AQUATIC INSECTS IN THE ADIRONDACKS 



453 



a favorite foraging ground for the adults -, May 30, 1897, and for several 

 days thereafter, they were flitting about this meadow in numbers, but 

 were so. active that it required some time to capture many specimens. I 

 collected once enough nymphs to fill a quart fruit jar from Six Mile 







r* 



Fig. 11 Genitalia of Gomphus descriptus Banks, a, lateral view of end of abdomen of 

 male ; & lateral view of the genital hamules of the male (Inverted position) ; c dorsal view of the 

 terminal abdominal appendages of the male ; d ventral view of the vulvar lamina and end of abdo- 

 men of female 



creek near Ithaca in an hour. I will mention a variety of this species 

 which occurred at Saranac Inn, before describing the nymph. I bred 

 the species at Ithaca and collected the variety at Saranac Inn, but am 

 unable to find any differences between them in the immature stages ; 

 the description will therefore stand for both. 



G. descriptus borealis n. var. This is the dragon fly figured 

 by Hagen in Selys's Mono graphic des Goi?iphines (pi. 9, fig. 2, dorsal view) 





1 



Fig. 12 Gomphus descriptus borealis n. uar. Letteringasinflg.il 



as Gomphus spicatus. There are several points of difference 

 between this insect a.nd G. s p i c a-t u s, one of the most obvious of 

 which is the yellow color of the external face of the tibiae in s pi c a t u s. 

 The appendages and the proportions of the apical segments of the 

 abdomen are different. 



