Notes on Indiana Dragonflies. 103 
Lagrange Co., June 17, 1917; outlet of Webster Lake, Kosciusko Co., July 
4, 1917. 
94. Somatochlora linearis Hagen. This rare species was taken along 
Flat Creek in Wells County again in 1919, on July 9. S. charadraea, for-: 
merly taken on the same creek, seems to have disappeared as it has not been 
seen since 1913. 
95. Somatochlora tenebrosa Say. This, like Cordulegaster obliquus, is 
another species which has not been taken in Indiana since Say’s time till 
it was taken on July 6, 1919, at Devil’s Hollow, Aboite River, Allen County. 
The two males seen and captured were hovering and flying about little 
pools in a very small creek flowing in the dense shade of small timber. 
This little creek, about eighteen inches wide, evidently spring fed, is a 
right hand tributary of the Aboite River, near the upper end of Devil's 
Hollow. 
96. Libellula cyanea Fabricius. Creek and swamp five miles east of 
Lagrange, Lagrange Co., June 27, 1920. 
99. Libellula luctuosa Burmeister. Shriner Lake, Whitley Co., Sept. 16, 
1917. 
101. Libellula quadrimaculata Linne. Three miles east of Ontario, 
Lagrange Co., June 17, 1917. 
104. Plathemis lydia Drury. WDeyil’s Hollow, Aboite River, Allen Co., 
July 18, 1919; creek and swamp five miles east of Lagrange, Lagrange Co., 
June 27, 1920. 
105. Perithemis tenera Say. Round Lake, Whitley Co., August 25, 1918. 
112. Sympetrum rubicundulum Say. Salamonie River, Huntington Co.. 
August 5, 1917. Along the interurban railroad north of Bluffton, between 
the Wabash River and the Clover Leaf railroad. is a long shallow pond 
formed by excavations along the interurban grade. About this pond occur 
numbers of the yellow-winged form of rubicundulum, once regarded as a 
species under the name assimilatum. On Sept. 13, 1914, the following four 
species of Sympetrum were flying at this pond: ambiguum, obtrusum, rubi- 
cundulum and vicinum. Obtrusum and rubicundulwin were about in 
equal numbers and were much more numerous than the other two. Of 
fifteen males and two females of rubicunduluwm taken, all but one male 
were of the yellow-winged form. On Sept. 2, 1917, ten males and three 
females were taken at this same pond. Of these males two had clear wings, 
five were yellow winged and three were intermediates. All the females were 
yellow-winged. At some deep partially shaded gravel pits about a quarter 
of a mile distant, four males taken the same date were all clear winged. I 
have noticed at other places than this interurban pond that the yellow- 
winged form occurred about shallow warm pools or was seen late in the 
season when ponds were at low water stage, and I believe there is some 
relation between light or warmth, or both. in producing this color form. 
115. Pachydiplaxr longipennis Burmeister. Creek and swamp five miles 
east of Lagrange, Lagrange Co., June 27, 1920. 
117. Leucorhinia intacta Hagen. Creek and swamp five miles east of 
Lagrange, Lagrange Co., June 20 and 27. 1920. 
119. Celithemis eponina Drury. One male and one female of this species 
and a single female of (. elisa, all the specimens seen, were taken along the 
Wabash River in Wells County, August 26, 1917. The day was very windy 
