1916.] NATURAL SCIENCES OF PHILADELPHIA. 271 



Maryland. Davis; trapped in molasses jar), 



Garretl County, last week of July, H juv. 0*, 6 juv. 9. 



(W. Stone). 2 9, [A. N. S. P.]. North Carolina. 



Cabin John Run, IX, 1911, <VY. T. Black Mountain, IX, 6, 1 j\ [B. I.]. 

 Davis; trapped in molasses jar), 



7 o", 9 9, 3 juv. d*. Georgia. 



District of Columbia, VI, 1910,. (W. T. Rabun County, VII, 1910, (W. T. 



Davis; trapped in molasses jar), Davis), 2 o\ 4 juv. 9. 



1 juv. cf, 1 juv. 9 • Wilson (Jap, Rabun County, VIII, 



... . . 22, 1913, (J. C. Bradley), 3^,79. 



1 vrginm. Clayton, 2,000-3,000 feet, VI, 1909, 



Alexandria County, VI, 1910, (W. T. (W. T. Davis), 1 juv. 9 . 



We have carefully studied the original descriptions of the two 

 species here synonymized, and we are unable to separate them from 

 typical gracilipes by the presence of any invariable character or 

 characters. We have also had before us a paratype of hews, labelled 

 as such in Scudder's handwriting. 



The species gracilipes is a very variable one in certain features, 

 i.e., size, relative elongation and depth of the caudal femora and 

 spination of the same, character of the caudal tibiae and coloration. 

 The size variation, as seems to be the rule in the genus, is very con- 

 siderable, the extremes (in millimeters) of adults of both sexes from 

 Cabin John Run being: 



^^99 



Length of pronotum 5.1 6.7 6.2 7.2 



Length of cephalic femur 8.6 11.9 10 11.1 



Length of caudal femur 17.9 24.2 19.8 22.8 



Greatest depth of caudal femur 4.4 6.4 5 5.6 



Length of caudal tibia 20.6 26.4 22.2 25.2 



Length of ovipositor 10.2 14.2 



The caudal femora .seem to show some geographic correlation in 

 the variation of comparative depth to length, specimens from northern 

 Georgia showing the greatest relative depth, while more northern 

 individuals generally have the caudal femora distinctly more slender, 

 but this is by no means a rule, as northern specimens frequently have 

 as robust femora as more southern material. The male paratype of 

 heros from North Carolina has the caudal femora relatively quite 

 slender. The spination of the ventro-external margin of the caudal 

 femora of the male is extremely variable in character, ranging from 

 the relatively heavier, basally tumid, spines of typical grandis to the 

 weak and relative short type found in the paratype of heros. Between 

 those extremes we find all intermediates in the strength of the spines, 

 while the number of the same varies from as few as eight to as many 

 as sixteen. • 



The caudal tibia? are generally somewhat valgate proximad, but 



