REVISION OF BORARIA AND GYALOSTETKUS — HOFFMAN 337 



two localities. Three males from Highlands average 5.6 mm. wide, 

 whereas 3 from the Smokies average only 4.6 mm. in width, a difference 

 of a full millimeter. Of com^se, the series examined are far too small 

 to show the full range of variation in the two regions, yet they un- 

 questionably indicate that a size differential does exist. It is the 

 more remarkable that only the male sex seems to be involved. 



In all other respects (structural details, color pattern, gonopods), 

 aU of the specimens appear to be quite uniform and invariable. 



Figure 19. — Distribution records for Boraria deUirkiana (Causey). Each dot is a separate 



locality. 



Biological notes. — ^Virtually nothing is known of the biology of 

 this species. The available material was aU collected dming June and 

 July, but the period of activity is undoubtedly much longer. All of 

 the specimens from Highlands, N.C., were found in the rhododendron 

 thicket surrounding Lake Raven el at the Biological Station; those 

 from Heintooga Ridge were also from rhododendron litter. The 

 specimen from Chimneys Camp Ground in the Smokies came from 

 mixed hardwood and hemlock cove forest; those from Clingman's 

 Dome presumably are from the evergreen forest which covers the 

 upper thousand feet of that mountain. 



Boraria deturkiana seems clearly to be a high-altitude species; the 

 known localities range between about 3000 and 6600 feet. 



T63-237--60 3 



