142 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



Urogomphi (ur, fig. 26, /; fig. 26, e) separate, bifid ; projecting 

 caudad or dorsocaudad ; prongs subequal in length. Inner prong (ipr) 

 broad, much stouter than outer prong ; directed caudomediad ; heavily 

 sclerotized along anteromedial margin ; bearing 2 long unpaired setae, 

 I on caudolateral aspect near junction with outer prong, other 

 slightly farther ventrad. Outer prong (opr) subcylindrical, narrow- 

 ing toward tip, which is bluntly rounded ; usually slightly shorter than 

 inner prong ; projected caudodorsad, usually slightly laterad ; promi- 

 nent tubercle ventrolaterally at base of prong; with 2 large setae, 

 I on anteromedial aspect, about halfway along prong, other arising 

 from upper aspect of base of tubercle. Undivided part of urogomphus 

 broad, with prominent seta ventrally near base. 



Caudal notch (en) small, subcircular, almost closed by converging 

 inner prongs. 



Tenth abdominal segment with whorl of 10 fine setae and usually 

 additional smaller hairs ; anal aperture linear and median. 



Material used in study. — Forty-two examples, including the exuviae 

 of five reared specimens, were examined. One larva was collected at 

 Elkwater Lake, Alberta ; the others were all collected in Saskatchewan. 

 W. J. Brown, of Ottawa, identified the reared adults. All material 

 is in the Canadian national collection. The following notes refer to 

 separate collections for which there are associated reared adults. 



9; Saskatoon, Saskatchewan; June 21, 1930; 3 adults emerged July 28, July 29, 



Aug. I, respectively; R. Glen. 

 3 ; Cypress Hills, Saskatchewan ; July 18, 1935 ; 2 adults emerged Aug. 4 and 



Aug. 8; R. Glen. 



LUDIUS SJAELANDICUS (Miiller) 



Figures 14, /; 27 



Elater sjaelandicus Muller, Fauna Insectorum Friedrichsdalina, p. 21, 1764. 

 Elater tessellatus Fabricius (nee Linnaeus), Systema Eleutheratorum, p. 211, 



1775- 

 Corymhites tessellatus (Fabricius), Candeze, Monographic des elaterides, vol. 4, 



p. 104, 1863. 

 Corymbites sjaelandicus (Miiller), Schiodte, Naturh. Tidsskr., ser. 3, vol. 3, 



p. 554, 1865. 

 Corymbites (Actenicerus) sjaelandicus (Muller), Schenkling, Coleopt. Cat. 



(ed. Junk), vol. 2, pt. 88, p. 368, 1927. 

 Ludiiis sjaelandicus (Miiller), Van Dyke, Proc. California Acad. Sci., vol. 20, 



P- 391, 1932. 



This species is well known in northern and central Europe and in 

 Siberia. According to Leng (1920, p. 169) and Van Dyke (1932, 



