NO. II LARVAE OF THE ELATERID BEETLES GLEN 8l 



slightly dorsad, with short, sharp, upturned, horny tip ; small tubercle 

 on lateral aspect, slightly over half distance toward tip of prong; 

 2 prominent setae, i from base of tubercle and i from midventral 

 surface of prong ; sometimes i minute seta on ventral aspect anterad 

 to large seta. Outer prong {opr) projecting caudodorsad (at an 

 angle of about 45° to 50° with the inner prong) sometimes slightly 

 laterad, terminating in a smooth, round, horny tip ; small tubercle on 

 midventral aspect of base; 2 prominent setae, i from base of tubercle 

 and I projecting upward from upper surface of prong about two- 

 thirds distance from base; usually a few minute setae on inner surface 

 of prong toward tip. Undivided part of urogomphus with i large seta 

 ventrally just anterad to junction of prongs. 



Caudal notch {en) large, U-shaped, anterior margin sometimes 

 slightly notched. 



Tenth abdominal segment with whorl of 10 fine setae ; anal aper- 

 ture linear and median. 



Material used in study. — Fifty-one examples were examined, in- 

 cluding the last larval exuviae of seven reared specimens. The reared 

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

 including the adults, is stored in the Canadian national collection. 

 All specimens examined were directly associated with reared examples. 



43; Cypress Hills, Saskatchewan; June 3, 1934; specimen i6407-8iN4(a) reared 



to adult, emerging in July 1934 ; R. Glen. 

 4; Cypress Hills, Saskatchewan; July 3, 1932; all reared to adults; H. 



McMahon and H. McDonald. 

 2; Elkwater Lake, Alberta; June 8, 1935; specimen i6407-8iN5(a) emerged 



July 22, 1935 ; R. Glen. 

 I ; Cascapedia River, Quebec ; reared adult emerging Aug. 26, 1935 '■> M. L. 



Prebble. 

 i; Golden Lake, Ontario; July 7, 1939; adult emerged Aug. 26, 1939; A. P. 



Arnason. 



LUDIUS NEBRASKENSIS (Bland) (?) 



Figure 18, e 



Corymbites nebraskensis Bland, Proc. Ent. Soc. Philadelphia, vol. i, p. 355, 



1863. 

 Ludhis nebraskensis (Bland), Brown, Canadian Ent., vol. 68, p. 106, 1936. 



Brown (1936b, pp. 106-107) records this species from Montana 

 and British Columbia. On the basis of adult characters, this author 

 finds that nebraskensis (Bland) has been confused in collections with 

 triundulatus (Randall) and tigrinus (Fall). The larva that has been 

 considered as nebraskensis in the present study was reared from eggs 

 obtained from adults collected in Washington State and identified by 



