20 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 113 
light. The five species of Deltotaria examined show no trace of setal 
sockets, a fact that makes the genus unique among those known to 
me. 
Except for small and almost intangible details of form and texture, 
the various species of Deltotaria are very similar in external appear- 
ance. ‘This condition, typical of most related genera as well, directs 
Ficure 3.—Left gonopods, in mesal aspect, of two species of Deltotaria: a, D. lea, holotype 
from Lincoln County, N.C.; b, D. philia, holotype, from Clarkesville, Ga. (figure from 
Chamberlin, 1949). Figure 3a drawn to same scale as Figure 2, a, b, and d. 
most of our attention to the form of the gonopods in a search for 
taxonomic characters at the species level. 
Several details of body form, such as the submarginal pleural 
groove noted in the description of D. brimlew, deserve further atten- 
tion and confirmation as valid characters. Some of the species are 
obviously more vaulted than others (that is to say, the paranota are 
obviously more depressed and continue the convexity of the dorsum), 
but this variable needs to be defined on the basis of a statistical study 
when more specimens are available. 
