Hagen.] : 270 [January 22, 
This male, the only one known, and in very bad condition, has 
been in Baron De Selys Longchamps’ hands, and besides this the | 
very imperfect fragments of the female, from New Jersey, in Mr. P. 
R. Ubler’s collection. 
This beautiful species imitates by the spotted border of the wings 
FE, obsoleta. For both species new and more perfect specimens are 
necessary to determine surely their position. 
26. Cordulia cynosura Say. C. lateralis Burm. Hag. Syn., 
139, 15. 
No. 75. 3, Lib. cynosura Say Mss. (Say’s determ.). Randal, Stow, 
Mass. 
Say describes only the male from Massachusetts, sent to him by | 
Dr. Harris. Of course the specimen in the collection is a typical | 
one, and agrees with the type of C. lateralis Burm., now in my col- | 
lection, as stated in the Synopsis and by Baron De Selys Long- 
champs, l. c., p. 36. I preferred to use Prof. Burmeister’s name in 
my Synopsis, assured by his type, and in the case of this species, as 
in some others, it is difficult to settle the question of priority. Prof. 
Burmeister’s book has on the title page 1839, but at this time it was 
the common practice in Europe to postdate all books. I cannot 
decide if it was done iff this case, and Iam sure that J did not see 
the book before 1839. Say’s paper was published in 1839, and prob- 
ably simultaneously with Burmeister’s. The fact that the former 
was read in 1836 gives the author’s names no claim to priority. 
M. le Baron De Selys Longchamps agrees, 1. ¢., p. 38, with my 
doubts about the difference between C. cynosura and C. semiaquea 
Burm., and he adds, — “ et je pense quil sérait préférable de ne les 
considérer que comme deux races.” I have seen C. cynosura from 
Massachusetts, Ohio, Iinois, Pennsylvania, Louisiana, Florida, and 
C. semiaquea from Massachusetts, District of Columbia, Georgia, 
South Carolina, Florida. C.semiaquea is the Tetragoneuria semiaquea 
Syn., 140, 1, and TJ. diffinis Syn., 141, 3, is only a variety of-it, ac- 
cording to Baron De Selys Longchamps, as well as C. complanata 
Rbr. 
The variation in size, color and basal spot of the wings is consider- 
able, and a careful study of the species a decided necessity. 
27. Cordulia lepida De Selys l. c., p. 30, No. 14. 
No. 79. , Randal, Stow, Mass. 
This interesting new species seems not very rare, and is known 
now from Maine, Massachusetts, New York, New Jersey, Maryland. 
