122 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY 
taken across tlio iiitcilohutc iiiorainul barrier on Cape Cod. They 
inha})it the spring runs, cold streams, or (primitive) ponds, and 
are on the wing in early spring. 
27. Chromagrion conditum, eastern, spring. South of New England it is 
recorded from New York: Ithaca (.381-814 ft.), Hamburg (796 ft.), Mc- 
Lean (1,119 ft.), Saranac Inn (1,622 ft.); New Jersey: Brown's Mills 
(71 ft.), Hewitt (41.3 ft.), Lakehurst (.50 ft.); Pennsylvania: Idlewild 
(1,200 ft.), Pine Creek (808 ft.); Maryland: Lakeland (.56 ft.), Hyatts- 
ville (46 ft.), Great Falls (1()7 ft.); Virginia: Great Falls (167 ft.); 
North Carolina: Raleigh (300 ft.); Tennessee: Ashland City (408 ft.); 
westward it is found in northern Ohio, Indiana, and Illinois northward to 
Wisconsin: Chippewa Falls (866 ft., Lat. 45° N.). In Canada it is known 
from Quebec and Ontario. 
28. Ophiogomphus rupinsulensis, east-central, spring and early summer. 
South of Canada, where it is known from Quebec to Alberta, and outside 
New England, it has been recorded on the Atlantic coast from New 
Jersey, Dover (510 ft.), Halifax; from Pennsylvania: .Allegheny Co. 
(750 ft.); New York: Ithaca (814 ft.) ; Maryland: Glen Echo (100 ft.); 
Tennessee: Stone River (700 ft.); central Ohio (7.50 ft., Lat. 40° N.); 
northern Indiana (750 ft., Lat. 41° N.); northern Illinois (.560 ft., Lat. 
42° N.); northern Wisconsin (1,500 ft.); and from North Dakota, Cale- 
donia (800 ft.). 
29. Cordulegaster diastatops, eastern, spring. South of New England it is 
recorded from New York: Ithaca (814 ft.), McLean (1,119 ft.); New 
Jersey: Hewitt (413 ft.), Lake Hopatcong (914 ft.), Lakehurst (.50 ft.); 
Maryland: Hyattsville (46 ft.); West Virginia: Cranesville (2,000 ft.); 
North Carolina: Raleigh (300 ft.); and from northern Indiana. In 
Canada it is known from Nova Scotia, New Brunswick, Quebec, and 
Ontario. 
30. Cordulegaster maculatus, eastern, spring. South of New England it is 
reported from New York: Saranac Inn (1,622 ft.), to sea level; New 
Jersey: Newfoundland (770 ft.), Greenwood Lake (618 ft.), Lakehurst 
(50 ft.), Staten Island, Lacey (25 ft.); Pennsylvania: Ohio Pyle (1,224 
ft.); Maryland: Plummers Is. (sea level), Bladenburg (25 ft.); District 
of Columbia (25 ft.); Virginia: Great Falls (.500 ft.), Enola (500 ft.), 
Arlington (420 ft.); North Carolina: Raleigh (300 ft.); and Georgia (an 
old record with exact locality doubtful, — Screven Co. ?). It is also 
known from northern Indiana, and in Canada from the same Provinces 
as the last species. 
31. Cordulegaster obliquus, eastern, spring. South of New England it is re- 
corded from New York: Pine Island (408 ft.), New York City (50 ft.); 
New Jersey: Lake Hopatcong (914 ft.), Pahsades (100 ft.); Pennsyl- 
vania: Squaw Run (1,000 ft.); District of Columbia (sea level) ; Virginia: 
Enola (500 ft.); and from Kentucky and Georgia (old and indefinite rec- 
ords). Westward it is recorded from Ohio, Indiana, Illinois, (Texas?), 
Kansas (800 ft.). In Canada it is known from Quebec and Ontario. 
