372 PROCEEDINGS OF NATIONAL MUSEUlvI vol.99 



the figures were made with some deference to uniformity of position. 

 The drawings that accompany the following descriptions were made 

 to show the configuration of the left gonopocl and were made from 

 direct cephalic and lateral or mesial aspects after the appendage had 

 been removed and oriented properly. 



I take pleasure in acknowledging my indebtedness to H. F. Loomis 

 for examining specimens and supplying information, to Lawrence M. 

 Carter for assistance with the drawings, and to Dr. Hobbs for many 

 courtesies attendant upon the work as well as for many collections. 



Family XYSTODESMIDAE Cook 



Xystodesiuidae Cook, Ann. New York Acad. Sci., vol. 11, p. 5, 1895. (Type genus : 

 Xystodesmus Cook.) 



Genus APHELORIA Chamberlin 



Apheloria Chambebun, Can. Ent., vol. 53, p. 232, 1921. (Genotype: Fontaria 

 montana Bollman.) 



Telopodite of male gonopod a simple coiled blade, with a small 

 curved basal spine. 



APHELORIA ADELA Chamberlin 



Apheloria adela Chamberun, Bull. Univ. Utah, vol. 30, No. 2, p. 10, fig. 34, 1939 

 (Ithaca, N. Y.). 



Virginia: Grayson County: Mount Rogers, east side near top, 1 

 male, ELH No. 7-147-2b; Tazewell County: Burkes Garden, 1 male, 

 RLH No. 6-3047-lb. 



These records constitute a very considerable extension in the known 

 range of adela, which heretofore has been reported only from Ithaca, 

 N. Y,. Doubtless it ranges southward in the Appalachians and will 

 be found in West Virginia, Maryland, and Pennsylvania. 



It is not impossible that future studies may show adela to be a syn- 

 onym of A. coriacea, but for the time being it seems possible to dis- 

 tinguish the former on minor differences in the gonopods and pattern. 



APHELORIA ANTROSTOMICOLA, new species 



Plate 26, Figures 1, 2 



Diagnosis. — Telopodite of male gonopod strongly recurved, form- 

 ing slightly more than a complete circle, bent mesiad with distal end 

 directed cephalically ; color black, with yellow keels and large crescent- 

 shaped orange spots on the posterior margins of the tergites. 



Description. — A medium-sized species. Length of holotype, 38, 

 width, 8.8 mm.; length of allotype, 40, width, 8.5 mm. Width of 

 body averages 22 percent of length. Segments between fourth and 



