66 SMITHSONIAN INSTITUTION 



the first day we found that most of them agreed with the western 

 race, rosa, instead of with the typical eastern race we had expected 

 to find, and which we had taken earlier in spring in the same region. 



On examining the matter we found that early in spring when it 

 is still cold the typical form, olympia, is on the wing. After it be- 

 comes hot the butterfly changes over to the western type of colora- 

 tion. So in northwestern Virginia and in adjacent West Virginia you 

 find first the usual eastern form and toward the end of the season 

 the form characteristic of the region from Nebraska southward to 

 Texas and Xew Mexico. 



In June we visited the Dismal Swamp region in company with 

 Mr. and Mrs. Jackson H. Boyd and John and Alexander Boyd of 

 Southern Pines, X. C. On the return trip we found Argynnis diana 

 in James City and Charles City Counties, from which it has not pre- 

 viously been reported. Early in July we revisited this region with 

 Mr. and Mrs. Bell and obtained our first July record for the Virginia 

 metalmark (Xymphidia pumila). 



Toward the end of July we spent 10 days in Highland County, 

 where we found the northern coral hairstreak (Strymoii titus til us) ; 

 elsewbere in Virginia we have found only the southern form ( S. t. 

 mopsus). We also found the diana fritillary (Argynnis diana) gen- 

 erally distributed throughout the county, though nowhere common. 



In the middle of September we spent 2 days on Tangier Island in 

 Chesapeake Bay. Here butterflies were not common. The little salt- 

 marsh skipper ( Panoquina panoquin), however, more than made up 

 for the scarcity of other species, for it was abundant everywhere on 

 the marshes. 



Although we ourselves succeeded in capturing only a single but- 

 terfly new to the Virginia fauna, the northern coral hairstreak (Stry- 

 mon titns titus), three others were added to the Virginia list by our 

 friends. Prof. Lorus J. Milne and Mrs. Milne, of Randolph-Macon 

 Woman's College, Lynchburg, gave us for the National Museum a 

 fine specimen of Erora laeta which they obtained at Mountain Lake, 

 Giles County. Carroll E. Wood. Jr.. of Salem, presented the Museum 

 with an excellent specimen of Incisalia polios from near Salem. 

 Otto Buchholz, of Westfield, X. J., has been so kind as to inform us 

 of his capture of the Palatka skipper (Atrytone pilatka) near Munden 

 in Princess Anne County. 



