378 PROCEEDINGS OF NATIONAL MUSEUM vol.99 



Type locality. — Mountain Lake, Giles County, Va. Most specimens 

 collected near the University of Virginia Biological Station, with pre- 

 dominating forest cover of deciduous trees such as oak, maple, and 

 yellow pojjlar. The undergrowth is largely of ericaceous shrubs. 

 Mountain Lake is located on the top of Salt Pond Mountain, in central 

 Giles County, at an elevation of about 3,800 feet. 



Remarks. — This species has its closest affinities with Apheloria 

 antrostomicola, from which it may be only subspecifically distinct. 

 The similarities in pattern, gonopods, preanal scale, and coxal lobes 

 all suggest such an association. The type localities for the two species 

 are less than 40 miles apart and are in the same moiuitain range. 

 Collecting in the intervening region will prove interesting, as it is not 

 yet known whether antrostomicola occurs in humus away from lime- 

 stone regions. 



APHELORIA TRIMACULATA (Wood) 



Polydesmus (Fontaria) trimaeulata Wood, Proc. Acad. Nat. Sci. Philadelphia, 

 vol. 6, p. 6, 1S64 (Susquehanna County, Pa.). 



Virginia: Alleghany County: McGraws Gap, 3 miles northwest of 

 Clifton Forge, EHL Nos. 3-3047-3b, 5-1847-lb, 6-147-lb, 6-1447-lb, 

 and 6-2147-1; Augusta County: Sherando Lake, near Lyndhurst, 

 EHL No. 8-1547-lc (male and 2 females collected by Carr) ; Elliotts 

 Knob, 10 miles west of Staunton (1 dead female seen in August 1947) ; 

 Bath County : Douthat State Park, female seen June 15, 1947. 



A. trimaeulata has also been reported from Mountain Lake, Va., by 

 Loomis (Psyche, vol. 51, p. 175, 1944). The accuracy of the locality 

 data, however, is not beyond suspicion, inasmuch as a summer of very 

 thorough collecting at Mountain Lake has not revealed any xystodes- 

 mids that might be considered tr'nnaculata. 



The specimens listed above are all rather large, exceeding previ- 

 ously published measurements. Since Wood's figure of the gonopod of 

 trimaeulata is not very useful for comparison with specimens, it seems 

 advisable to relegate this large southern form tentatively to trima- 

 eulata until topotypic material can be examined. 



A. trimnculata is a very common form near Clifton Forge, and on 

 damp or rainy da3''s one can observe many specimens out wandering 

 around. At other times no special effort is needed to dig specimens 

 out of the leaf mold. They are often seen on hemlock logs, but I have 

 yet to find one inside a log. Large numbers of unpigmented young 

 of this species are found during the spring months, becoming scarce 

 later in the year, and specimens almost mature are very rarely seen. 

 The change from seventh instar larvae to adults takes place during 

 August. Mating occurs throughout the summer, from early in June 

 through August. 



