NO. 2107. DRAOONFLIES, WASIIINOTOX AND OREGON— KENNEDY. 295 



of the genital valves vary greatly, not giving reliable characters. 

 (See figs. 72-73.) 



Of the two nymphs, vivida is covered with a fine pubescence, while 

 emma larvae are almost entirely free from pubescence. 



Described from a male, collected June 15, 1913, on Logie Creek, 

 Yakima County, Wasliington; reared, emerging June 25, 1913; skin 

 and imago deposited in the United States National Museum. Also 

 described from a female, an alcohohc nymph collected June 15, 1913, 

 on Logie Creek, and now deposited in the United States National 

 Museum, 



The only place I have collected vivida nymphs is on Logie Creek 

 at the place previously described. There on June 15, 1913, I took 

 42 nymphs varying in length from 3 mm. to 12 mm. Nine of these 

 were in the mature stage. The other 31 on examination and meas- 

 urement seemed to fall into two groups, which probably were a 1914 

 brood and a 1915 brood. As there were great differences among 

 those of the youngest brood this may have represented two broods 

 instead of one. I have not reared the female and have reared only 

 two males. 



3. NOTES ON ISCHNURA CERVULA ANg ISCHNURA PERPARVA. 



These notes were undertaken at the direct suggestion of Mr. E. B. 

 Williamson, who thought that descriptions of the live colors of these 

 species would be of value, especially in reference to any dimorphism 

 in the coloration of the females.^ In view of the present confusion 

 among the described species and varieties of Ischnura from the 

 Pacific slope, these notes have been made to include points other 

 than color. 



The two species are widely distributed over Washington and 

 Oregon. Wlierever I have found one of the species, the other, 

 though perhaps not so abundant, has always been found. Both 

 reach their greatest abundance around the alkaline ponds of the 

 upper Sonoran Zone, but occur commonly and in some places abun- 

 dantly in the Transition Zone. I have never found them in the 

 Canadian Zone, but I have done very little collecting at that altitude. 

 I have specimens of both species from the following localities: 

 Oregon— Baker Valley, elevation 3,400 feet; Eagle Valley, 2,500 

 feet; Deschutes Valley (Bend, Oregon), 4,000 feet; Columbia River 

 Gorge (Sherman, Oregon); Washington — Kittitas Valley, elevation 

 2,500 feet; Yakima Valley, 700 feet; Spokane Valley, 3,000 feet; 

 Palouse Valley. 



Both are all-season species, being on the wing from the first open 

 spring weather mitil heavy frosts occur in the autumn. Both are 



1 1 wish to thank Mr. E. B. Williamson for his constant help and encouragement, as it is he who started 

 me and has sustained mj' interest in this work. 



