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. Hevden, 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 flv 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 July 31st 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 day to its mouth in Root River. 



17. Boyeria vinosa Say. Heyden, July 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 suddenly 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 

 quieth' 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 possiljly 

 ten deep, over the water. One end of this recess ended in the 

 bank, the only open side l)eing directed toward mid-stream. I 

 saw many Boyerias 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. ('), S and 9th. 



