REPORT OF THE STATE ENTOMOLOGIST 1907 197 
transforming in some numbers. ‘There I obtained 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; widtk 
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 9g; 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 gth segment, and across its apex beneath. The 
labium has ro 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 to 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, 
Museum Bulletin 47, Sympetrum and Leucorhinia 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 10-11, in all our common lesser Sympetra they are 9; in the aberrant 
So CURPUM DU wun Wey Bre 105} 
