16 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 118 
including descriptions of two new species and some remarks on the 
status of others, will be useful to other workers interested in xystodes- 
mids. The present paper constitutes the fifth in a series of generic 
synopses within this family of diplopods. 
MATERIALS AND METHODS 
The methods of study outlined in previous parts of this series 
have been generally followed and do not require explanation. A 
departure from the usual procedure in illustration occurs in the 
orientation of the gonopods. In general the mesial aspect shows 
most of the important structures in xystodesmid gonopods; in Delto- 
taria, however, a ventrolateral aspect of the gonopod—as it would 
be seen in situ—reveals diagnostic features best and has been adopted 
for this particular case, although the gonopods have been removed 
from the specimens and cleared of muscle tissue so that the coxa 
and the sternal apodeme could also be shown. Fortunately, the gono- 
pods of the two species that I was unable to personally study have 
also been illustrated from this aspect and permit a satisfactory 
comparison of figures. 
The type specimens of three species, D. brimleii, brimleardia, and 
tela, are in the collection of the Academy of Natural Sciences of 
Philadelphia (ANSP), and I am very much indebted to James A. G. 
Rehn and Harold J. Grant, Jr., for the opportunity to study them. 
The holotype of D. philia is in the personal collection of R. V. Cham- 
berlin at the University of Utah, but has been temporarily misplaced 
and thus is not available for examination. Types of the two new 
species here described are in the U.S. National Museum. Thus, of 
the six forms which are recognized in the genus, I have seen the types 
of five, and have seen two of the species in life. It is once more a 
pleasure to express my thanks to Leslie Hubricht, who obtained 
specimens of both of the new forms and most generously donated 
them to me (RLH). 
REVIEW OF THE LITERATURE 
Deltotarva was not proposed until 1942, when the genus and its 
type species brimlewt were defined by Nell B. Causey, who pointed 
out the general affinity of the genus with Apheloria. The original 
description is short, but concise and generally satisfactory. The 
type specimens of brimleii were from Swannanoa, North Carolina. 
Several years later, R. V. Chamberlin (1947) published the descrip- 
tion of a second species from North Carolina which he named Delto- 
teria nigrimontis. Allocation of this species to Deltotaria was pre- 
sumably made on the basis of the telopodite shape, which is similar 
to that of brimlew. In other respects the gonopods of the two are 
