94 Bulletin of the Brooklyn Entomological Society Voi. viii 



in the possession of a half-antenodal cross vein just before the 

 nodus. ... I leave it here in the genus Dorocordulia beside the 

 two species with which it has hitherto been associated." 



The New Jersey specimen proved to be the lintneri of Hagen, and 

 Mr. E. B. WilHamson has since kindly checked up my determina- 

 tion. The genus Dorocordulia in which this species has been 

 placed has the triangle of the fore wing open, subtriangle of hind 

 wing not present, also veins M4 and Cul in the fore wing approx- 

 imated toward the margin of the wing. These characters are good 

 for Dorocordulia lepida and Dorocordulia libera, but will not cover 

 lintneri, which has the triangles open in the specimen in question, 

 subtriangles of hind wing absent, but veins M4 and Cul are 

 separated much as in Neurocordulia, that is the number of cells 

 between them increases toward the margin of the wing. 



As to whether the triangles of the fore wings have cross veins or 

 are without them must not be considered of too great importance, 

 for a series of thirteen specimens of the allied Helocordulia uhleri in 

 the author's collection may be arranged as follows: 



5 cf , 2 9 with cross veins in both the triangles and subtriangles. 



1 d' with triangles open, but a vein in each of the subtriangles. 



1 d' with cross veins in both triangles and subtriangles in the left 

 wing, while the right wing has the triangles open. 



2 cf with both the triangles and subtriangles open. 



1 9 with triangles open but cross veins in both subtriangles. 



1 9 with cross veins in both triangles in the right wing, while the 

 left wing has the triangle open and a cross vein in the subtriangle. 



According to Dr. Hagen, Psyche, 5, p. 373, 1890, the unnamed 

 figure 1, Plate 16 in Emmons's account of the More Common and 

 Injurious Species of Insects of the State of New York, is his Cord- 

 ulia lintneri. This figure distinctly shows a cross vein in each 

 of the triangles of the fore wings. Later in the same article Dr. 

 Hagen says of Cordulia lintneri, "The position of this rather 

 eccentric, small species is near C. uhleri, but it is separated from 

 that species by unusual characters. The anal angles of the hind 

 wings of the male are nearly rounded; all triangles are without 

 transversal veins; only one series of discoidal cells, and a very 

 plain venation." Dr. E. P. Felt has kindly examined the male 

 type of lintneri Hagen in the State Museum at Albany, N. Y. and 

 states that "there are no cross veins in either triangles or sub- 



