June, 1897.] Calvert : Odonata of New York State. 
91 
Diplax obtrusa Hagen. Clarence, N. Y., July 2d; Elma, N. Y., 
September 15 th and Ridgeway, Ont., August 10th. 
Diplax costifera Hagen. Common along a dusty roadway near a 
mill pond, in the town of Amherst, September 2, 1895. Not seen 
elsewhere. 
Diplax vicina Hagen. This species with rubicundula and obstrusa 
occur together in low, wet meadows and along small streams, but rubi¬ 
cundula is here much the most abundant form. I have also taken vicina 
among the reeds on the shores of Lake Erie, at Point Abino. 
Diplax corrupta Hagen. The immature of this large species were 
abundant on reedy shores of Lake Erie, at Point Abino, on August 31, 
1896. In this state their rich fulvous color varied with black and pale 
green, and their glossy golden wings spread out to the sunlight, made 
them beautiful objects. When mature the colors become obscured and 
the insect is much less attractive. 
Mesothemis simplicicollis Say. Quite abundant along Tona- 
wanda Creek, August 12, 1896. Here the females were depositing their 
eggs on the confervae near the shore. In doing this they hovered a few 
inches above the water, dipping to the surface at intervals of a few sec¬ 
onds with a rhythmic vibratory motion, each time bringing the tip of 
the abdomen in contact with the aquatic weeds that were to serve as a 
nidus for their eggs. 
Pachydiplax longipennis Burnt, Rare. A few examples were 
found in June, 1895, about the Sagittaria in Black Rock Harbor. 
-«- 
ADDITIONS TO THE ODONATA OF NEW YORK 
STATE. 
By Philip P. Calvert, Philadelphia, Pa. 
In this Journal for March, 1895 (Vol. III, No. 1, pp. 39-48) I 
published a list, with notes, of all the species of Odonata known to me 
to inhabit New York State. Soon after, Dr. Lintner sent me notes on 
the Odonata in the State Collection at Albany, including many made 
by Dr. Hagen, and also a considerable number of unidentified dragon¬ 
flies for determination. This material and the results of its study have 
been referred to by Dr. Lintner in his recently published Eleventh Re¬ 
port as State Entomologist, for 1895, P* io 5> and are here marked (L.). 
Professor Kellicott has kindly sent me a few notes which are designated 
