ODONATA OF BAJA CALIFORNIA. 



495 



half shorter and much smaller on the inferiors. A nar- 

 row, yellow, antehumeral stripe. Abdominal segments 8 

 and 9 clear blue with a lateral black ray, not touching 

 the apex, very short on 9. Superior appendages half 

 shorter than the last segment, thick, truncated at the 

 apex which is bent downwards. Inferior appendages 

 flattened like a goose's foot, forming three* points, one 

 external and superior, one internal and subbasal, and one 

 median, slender, longer and curved inwards. 



The differences between dejixa and -perparva are then 

 stated to be — 



1. 



/. perparva Selys 5 . 

 Abd. 17-18. Hind wiu^ 11-1-2 



l.defixa Selys (uot Hagen). 

 A little larger, al). 21-22, h. w. 



13-14. 

 of front wiugs deep black, of hiud 



wiugs gray 

 with a broad black band externally 



rising from the second half of 10 



a little obscure 



internal basal branch more distinct 



2. Pterostigma pale, a little red- 

 dish 



3. Femora with an obscure, exter- 

 nal line ill defined or maculate 



4. Forked process on 10, viewed 

 in profile, rising from base of 10 



5. Appendages yellow 



6. Sup. app. with a small tooth al 

 the base internally 



Habitat. Calif ornia.t Northern California. 



Baron de Selys remarks (/. c. p. 262) that it is possible 

 that his defixa " may be only a larger race or variety of 

 ferparva, and that the difference in the color of the 

 pterostigma of the superiors and of the feet may result 

 from the specimens of defixa being very adult, while 



those of pcrparva may be newly transformed It is 



probable that this species [/. e. defixa Selys] is the 

 defixum of Dr. Hagen. I dare not refer it there with 



" The presence or absence of the third or median point aj)pears to be a 

 variable character uot of specific value. 



t Given as "Texas occidental" in the description cited, corrected to 

 California by McLachlan, Zool. Record for 1876. 



2D Ser., Vol. IV. ( 33 ) February 19, 1895. 



