Dep PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 118 
forms, and in lea this development is provided with a small acute 
spine. 
The distal end of the telopodite is modified in all of the species, 
but through a considerable range of form. The simplest occurs in 
philia, where the end is only very slightly expanded, with a vague 
subterminal angle on the inside of the arc, the angle imparting a 
somewhat hastate shape. D. lea has the telopodite apex more 
expanded and laminate. In mariana most of the terminal expansion 
is caused by a broad lobation on the outer side of the subterminal 
arc; distad to this broad area the solenomerite is rather abruptly 
recurved. This general form is elaborated by brimleardia in which 
a subterminal lobe or process (labeled ‘B” on the drawings) occurs. 
Process B becomes even more distinct in brimleii, and the solenomerite 
is recurved to the extent of being directed toward the tip of the 
process. Finally, in tela, the end of the telopodite is rather broadly 
expanded and somewhat twisted so that the lobe presumably 
homologous with B is located on the outer edge of the gonopod are 
instead of on the inside as in the other two species. 
It is certainly premature to attempt groupings of species beyond a 
few obvious cases of affinity, and no effort is made to arrange either 
the key or sequence of species to reflect phylogeny. The preceding 
allusion to changes in the gonopods, of course, does not imply a linear 
evolutionary sequence within the genus, although I do not think that 
the homogeneity of Deltotaria is open to question. 
With females of only two species available, I have made no attempt 
to utilize the cyphopod structure other than to establish its general 
resemblance to the form occuring in related genera. 
Genus Deltotaria Causey 
Deltotaria Causey, 1942, p. 165.—Chamberlin and Hoffman, 1958, p. 29. 
Phanoria Chamberlin, 1949, p. 101 (type species, P. philia Chamberlin, by 
original designation). 
Typrr species: Deltotaria brimleit Causey, by original designation. 
Diacnosis: A genus of aphelorine xystodesmids with the following 
characteristics (diagnostic features given in small capital letters): 
Head smooth and polished, the vertigial groove terminating in a 
very faint and shallow, but occasionally punctuate depression; FRONS 
AND VERTEX WITHOUT CRANIAL SETAE; antennae slender and long, 
extending caudad to posterior edge of third tergite, with four sensory 
cones; genae swollen, without or with only a very faint median 
depression. 
Paranota moderately developed, typically depressed and continuing 
slope of dorsum, peritremata not strongly set off except on caudalmost 
segments; ozopores normal in distribution and position, opening on 
