REHN AND HEBARD 67 



Rock Creek, District of Columbia, V, 28, 1905, (D. H. demons), 1 juv. 9, 

 [U. S. N. M.]. 



Arlington, Virginia, VI, 9, 1914, (H.; taken at night with flash-lamp), 

 3 d^,5 9. 



Fairfax County, Virginia, VI, 1911, (W. T. Davis), 1 9 , [Davis Chi.]. 



Great Falls, Virginia, VI, 16, 1910, (W. T. Davis), 1 cf , [Davis Cln.]. 



FaUs Church, Virginia, VI, 24, 1915, (C. T. Greene), 1 9, [U. S. N. M.]. 



Green Dell Farm, two miles west of Pohick, Fairfax County, Virginia, 

 VIII, 25, 1912, 1 d", [U. S. N. M.]. 



Orkney Springs, Virginia, (G. W. Hiflebower), 1 9 , [U. S. N. M.]. 



Stony Man Mountain, Virginia, (Miss Pollock), 1 juv. 9; VII, 28, 1912, 

 (H. G. Dyar), 1 9, [U. S. N. M.]. 



Orange, Virginia, VII, 21, 1913, (R. & H.; in dead leaves and scattered 

 green undergrowth in chestnut forest), 5 cf , 8 9 , type, allotype and paratypes, 

 [Hebard Cln. and A. N. S. P.]. 



Hot Springs, Virginia, IX, 6, 1914, (Henry Fox), 1 cf , [Fox Cln.]. 



Addison, Virginia, VIII, 27, 1914, (A. N. Caudell), 1 9, (U. S. X. M.]. 



Leetonia, Ohio, VII, 20, 1892, (H. G. Wolfgang), 1 9 , [U. S. X. M.]. 



Lawrence County, Indiana, VII, 15, 1903, (W. S. Blatchley), 1 9, [Hebard 

 Cln.]. 



Wyandotte, Indiana, VIII, 1905, (A. X. Caudell), 1 cf, 1 9, [U. S. X. M.]. 



Keokuk, Iowa, VII, 19, 1913, (M. P. Somes; near rocks in timber at foot of 

 bluff), 1 9, [Somes Chi.]. 



This species has been recorded by Mead as A. dorsalis from Ohio. 



Atlanticus monticola Davis (PI. VI, figs. 10, 11 and 12; pi. VII, figs. 4, 



13 and 22; pi. VIII, figs. 6 and 14.) 

 1911. Atlanticus pachymerus Rehn and Hebard (not Dcdicus pachymerus 



Burmeister, 1838), Proc. Acad. Xat. Sci. Phila., 1910, p. 644. [.Jones' Knob, 



Xorth Carolina.] 

 1915. Atlanticus monticola Davis, Bull. Brooklyn Entom. Soc, ix, p. 104. 



[Lake Toxaway (t3^pe locality). Valley of the Black Mountains, Black 



Mountains, Balsam, Linville and Jones' Knob, Xorth Carolina; Pinnacle 



Peak and Claj^ton, Georgia^*.] 



This interesting form, which has quite a circuniscri])cd range, 

 is a close relative of davisi, agreeing in the general form and pro- 

 portions, in the character of the tegminal development of the 

 male, in the general form of the male cerci and in the type of the 

 subgenital plate of the female, showing far greater afFmity with 



-* Of the two immature males and one immature female from Clayton, 

 Georgia, referred to this species by Davis, we are able to assign positively 

 only the males. Of the females in this condition seen from that locality, all 

 which can be identified with certainty are referable to americanus. Immature 

 specimens of this genus are extremely hard to determine as many of the impor- 

 tant features of diagnostic value are obscured or not fully revealed until the 

 mature condition is reached. 



TRANS. AM. ENT. SOC. X 



