AQUATIC INSECTS IN NEW YORK STATE Q47 
Previously I had found the species, likewise in transformation, 
at MacLean N. Y., when on May 30, 1897, in company with 
Mr A. D. MacGillivray, I went on a collecting trip from Ithaca 
thither. There it inhabited a spring-fed pool near the banks of 
Fall creek. Specimens in all stages were picked from the culms 
of the grasses and sedges standing in the pool. 
The imagos appear to keep rather close to shelter and to their 
native shallows, spending but little time on the wing. Trans- 
formation takes place for the most part in the morning or early 
forenoon, and the place selected is at most but a few inches 
above the water. The species is of wide distribution, but is 
everywhere quite local. Imagos will be readily recognized from 
the unique combination of blue and yellow on the thorax, shown 
on plate 18, figure 2. | 
Nymph. Measures in length 12mm, gills 6mm additional. 
Color greenish brown, paler beneath, marked with darker brown 
on frons, hind angles of the head sides of thorax and middle of 
abdominal segments; legs with two darker transverse bands on 
the femora and a less distinct, basal one on all tibiae; gills 
greenish brown, with a series of darker points along the spinose 
margins and with paler apexes. 
Body slender; head wide, with large and strongly angulate 
hind angles and a deep posterior notch between them; antennae 
seven jointed. Labium rather short, the hinge reaching poster- 
iorly between, but not beyond, the bases of the fore legs. 
Median lobe moderate; mental setae three each side; lateral 
setae five. Thorax narrower than the head. Legs slender, very 
scantily hairy, but with a double inferior row of spines. Wings 
reaching posteriorly well on the base of the fifth abdominal 
segment. Abdomen with sides parallel, or very little tapering 
toward the tip. Gills narrowly oblanceolate, widest at four 
fifths their length. 
AMPHIAGRION 
A single species falls within the limits of our fauna. 
Amphiagrion saucium Burmeister 
Plate 18, fig. 1-3; plate 15, c 
18389 Agrion saucium et A.discolor Burmeister, Handb. Ent. 
2:819. 
1876 Amphiagrion saucium Selys, Acad. Belg. Bul. (2) 41:285 
18909 Amphiagrion discolor Kirby, Cat. Neur. Odon, p.148 
1898 Amphiagrion saucium Calvert, Am. Ent. Soc. Trans. 
20 :235 
