530 NEW YORK STATE MUSEUM 



two ; and if some collector find the typical e x u s t a to be common, he 

 may aid the farther solution of this question by setting about to find its 

 nymph, I discuss below the single form which I have found within the 

 state. 



Ladona julia Uhler 



1857Libellula julia Uhler, Acad. Dat. sci. Phil. Proc. p. 88 

 1861 Libellula julia Hageu, Synopsis Neur. N. Am. p. 153 

 1867 Libellula julia HageD, Stett. ent. zeit. 28 : 192 



This species was very common at Saranac Inn. It was beginning to 

 appear in numbers on the wing at the time of our arrival, June 13. I 

 went out to the banks of Little Clear pond at sunrise of the morning of 

 the 14th and found a number of nymphs transforming, associated with 

 Tetragoneuria. The images were abundant along every roadside 

 during the month of June, and females were only a little less in evidence 

 than the males. Nymphs were taken abundantly from the trashy places 

 in the borders of Little Clear and Bone ponds, and a few were found in 

 Little Clear creek ; exuviae were seen in numbers clinging to the banks 

 of Colby pond, and a few along Stony brook near Axton. 



Nymph. Total length 24 mm; abdomen 15.5mm; hind femur 5.5 

 mm; width of head 5 mm, of abdomen 5.5 mm. 



Body slender, elongate, moderately hairy, dark colored, without distinct 

 pattern, but paler on the sutures and below. 



Head somewhat wider than long, with eyes not very prominent, and 

 hind margin slightly concave ; median lobe of the labium with a median 

 flat, toothlike prominence in the middle of its free border, on either side 

 of which the border is crenulate, with spinules inserted singly in the 

 notches between the crenulations; lateral setae six; hook slender, and 

 not very long; mental setae three each side. 



Abdomen with sharp lateral spines, relatively shorter than on the 

 nymph of deplanata; dorsal hooks on segments 4-8 straight and 

 sharp ; superior and inferior appendages of about equal length, and 

 about as long as the last two abdominal segments; lateral appendages 

 one fifth to one fourth as long as the others. 



The presence of three mental setae on the labium will distinguish this 

 species at a glance from the nymph ofL. deplanata of the south. 



LIBELLULA 



This genus contains the species which are, perhaps, the best known of 

 all our dragon flies. The imagos hover habitually over ponds in summer, 

 are large, and for the most part beautifully colored, and are everywhere 

 common. Eight species are known from the state, ai^d it is not likely 

 that any others will be found resident in numbers. It is of course always 

 possible for a few strays to be blown into new territory from distant 

 regions by high winds. The nymphs of five of these eight species are 



