REPORT OF THE STATE ENTOMOLOGIST I907 I97 



transforming in some numbers. There I obtain.ed specimens 

 in transformation, furnishing me a new life history; the descrip- 

 tion of the nymph follows : 



Length, 17mm; abdomen, 9 mm; hind femur, 5 mm; width 

 of head, 5mm; of abdomen, 6 mm; body rather smooth, mod- 

 erately depressed, greenish brown obscurely mottled above, 

 paler beneath with a conspicuous banding on the under surface 

 of the abdomen : there are three broad brown bands, one median, 

 and . two lateral (adjoining the ventral sutures), obsolescent 

 anteriorly and more or less confluent posteriorly. Abdomen 

 with no dorsal hooks at all (and therein differing markedly from 

 all the other species of the genus hitherto made known)^; 

 short, stout, straight lateral spines on segments 8 and 9; those 

 of 9 longer than the segment, and twice as long as those of 8; 

 inferior appendages with very slender tips slightly incurved. 

 Superior appendage slightly shorter, and laterals one third as 

 long as the inferiors ; there is a fringe of slender hairs along 

 the sides of the 9th segment, and across its apex beneath. The 

 labium has 10 lateral setae, the two basal ones being smaller 

 than the others, and 12 mental setae, the outer seven longer 

 than the others. 



Calopteryx maculata and C. aequabilis. A few specimens of 

 both these species hovered about the mouths of the inflowing 

 streams of Moose river below the hatchery. They were about 

 equally common. 



Lestes vigilax. This species was found associated with 

 Leucorhinia frigida in the Lily pond, and like it, was 

 transforming abundantly. From material obtained there on 

 June 30th, and other material obtained at Bald Mountain pond 

 on July 2d, the following description of the nymph is drawn : 



The nymph is of the excessively elongate form characteristic 

 of this genus and described for the group on page 231 of Bulle- 

 tin 68. Length 26 mm and gills 10 mm additional. The color 

 is greenish brown, there is an obscure band of brown on each 

 femur and there are three such bands across the gill plates, 



^ In the key to nymphs of Libellulinae given on pages 508-9 of N. Y. State 

 Museum Bulletin 47, Sympetrum and Leucojhinia are separated on char- 

 acters found in relative length of dorsal abdominal hooks ; and by the key 

 this species would be traced to Sympetrum : at the time that key was pre- 

 pared, only Sympetra were known to lack dorsal hooks. A new distinc- 

 tion will, therefore, have to be found between these genera. The species 

 now known as nymphs may be separated by the number of raptorial setae 

 on the lateral lobe of the labium; these are in the three species of Leucor- 

 hinia lo-ii, in all our common lesser Sympetra they are 9; in the aberrant 

 S. curruptum they are 13. 



