102 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



of inner prong, 2 or 3 setae laterad to depression and anterad to base 

 of outer prong. 



Caudal notch (en) large, U-shaped; as long as wide or longer than 

 wide ; usually not narrowed posteriorly. 



Tenth abdominal segment (lo) with 20 or more setae in irregular 

 whorl around distal end; anal aperture somewhat T-shaped with 

 transverse portion to the rear. 



Material used in study. — "Eastern species" : Eight examples of this 

 species were examined, including two larval exuviae that were believed 

 to be associated with reared adults, but the adults were not available. 

 These larval skins were ffOm specimens collected at Mont Alto, Pa., 

 January 25, 1931, J. N. Knull ; apparently identified by Knull ; (Penn- 

 sylvania Agricultural Experiment Station collection). The whole 

 larvae examined were from Pennsylvania (4), New York (i), and 

 Maryland (i) and are deposited in the U. S. National Museum. 



"Western species" : Seven examples, including one larval exuvium 

 of a reared specimen, were studied. Unfortunately, the reared adult 

 could not be found. This specimen was from Colony Mills, Sequoia 

 Park, Calif., July 15, 1918; adult found in bottom of rearing cage 

 September 29, 1919; F. C. C. (U.S.N.M. Hopk. U.S. 10652b). The 

 whole larvae examined were from Oregon (3) and California (3) 

 and are deposited in the U. S. National Museum. 



LUDIUS SULCICOLLIS (Say) 



Figure 21, c, d 



Elater sukicollis Say, Trane. Amer. Philos. Soc, vol. 6, p. 168, 1836. 

 Corymbites sulcicollis (Say), LeConte, Trans. Amer. Philos. Soc, new ser., 



vol. 10, p. 441, 1853. 

 Liidius sulcicollis (Say), Van Dyke, Proc. California Acad. Sci., vol. 20, 



p. 400, 1932. 



Van Dyke (1932, p. 400) indicates that this species is distributed 

 throughout the Atlantic States, and Leng (1920, p. 169) records it 

 as far inland as Indiana. 



The larvae are reported by Knull (1930, p. 83 ; 1932, p. 43) to in- 

 habit decaying wood of sour gum (Nyssa sylvatica) and pitch pine 

 {Pinus rigida) and hibernating adults have been taken by Blatchley 

 (1910, p. 768) from under the loose bark of an ash snag. Knull 

 (1932, p. 43) found an adult in its pupal cell on August 16, which 

 suggests that the time and period of pupation are similar to those of 

 most species of Ludius. 



