49 
evidently watching for game. and making short dashes forward 
betimes, presumably to seize some small insect driven from 
shelter by the wind. 
Mr. Adams and Mr. Hart observed a large swarm which 
gathered in the lee of the field laboratory boat August 8, at 
twilight, and after half an hour or more of rapid circling about 
scattered abruptly at about 7:40. An adult Anar was once 
seen to devour an agrionid imago. 
The species covers the continent from Alaska to the West 
Indies, and is found in eastern Asia. 
Cabot (’81, p. 15; Pl. I., Fig. 2) has figured the nymph, and 
many different reproductions of his figure are current. The 
following brief description covers the ‘more important char- 
acters. 
The nymph measures 45 mm.; abdomen, 31 mm.; hind 
femur, 8 mm.; width of abdomen 8 mm., of head 8 mm. 
The head is flat and broad, widest across the posterior 
third of the eyes. Antenne minute, slender. Eyes broad, lat- 
erally prominent, produced well toward the dorsal median line 
at their posterior internal angles. Labium very long and flat, 
extending posteriorly beyond bases of middle legs; median lobe 
with a narrow median cleft. Lateral lobes oblong, denticulate 
along inner margin,an incurved tooth at tip; hook long, strong. 
Abdomen widest across segment 7, tapering both ways. No 
trace of dorsal hooks; short lateral spines on segments 7 to 9. 
Hind margin of 9 (as seen from above) straight. Superior 
appendage a trifle longer than segments 9 and 10, notched at 
tip; inferior appendages a little longer, sharp pointed; lateral 
appendages half as long. 
Young nymphs are more unlike full-grown ones in habitus 
than are those of most other species. In the earlier stages the 
abdomen appears more attenuated toward the base. The supe- 
rior appendage is at first very short and blunt and directed 
upward, but after a few molts it becomes elongated and 
notched at the tip, though it remains for a time much shorter 
than the inferiors. Lateral spines on 7 to 9 appear very early. 
