37 
abundant in Ohio in late summer ; his notes on their habits are 
worth repeating here,as they tend to confirm the preceding 
statements of the habits of the nymph. “It prefers seclusion, 
hence should be looked for along ponds and streams with well- 
wooded banks, where branches overhang the water, and where 
half-submerged logs and rubbish abound. The males may be 
seen from early in the forenoon until dark, on warm days, ex- 
ploring every corner among the obstructions at the water’s edge. 
An interesting habit noted was that it would often fly out and 
carefully examine a passing skiff. The females, when not ovipos- 
iting, are suspended from some overhanging twig.” Van Duzee 
(97) makes a similar observation. The imago is widely dis- 
tributed, being reported from Canada and the eastern United 
States as far south as the Carolinas, and west to Arkansas and 
Ulinois. Professor Frank Smith took examples at Macatawa, 
Mich., where he says it is fairly common. In Illinois it hag 
been taken only at Havana, Bloomington, and Urbana, a single 
specimen in each case. The one taken at Havana was flying 
along the river front. The extreme dates on record are June 
20 and October 15, most of the occurrences being in July. 
The nymph measures 35 mm.; abdomen, 24 mm.; hind 
femur, 6 mm.; width of abdomen, 7.5 mm., of head, 7 mm. 
Body elongate ; eyes large and very prominent, the sides of 
the head extending backward from the middle of the hind 
border of the eyes to very prominent slightly elevated hind 
angles, between which the hind margin is regularly concave. 
Labium extending between middle legs. Median lobe prom- 
inent, cleft, a conspicuous tooth on each side of cleft, at some 
distance from it, on front margin. 
Lateral lobes truneate apically, with a stout tooth at the 
inner apical angle and the convex inner margin denticulate. 
Hook stout, arcuate, and rather sharply incurved at tip. 
Prothorax a little narrower than hind margin of head. 
Abdomen widest across segment 7, wing-cases reaching only the 
middle of 4, lateral spines well marked on 5, larger and gradu- 
ally increasing in length on succeeding segments. Inferior ab- 
