REVISION OF BORARIA AND GYALOSTETHUS — ^HOFFMAN 331 



within the species Boraria media. In one phase, the medial edge of 

 the telopodite (as seen in dorsal aspect) is convex at the base of the 

 prefemoral process, as indicated by the arrow in figure 10. In the 

 other phase, this same edge is distinctly concave in profile, as shown 

 in figure 9. These differences do not show up when the gonopod is 

 viewed in mesial aspect. The two gonopod types essentially are 

 geographically vicarious, type 1 being peripheral, type 2 central (fig. 

 12). In a general way, there is some coincidence in the distribution 

 of gonopod types and body form. But as the maps show, there is 

 not a very close concordance in the northern part of the range. At 

 one locality (Mount Mitchell), both gonopod types occur. There 

 seems to be some sort of differentiation going on within this species, but 

 I do not think that we are justified for the present at least in recog- 

 nizing even subspecies of B. media. If a distinction were to be made 

 on gonopod form alone, type 1 would represent the nominate form, 

 tjrpe 2 would carry the name B. geniculata. But the magnitude of 

 the difference is certainly of a low order and hardly sufficient for the 

 basis of subspecific names. 



Color pattern variations: The normal coloration in this species 

 is that described in a preceeding paragraph: the dorsum dark brown 

 to blackish, with reddish or pink paranoial spots. Occasionally the 

 dorsum is lighter brown, with the spots more orange; in a few speci- 

 mens, chiefly those which recently have moulted, there is a tendency 

 for the metatergites to have a light transverse caudal stripe. Such 

 specimens are sporadic and have been seen at various parts of the 

 range (Roan Mountain, Grandfather Mountain, Soco Gap) and have 

 no systematic or nomenclatorial significance. 



Synonymy. — Nannaria media was described without illustrations 

 of the gonopods and fell into complete obscurity. In 1949 I examined 

 the tjrpes at Harvard and discovered that the species is not congeneric 

 with Nannaria minor, described in the same paper, but that it is 

 congeneric with Boraria stricta. Subsequently, through the kind 

 cooperation of Dr. Chamberlin, I examined the male type of B. 

 geniculata and found it to agree in aU essential respects with that of 

 B. media. 



Biological notes. — Specimens of B. media have been collected 

 from April to September, but this period obviously represents the 

 active season of collectors rather than the milliped. I have collected 

 B. media at about six localities and am unable to make any generaliza- 

 tion about habitat preferences. On Roan Mountain, specimens were 

 abundant under stones near the edge of grassy fields; elsewhere I have 

 found the species under logs in oak woods, in the leaf litter in laurel 



