1932 ] 
A Wireworm Double Monster 
37 
canadensis seems to have fortunately been passed over 
without being standardized into conformity with the last 
catalogue. 
In the following list of works consulted, the asterisk in- 
dicates use of the valid prior name ( canadensis Latreille 
1810) instead of its synonym ( bicolor Newman 1837). 
*1810 Latreille, Consid. General.— Crust. Arach. Ins. Paris, 
p. 212, 430. 
*1825 Lepeletier & Serville, Encyl. meth., Ins., vol. 10, p. 
169, 261. 
1837 Newman, Ent. Mag., vol. 5, p. 375. 
*1853 Melsheimer, Cat. Coleop. U. S., p. 148. 
*1855 LeConte, Proc. Acad. Nat. Sci. Phila., vol. 7, p. 275. 
1859 Lacordaire, Gen. Coleop., vol. 5, p. 603, footnote 3. 
*1866 LeConte, List Coleop. N. A., p. 64. 
1870 Gemmiger & Harold, Cat. Coleop., p. 2104. 
*1874 Crotch, Check List Coleop. Am. N. of Mex., p. 109. 
*1885 Henshaw, List Coleop. Am. N. of Mex., p. 129. 
1914 Blair, Ann. Mag. Nat. Hist., Ser. 8, vol. 13, p. 313. 
1920 Leng, Cat. Coleop. Am. N. of Mex., p. 161. 
1928 Blair, Coleop, Cat., Junk, pt. 99, Pyrochroidae, p. 2. 
*1931 Payne, Ent. News, vol. 42, p. 13-15. 
A WIREWORM DOUBLE MONSTER (LIMONIUS 
CANUS LEG., ELATERIDiE, COLEOPTERA) 
By Chas. E. Woodworth 
Associate Entomologist, Division of Truck Crop Insects, 
U. S. Bureau of Entomology 
Quite recently it was my good fortune to find and pre- 
serve an interesting monstrosity among some newly 
hatched wireworm larvae. In the course of examining 
about eighteen thousand of these, only one abnormal in- 
dividual was noted. Besides the great scarcity of anomalies 
in this group the fact that wireworms are of subterranean 
