Vol. XXlv] ENTOMOLOGICAL NEWS 3! I 



Some years previous to 1908 I had ascertained the presence 

 of another species of this genus in the United States and had 

 noted the principal characters distinguishing it from Irene, 

 gracilis and spcciosa. On this basis, I included in my notes, 

 furnished to the late Prof. John B. Smith in 1909, for the 

 List of New Jersey Insects then in preparation, the record 

 of one female from Malaga, N. J., June 27, 1908, by Mr. 

 V. A. E. Daecke as Xehalennia intcgricollis Calv.* My ab- 

 sence for a year in Costa Rica speedily followed and the pub- 

 lication of the description of integricollis was forgotten, so 

 that the name has remained a noincn nnduin. A recent in- 

 quiry by Mr. W. T. Davis as to the place of description has 

 recalled the matter to my mind, hence the present paper. 



The species of Nehalennia are summarized in the follow- 

 ing synopsis: two of them, atrinuchalis Selys and selvsii 

 Kirby (Cat. Odon., 1890, p. 147, for sophia Selys 1876; nee 

 sophia Selys 1840 == spcciosa Charp., 1840), are known to me 

 by descriptions only. 



I. Hind margin of prothorax convex, entire or nearly so $ $ . Super- 

 ior appendages $ longer than inferiors. 



Thoracic dorsum dull metallic green reaching laterad to beyond 

 the humeral suture, with reddish humeral and antehumeral 

 lines. Three antenodal cells. $ Abd. segs. 8 and 9 blue, 10 

 black dorsally, its hind margin broadly and shallowly concave ; 

 superior appendages subconical, a little recurved toward each 

 other as if compressed. $ Abd. segs. 8 and 9 bronze 

 dorsally. Abd. male 20-22, female 22; hind wing, male 13, 

 female 1(1 mm. (From de Selys' description.) . .atrinuchalis 

 Thoracic dorsum metallic green to beyond the humeral suture 

 which often has a short pale stripe on its upper and another 

 on its lower end. Three antenodal cells. $ Abd. seg. 8 dark 

 metallic blue or metallic green with a pale blue mid-dorsal 

 *pt)t on the posterior third to half and the sides inferiorly pale 

 blue ; 9 chiefly pale blue, a broad dark metallic green or 

 metallic blue band each side in proximal two-thirds; 10 pale 

 blue, its hind dorsal margin cleft in the middle, a short process 

 directed upward and caiulad on each side of the cleft, each 

 process spinulose at tip, margin otherwise not spinulose ; super- 

 ior appendages increasing in thickness to the apex when seen 



* Ann. Rep. N. J. State Museum nxxj, p. 75. Trenton, N. J. 1910. 



