222 CURRIE 



due to difference in age ; the majority of the males are reddish-brown 

 and of the females, yellow. There is considerable variation, also, in 

 the extent of the basal spots of anterior and posterior wings ; in two 

 of the females the triangular spot of hind wings extends to the inner 

 angle of the triangle ; in two other specimens, also females, the first 

 (anterior) spot of front wings does not reach the first antecubital ; in 

 the males the first (anterior) spot of hind wings reaches not more than 

 half way to the first antecubital, except in two specimens and in 

 neither of these does it quite reach it. The dorsal abdominal spots 

 are pointed behind, not always reaching the hind margin of the seg- 

 ments. Several specimens have a small basal spot on segment 8. 

 The venation is quite irregular; 6-8 antecubitals in front wings of 

 males (regularly 7), 7 in females; 6-9 postcubitals. On posterior 

 wings, 5-6 antecubitals, 6-10 postcubitals. Two or three rows of 

 discoidal areolets on front wings. Discoidal triangles of both wings 

 free or crossed by one vein. Internal triangles free or composed of 

 two or three cells. 



This species has been recorded from Lake Winnipeg, Saskatchewan 

 River and Fort Resolution, British America, from Massachusetts, and 

 from Pictou, Nova Scotia. 



The following are notes on four species of dragon flies previously 

 reported from Alaska but of which the Harriman Expedition collected 

 no specimens. 



ENALLAGMA ANNEXUM (Hagen). 



Agrio7i annexum Hagen, Syn. Neur. N. Am., p. 87, 1861. 



Enallagma cyathigerum race atinexiim Selys, Bull. Acad. Belg. (2), xli, p. 



506, 1876. — Wadsworth, Ent. News, in, No. i, p. 8, January, 1892. 

 Enallagma annexum Williamson, Ent. News, xi, No. 5, p. 454, text fig. a, 



PI. IX, figs. 3 and 7, May, 1900. 



Distribution. — Sitka, Alaska (Hagen) ; Red River and Saskat- 

 chewan, British America; (.^) Irkutsk, northern Asia; Vancouver 

 Island; Hermit Lake, White Mountains, New Hampshire; Massa- 

 chusetts (Selys) ; Manchester, Maine (Miss Wadsworth) ; Wyoming, 

 California, and Washington (Williamson). 



^SCHNA SITCHENSIS Hagen. 



^schna sitchensis Hagen, Syn. Neur. N. Am., p. 119, 1861. — Hagen, Proc. 

 Bost. Soc. Nat. Hist., xviii, p. 33, 1875.— Kirby, Synonymic Cat., p. 87, 

 1890. — Hagen, Psyche, v, No. 170, p. 353, June, 1890. 



Distribution. — Described from Sitka, Alaska, and afterwards re- 

 ported from Saskatchewan, British America. 



