NORTH AMERICAN NEUROPTERA. 235 



has on the dorsal crest at the base of 7 and 8, a small yellowish streak. Appen- 

 dages similar, inferior (PI. x, fig. 3) as in proxhnn. PI. x, fig. 14, shows side view 

 of hamulus; the end 6 with strong bristles. The "piece anterieure" is without 

 any tubercles. 



I do not know the female. The only female from Reno belongs 

 to intada f 

 11. Lieuvorhinia iiitacta Hagen. 



\_Diplax intada Hagen, Syn. Neiir. N. Am. p. 179, 1861. 



Walsh, Proc. Acad. Phila., 1862, p. 400. 

 Leucorhinia intada Hagen, Proc. Bost. Soc. Nat. Hist., xviii, p. 

 78, 1875. 

 Calvert, Trans. Amer. Ent. Soc. xvii, p. 39, pi. v, figs. 1, 7, 8, 

 9, 1890.] 



Canada; Maine; Massachusetts; [Pennsylvania] ; Ohio ; Illinois ; 

 Michigan ; Wisconsin ; [South Dakota] ; Nevada ; Washington 

 (State). 



This species varies much in size and color. 



Among the forty-seven males just carefully examined, the labium 

 is entirely black only in five specimens. It is more or less white in 

 the other forty-two specimens. In one-third of these forty-two the 

 labium is black with the external half of the lobes white (PI. x, fig. 

 15A) in another third, only the ajjical half of the external half of 

 the lobes is white (fig. 15B) ; in the remaining third the white spot 

 is smaller, usually not reaching the tip of the lobe (fig. 15C), and less 

 well defined, sometimes even to be recognized with difficulty. The 

 five males with black labia are all from different localities, East or 

 West, or Middle States, and from the same localities with the white- 

 marked ones. I collected in Massachusetts, on the same day and at 

 the same place, males with entirely dark labia and also those with 

 the outer half of the lobe white. Further, the black ones do not 

 belong to older specimens. Indeed, the half white ones are as old as 

 the others. But the young males with colors not yet complete, have 

 labium and lobes pale throughout. 



The labrum is white, but sometimes more or less blackish in the 

 middle. 



On the abdomen, even of very dark males, a twin yellow spot is 

 usually visible on segment 7. 



Inferior appendage of the male widely emarginate, bifid (fig. 6) ; 

 it varies much, as it is more or less emarginate, its branches more or 

 less diverging and more or less pointed (I had formerly called such 

 an exaggei'ated form L. spilosa). 



The male has on each side of the '' piece anterieure" of the second 

 segment [anterior lamina], an oval, elevated, black tubercule, flat, en- 



