380 PROCEEDIXaSi OF THE NATIONAL MTTf^EVM. vol.37. 



found. I have also seen them flying low over the water within 50 yards of the shore, 

 and have once or twice noticed the female flying very close to the water, striking the 

 surface with the tip of the abdomen at intervals of a few yards. 



In the glades and wood roads I have taken only the males and have found them 

 most plentiful during July, although they fly till the second or third week of August. 

 The later hours of the afternoon, before sundown, seem to be their favorite time for 

 foraging. They fly very swiftly, in a more or less regular beat up and down a road 

 or opening in a wood, usually about 4 or 5 feet from the ground, but sometimes 15 

 to 20 feet. They are seldom seen to rest. They disappear before sundown. 



At Go Home Bay I have found them in much larger numbers. The shores of this 

 bay are low, well-rounded masses of Laurentian gneiss, exceedingly irregular in con- 

 tour, and the bay is studded with innumerable rocky islands, more or less sparsely 

 clothed with stunted white pine, red and white oak, aspen, white birch, junipers, 

 Vacciniums of several species, and many other plants, including a great variety of 

 mosses and lichens. The Macromias breed about the rocky shores in all but the most 

 exposed situations. They do not occur in the islands outside the limits of Go Home 

 Bay, i. e., not upon the barren, wind-swept islands of Georgian Bay. The island 

 upon which the biological station is built lies at the mouth of Go Home Bay, and the 

 Macromias were found upon it in considerable numbers, the nymphs transforming 

 most commonly upon the more sheltered parts of the island. The boathouse, which 

 was one of the favorite spots for transformation, is built in a little cove a few yards 

 wide, where the shore is somewhat marshy, a few reeds and pipeworts growing in the 

 water here and there. The nymphs would climb up the sides of the boathouse, usually 

 to the edge of the roof, about 7 feet, but sometimes only 2 or 3 feet. I have also found 

 exuviae upon the dwelling house, which is built upon a rocky hummock about 12 feet 

 high and 30 feet from the water's edge. 



The first imagoes seen in the season of 1907 appeared July 4, but in 1908 they began 

 to transform on June 26, and were coming out in considerable numbers on the 28th 

 and 29th. The usual time for transformation is in the morning between 7 and 8, but 

 we found one individual transforming in the evening of a cloudy day. For the first 

 two weeks or so in Jidy the imagoes are easily taken, as their flight is weak, and they 

 are frequently found hanging from the branches of trees and shrubs, the two sexes in 

 about equal numbers. Later in the season, i. e., during the latter half of July and in 

 August, they became pretty well distributed through the woods and were seen only 

 occasionally about the island. At this time the females are seldom seen. The woods 

 are for the most part sparse, with numerous open, rocky places, and the Macromias fly 

 back and forth in these openings, frequenting especially openings partly surrounded 

 by a thick growth of trees. There are many depressions in the rocks, which are filled 

 with sphagnum and many bog plants. The openings are surrounded by a zone of 

 black spruce, white birch, and scattered red maples, with an undergrowth of moun- 

 tain holly, Gaylussacia resinosa, Vaccinium canadensc, and a few other plants. The 

 open central parts of these swampy depressions are favorite resorts for Macromia, Epi- 

 cordulia, and Tetragoncuria. 



At Walnut Creek, Putnam County, Indiana, where I took this 

 species along the stream, the flight was very swift, restless, and 

 erratic, though each individual seemed to have a more or less definite 

 range. 



Material examined. — Province of Quebec, July 20, 1895, female, 

 Abbe Begin (P. P. C). De Grassi Point, Ontario, July 19 and 31, 

 1901, 2 males, E. M. Walker (E. M. W.); July 25, 1902, male, E. M. 

 Walker (E. M. W.). Go Home Bay, Georgian Bay, Ontario, July 4, 



