39 
The head is evenly narrowed behind the eyes to the sharply 
angular hind angles.* The labium is abruptly widened in its 
apical third; its median lobe is without teeth, but with the 
usual fringe of hairs and closed median cleft. The lateral 
labial lobe is slender beyond the base of the hook, and is grad- 
ually narrowed to a shightly incurved point, with indistinct 
denticulation along its inner margin. 
The abdomen bears distinct lateral spines on segments 5 to 
9, those of 6 to 9 hardly increasing in size posteriorly, those of 
5 somewhat smaller. The abdominal appendages are a little 
declined at their sharp and slender apices; the superior is less 
than two thirds the length of the inferiors, deeply notched at 
the tip; the laterals are about half as long as the superior. 
V. Ascuna Fabr. 
The nymphs of this genus resemble those of Anar, but 
have four or five pairs of lateral spines instead of three. Their 
habits are similar to those of Anar, but they appear to be more 
retiring and inactive, being often found clinging to submerged 
roots and twigs. A single example was found in the Illinois 
River at Havana upon a submerged branch. It was clearly an 
Aischna nymph, but escaped before it could be further studied. 
Dr. R. H. Wolcott had under observation a nymph of this genus 
in Michigan. It liked to cling to the under side of floating ob- 
jects. It was once seen eating an Agron nymph, but was usu- 
ally fed on flies, of which it ate two to four a day, coming to the 
surface for them each morning, and refusing food in the after- 
noon even when, as an experiment, the morning meal was 
purposely omitted. 
The imagos are of large size, and are dark brown and blue, 
instead of green as in Anar, their wings clear, with black veins. 
hike Hpiwschna heros they seem to have a fondness for the 
vicinity of dwellings. 
*In the younger of Mr. Needham’s Texas specimens these angles bear distinct 
tubercles. : 
