June, '05] ENTOMOLOGICAL NEWS. 189 



both appear equally fresh, and there can be but one interpreta- 

 tion, viz., that there is here a color dimorphism in the females 

 such as is known to exist in some other species of the genus. 



Another fact of still greater interest bears on the relationship 

 of the species to the genus. In describing the species Dr. Cal- 

 vert places it doubtfully in this genus with the remark (/. c, 

 p. 492), " to write of the female that it possesses no ventral 

 spine to the eighth segment is almost equivalent to excluding 

 this species from the genus Ischnura." One of the females in 

 my possession shows a very small though perfectlj' distinct 

 ventral spine, the other agrees with Calvert's description in not 

 possessing it. This variation has already been shown to exist 

 in /. denticollis Burm., and /. demorsa Hag. (Calvert, Biol. 

 Centr. Am., Neur. , pp. 128-129). 



Ischnnra perparva (McLachlan MS.) Selys. 



Quite common at the small pond near the Four-mile House 

 at Victoria. The habits of the female are much like the bluish 

 female of verticalis which it closely resembles in color. On my 

 first visit to the pond only the females were noted, but on the 

 second visit, July 19, '02, several pairs were taken in coihi. 

 The females seemed much more common than the males. A 

 single female was taken at Langford Lake, July 20, '02. 

 Seattle, Wash., July 14, '01, two males. 



Ischnnra cervnia Selys. 



Common and widely distributed. Victoria, July 17, '01, and 

 July 19, '02, both sexes abundant ; Langford Lake, July 20, 

 '02, abundant; Agassiz, July 18, '02, common. Shawnigan 

 Lake, (Anderson). Kaslo, July 17, one male, and Augu.st 6, 

 '03, one male (Currie). Seattle, Wash., July 14, '01, common. 

 (Ophiogomphns occidentis Hagen. 



Two males of this species were taken along Pine Creek at 

 the head of Lake Washington near Seattle, Wash., July 14, 

 '01. It has not yet been noted for British Columbia but may 

 be looked for in the swift streams of the southern part of the 

 province). 



(Gomphns confraternns Selys. 



Five specimens, both sexes, of this species were taken about 



