 

 that these differences 

 are not constant, but 

 vary individually. Even 

 what is apparently 

 the most important of 

 these, the possession by 

 bacchus of a backward- 

 ly-directed, conical tooth 

 on each side of the occi- 

 put of the female, is of 

 this varying nature. Of 

 the three females here 

 quoted, one has these 



teeth less developed than in a female of parthenope from France, as 

 figs. 3 B and C show. 



The close relationship existing between the Odonate fauna of 

 Kashmir and that of Europe, referred to in the introduction of this 

 paper, is clearly seen from the results of a comparison of individuals 

 of this species from France, Kashmir and Japan, as follows : 



Humeral and 

 second lateral 

 thoracic sutures 



Sides of the first 

 abdominal seg- 

 ment inferiorly 



2^39 Kashmir 

 1 £ 2 9 France 



with a narrow black 

 line for their entire 

 length. 



32 $ 4 9 Yokohoma 



with some discontinuous 

 black marks. 



with a quadrate with a small round, 

 dark brown spot blackish dot near the 

 reaching from the middle of the segment, 

 base to the middle 

 of the segment. 



