198 
Journal New York Entomological Society. [voi. vi. 
Libellula cyanea Fabricius. June, July, August. 
Libellula exillena Westwood , form yibrans {Fabricius .?) Kirby. 
Not uncommon on the Island in August, 1894; much less common in 
July, 1895. 
Libellula exillena Westwood , form* incesta Hagen. July, 
August. 
Libellula quadrimaculata Linn'e. Arlington, May n, 1889, 
and plentiful June 19, 1893. 
Libellula semifasciata Burmeister , April 25, 1896. May, June, 
July, August, September. 
Libellula pulchella Drury. May, June, July, August, September. 
Plathemis trimaculata De Geer. May, June, July, August, 
September. 
Micrathyria berenice Drury. May, June, July, August. Often 
of a quiet summer evening countless numbers of this species will be seen 
settled on the grass stems in the salt meadows, in which position they 
spend the night. When they are particularly abundant the July crop 
of mosquitoes is speedily reduced in numbers, being devoured at head¬ 
quarters. 
Nannothemis bella Uhler. June and July, 1888, at the Four 
Corners iron mine ponds. 
Celithemis elisa Hagen . June, July, August. 
Celithemis eponina Drury. May, July. 
Leucorhinia intacta Hagen. May, June. 
Diplax rubicundula Say. July, August, September. 
Diplax obtrusa Hagen. July. 
Diplax semicincta Say. July 15, 1894. Four Corners iron 
mine ponds. 
Diplax vicina Hagen. September, October, November. While 
my companion and I were sitting in the sun on October 21, 1892, five 
of these dragonflies at one time lit upon us, wishing to sun themselves 
also. Some lit on my hands—one on the end of my thumb. The 
dragonflies are most attracted if you have on light colored garments, or 
a newspaper spread on the ground is a favorite resting place. 
Diplax corrupta Hagen. Shore at Eltingville, May 27, 1896. 
(See this Journal, Vol. V, p. 95.) 
Perithemis domitia Drury. June, July. 
Mesothemis simplicicollis Say. June, July, August. 
Pachydiplax longipennis Burmeister. June, July, August, Sep¬ 
tember. 
