118 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY 
cally ])()i'c;il in ningo, and ar(> citlicr tianscontincntal (jf nearly so. 
They inhabit elevations between 600 and 4000 feet, and are also 
to be found away from the coast, in Maine north of the 44.5 paral- 
lel, or in "extra-limital" island or migration-point stations farther 
south. New England stations are listed in the author's Manual, 
and there arc undoubtedly stations outside New England that 
through oversight have not been included here. 
1. Aeshna caerulea septentrionalis, transcontinental and circvmipolar. It 
has never been taken elsewhere in the United States, })ut range's north- 
ward to Labrador and probably to iVlaska. 
2. Somatochlora cingulata, east-central. Dr. Muttkowski's Massachusetts 
record cannot be traced. It has not been recorded from elsewhere in the 
United States but ranges northward to Labrador. Dr. Tillyard (Proc. 
Linn. Soc. N. S. Wales, 34 : 41, 1914) states that Maine is the zoocenter 
of the genus Somatochlora as shown by specific contours, but since the 
publication of Mr. F. C. Whitehouse's iilberta lists this would seem to be 
refuted. 
3. Ophiogomphus colubrinus, east-central. It has been recorded doubtfullj- 
from only one other station in the LTnited States: Yellowstone (7,000 ft.), 
Wyoming. It ranges northward to Newfoundland, Manitoba, and North- 
west Territory. 
4. Somatochlora albicincta, transcontinental, summer. It has been re- 
corded also in the United States from Mt. Rainier (14,.363 ft.), Washing- 
ton, and ranges northward to Labrador and Alaska. 
5. Somatochlora franklinii, east-central, spring. The only other United 
States station is Pt. Abbaye, Pequaming, Michigan (600 ft., Lat. 47° N.). 
It ranges northward to Labrador, Alberta, and Northwest Territory. 
6. Aeshna juncea, transcontinental and holarctic. There are but two other 
stations for it in the United States: Shell Creek (8,000-10,000 ft.), Big 
Horn Mts., Wyo., and southern Colorado at an elevation of from 10,000- 
11,000 ft. It ranges northward to Labrador and Alaska. 
7. Somatochlora forcipata, transcontinental, spring and summer. It has 
been taken at only one other LTnited States station: Whitefish Pt., Chip- 
pewa Co., Michigan (600 ft., Lat. 46.5° N.). It ranges northward to 
Labrador and Northwest Territory. 
8. Leucorrhinia hudsonica, transcontinental, spring. The Winchendon, 
Mass., record is from an " e.xtra-limital " island. It has been taken at 
two other stations in the United States: Pequaming (600 ft., Lat. 47° N.), 
Michigan, and Divide (1,500 ft., Lat. 46° N.), Wisconsin. It ranges north- 
ward to Labrador and Alaska. 
9. Cordulia shurtleffi, transcontinental, spring and summer. The Massa- 
chusetts and Connecticut stations are " extra-hmital " islands. It has 
been taken at four other stations in the eastern L'nited States south of 
New England: Tunis Lake (3,500 ft.) and Saranac Inn (1622 ft.). New 
York; Dawkill Pond (900 ft.). North Mt. (2,000 ft.), and Perdix (348 ft.), 
