144 
The Ohio Naturalist. 
[Vol. VII, No. 7, 
Goulais drainage. Several were seen at Oden but none were 
captured there. The great bulk of this dragonfly and its peculiar 
flight, with its abdomen curved as though it would bring the 
center of gravity forward more nearly under the wing bases, are 
distinctive. 
16. Cordulegaster maculatus Selys. Heyden, Aug. 2d; 
Searchmont, Aug. 1, 6 and 9th. Nine males and three males. 
These specimens are larger than others I have seen. At Heyden 
two females were taken and these were observed to fly down 
from trees alighting on algae covered rocks in the stream bed. 
On the portions of these rocks not covered with water they 
crawled about in an awkward, almost crippled, manner thrusting 
the abdomen with much commotion into the algae beneath the 
water. Males at Heyden alternated between the trees and short 
flights over the water. At Dam Creek, where six males were 
taken during the forenoon, the stretch of water patroled was 
greater and the dragonflies were not interrupting their flight by 
frequently alighting in trees. The single female taken along 
Dam Creek alternated short flights with rests on low shrubs 
growing on the stream's banks. On Julv 81st another species 
of Cordulegaster was seen near a small much-shaded spring 
which discharged a small volume of water into the creek which I 
followed that dav to its mouth in Root River. 
17. Boyeria vinosa Say. Heyden, Julv 31st and Aug. 2d 
and 3d; Searchmont, Aug. 6, 7, 8 and 9th. Twenty-four males 
and one female. A common species along the streams where its 
tendency to examine critically every object projecting above 
the water often makes its capture an embarrassing matter to the 
collector. More than once as I waited for an approaching male 
that insect suddenlv left the line of flight I had mapped out for 
it, flew to within an inch of my legs, circled around one leg a 
time or two, then about the other, then about both, and then 
quietlv resumed its flight along the stream, oblivious to the net 
which had been frantically fanned all around it. Along Root 
River a portion of a fallen bridge lay in the stream forming a 
dark recess a few inches high, six or eight feet wide and possibly 
ten deep, over the water. One end of this recess ended in the 
bank, the only open side being directed toward mid-stream. I 
saw many Boverias fly along the stream at this point and with¬ 
out exception all flew back into this recess, where they were 
completely concealed from the collector. Some of them re¬ 
mained within only a few seconds while others were there pos¬ 
sibly a full half-minute. This species is more crepuscular than 
any other North American Aeshnine known to me. 
18. Boyeria grafiana Williamson. Heyden, Aug. 2d; Search¬ 
mont, Aug. 6, 8 and 9th. 
