NO. II LARVAE OF THE ELATERID BEETLES — GLEN 185 



i; Taber, Alberta; June 6, 1935; adult emerged Jan. 31, 1936; R. Glen and 



G. F. Manson. (C.N.C.) 

 2; Turtleford, Saskatchewan; June 10, 1937; i adult emerged Aug. 3, 1937; 



J. V. Brooks. (C.N.C.) 



C. sanhorni Horn: Twenty specimens were studied, all from 

 Churchill, Manitoba. A reared adult was identified by W. J. Brown, 

 of Ottawa. 



20; Churchill, Manitoba; June and July 1937; i adult emerged in July 1937; 

 W. J. Brown. (C.N.C.) 



CRYPTOHYPNUS FUNEBRIS Candeze 

 Figure 38, d, f 



This western species is distinguished by the numerous denticles 

 on nasale and subnasale (fig. 38, (/), and by the frontoclypeal area, 

 which is bluntly pointed posteriorly. The caudal notch is U-shaped 

 and is not narrowed posteriorly. The urogomphi have the inner prongs 

 longer than the outer prongs but less than twice as long. The setal 

 pattern on abdominal mediotergites is given in figure 38, /. Larvae 

 of this species are larger than other known Cryptohypnus, those at 

 hand measuring about 16 mm. in length. 



Material used in study. — Only 2 larvae were available for ex- 

 amination. These were collected, along with adults of this species, 

 at Walla Walla, Wash., by M. C. Lane, and identified by him. It is 

 not known that larvae of this type have actually been reared to adults, 

 but Mr. Lane has expressed his confidence in the identification made. 

 (U.S.N.M.) 



CRYPTOHYPNUS ABBREVIATUS (Say) 



Figure 38, a, c, e, g 



This species is widely distributed in the eastern United States and 

 from Newfoundland as far west as Saskatchewan. It is an important 

 pest in fields and gardens. The larva differs from other known 

 Cryptohypnus in having the urogomphal prongs (fig. 38, e, g) sub- 

 equal ; the caudal notch subcircular, or transversely subovate, and con- 

 siderably narrowed posteriorly; the subnasale (fig. 38, c) with about 

 7 or 8 denticles ; and the frontoclypeal area (fig. 38, a) rounded poste- 

 riorly. The lateral denticles of nasale are sometimes eroded, giving 

 the appearance of a unidentate structure. Fully distended mature 

 larvae measure up to 12 mm. in length. 



