June, 1897.] Calvert : Odonata of New York State. 91 



Diplax obtrusa ^a,^^«. Clarence, N. Y., July 2d; Elma, N.Y., 

 September 15th and Ridgeway, Ont., August loth. 



Diplax costifera Hageri. 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 ruhicimdula and obstrusa 

 occur together in low, wet meadows and along small streams, but rubi- 

 ciindula is here much the most abundant form. I have also taken vicina 

 among the reeds on the shores of Lake Erie, at Point Abmo. 



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 conferva 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 Bunn. 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. Ill, No. i, 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. 105, and are here marked (L.). 

 Professor Kellicott has kindly sent me a few notes which are designated 



