March, I9I7-] LenG : NeW VaRIETY OF ScAPHINOTUS. 35 



in 1899 figures of three forms of ridingsii from Virginia, Pennsyl- 

 vania and Tennessee, and called attention to the narrower form and 

 finer punctuation of the typical form. Dr. Hang Roeschke in his 

 Monograph of the tribe Cychrini^ cites Liebeck's article but includes 

 without discrimination the localities Pa., Va., W. Va., Tenn., con- 

 tenting himself with the remark that the Tennessee form " seems from 

 the figure to be unusually large, broad and compact."" 



Recently Mr. W. S. Fisher of the U. S. National Museum, has 

 sent me four specimens of the Pennsylvania form ; there is another 

 in the collection of the American Museum, and about forty in the 

 collection of Mr. G. W. J. Angell of New York, all, I believe col- 

 lected by Mr. T. N. Brown, of Uniontown, Fayette Co., Pa. From 

 correspondence with Mr. Brown I learn that they have been taken in 

 the deep gorges running back into Chestnut Ridge, the most western 

 ridge of the Allegheny mountains and especially in one restricted 

 locality in a deep, heavily timbered valley, where several species of 

 snails are plentiful. Six were found under one small stone engaged 

 in feeding on small snails and frequently the beetles clung to their 

 food until transferred to the killing bottle. Other localities from 

 which specimens of this form have been seen are Charleroi, Wash- 

 ington Co., Pa., and Wall, Allegheny Co., Pa.; all these localities are 

 in a region west of the mountain divide and drained by the Monon- 

 gahela River, the waters of which reach the Gulf of Mexico, through 

 the Ohio and Mississippi, while the waters of the Potomac reach the 

 Atlantic Ocean. The divergence in the Cychrini caused by the faunal 

 boundary of the Allegheny Mts., which has already^ been pointed out 

 in the variations of several other species is therefore again illustrated 

 by these two forms of ridingsii, the typical form occurring in the 

 Potomac valleys and the other form, which I propose to call variety 



5 Ann. Mus. Hung., 1907, p. 150. 



6 It may be noted that Dr. Roeschke does not include Bland's 1864 refer- 

 ence in his bibliography and quotes the length 12.5 mm., given by Horn without 

 investigation. Dr. Henry Skinner has kindly remeasured the specimens in 

 the collection of the Amer. Ent. Soc. which include Bland's type and Horn's 

 specimens, and writes me "the type from Virginia measures 15 mm. . . . the 

 other four measure 17, 17, 18, and 18.5 respectively." As Horn's measure- 

 ment was made from the latter, it may be stated with certainty that his " 12.5 

 mm." is simply a typographic error for 17.5 mm. 



T JouRN. N. Y. Ent, Soc, XXH, 1914, p. 139. 



