REVISION OF BORARIA AND GYALOSTETHUS — HOFFMAN 343 



usual sexual differences of wider sterna, more highly arched tergites, 

 slightly shorter antennae. Third segment without special epigynal 

 modifications. Bases of 2nd pair of legs and cyphopods as shown in 

 figure 25 ; receptable small, valves fiat, ovate, similar in size, the outer 

 valve with evenly curved profile, the inner constricted at midlength, 

 both are densely set with long setae. A single, rounded, median 

 seminal receptacle. 



Variation. — There is no geographic variation in structural charac- 

 ters. Individually there is considerable range in size, and females 

 tend to be considerably larger than males. The largest specimen 

 measured is a female from Jackson Co., Ala., ca. 22.0 mm. long and 



4.8 mm. wide, the next largest female is 21.4 by 4.9 mm. The 

 smallest measureable female (Blacksburg, Va.) is 16.8 mm. long and 



3.9 mm. wide. The largest male (Morgan Co., Ala.) measures 17.5 

 by 3.9 mm., the smallest (Giles Co., Va.) is 14.0 by 3.1 mm. A badly 

 fragmented male from Newport, Tenn., appears to be even smaller 

 but cannot be measured precisely. I believe that these figures give 

 Q. monticolens the distinction of being the smallest known species of 

 the family Xystodesmidae. 



Female specimens are not only larger in size, but also are distinctly 

 broader in proportion to width. The following chart shows values for 

 length, width, and ratio of width divided by length (averages in 

 parentheses) : 



Synonymy. — The original description of this species (Chamberlin, 

 1951) is extremely brief and consists of a color description and com- 

 parison of the gonopods with those of B. brunnior and B. geniculata. 

 The right gonopod is illustrated in situ, with a fairly adequate draw- 

 ing, although the characteristic appearance of the apex does not show 

 up with the magnification used. 



The legend for figure 16 contains the spelling '^Borarja monticolene," 

 presumably an uncorrected typographical error. 



It is indeed curious that an eastern milliped with so extensive a 

 geographic range should not have been described until 1951. I had 

 received two specimens from eastern Tennessee as early as 1948 but 

 until recently lacked the opportunity to study them closely. 



Biological notes. — There seems to be no definite limitation 

 regarding preferred habitat. I have found the species at 5 localities, 

 3 of them in fairly dry limestone areas, one in shale terrain, the other 

 in moist mesic woods underlain by metamorphics although no bedrock 



