148 CURRIE [ 2I 8] 



singly cannot always be determined with certainty. The following 

 description of the specimen is given for future reference : 



Length 34 mm.; abdomen 26; hind wing 20.7; pterostigma 1.7. 

 Blackish-brown. The following parts are pale yellowish, viz : under 

 parts of head, lips, genae (except a few spots), rhinarium, tips of two 

 basal joints of antennae, mid-dorsal thoracic carina, humeral stripe 

 (which is wider below), sides of thorax inferiorly (except 2d lateral 

 suture above and some spots near coxae) , and venter of thorax (except 

 middle line which is wider behind) . Abdomen yellowish, marked above 

 with dark metallic green as follows : on segment i , a narrow longitudinal 

 median line, widening behind, and divided into two large divaricate 

 spots ; on 2, a mid-dorsal band, divided by a median line which is widened 

 in front, the band widened and orbicular posteriorly (enclosing a pale 

 spot on either side) and connected with the dark apical ring by a short 

 stalk ; 3-5 similar, but the dividing line uniformly narrow, the band 

 forming a point anteriorly and barely reaching the base ; 6 without 

 posterior pale spots, the bands otherwise as in 3-5 ; on 7 and 8 the 

 band is wider, not separated, not stalked behind; on 9 and 10 they 

 narrow posteriorly; the bands on 6 10 are blackish-brown, hardly 

 metallic. Sides of abdomen with indistinct dark markings, these 

 principally apical. Venter dark. Tenth segment with its apical 

 margin triangularly notched above, scarcely elevated. Anal append- 

 ages two-thirds the length of 10, conical, pale, black on apical half. 

 Genital valves pale, their edges dark apically and minutely denticulate ; 

 valvular processes dark, about as long as appendages. Legs pale, the 

 femora without, tibiae within, and the tarsi, black. Pterostigma 

 brown. 



ENALLAGMA CALVERTI Morse. 



Enallagma calverti MORSE, Psyche, vn, No. 227, p. 208, March, 1895. 

 (Male described.) WILLIAMSOM, Ent. News, xi, No. 5, p. 455, text fig. 

 b, PL IX, figs. 5, 9 and 10, May, 1900. (Female described and male ap- 

 pendages figured.) 



Kukak Bay, June 29- July 5 ; Cook Inlet, July 2 1 ; Kadiak, July 

 20 ; Juneau, July 25 : thirty-three males and nineteen females. 



These specimens average larger than those I have seen from the 

 United States: Length, $ 30.7 mm.-35 mm., 9 31 .5-35.6 ; abdomen 

 $ 24-27.3, 9 24.8-27.3; hind wing $ 18.7-21.8, 9 20-22.2. In the 

 markings of head, thorax, and abdomen they agree fairly well with E. 

 cyathigerum (Charpentier) as described by Selys 1 and exhibit similar 

 variations in the shape and extent of the dorsal abdominal markings, 

 as follows : 



1 Bull. Acad. Belg. (2), XLI, p. 505, 1876. 



