New York Natural Heritage Program
Northern Metalmark
Calephelis borealis (Grote and Robinson, 1866)

New York State Distribution [-]
This species was recently discovered in Dutchess County. The only other known location in New York is from a collection(s) in the 1860s from which the species was first described near Upper Coldenham in Orange County. There is also a record that the species was first discovered along the Delaware River on calcareous ledges (Forbes 1960), however, this may refer to the Upper Coldenham site or possibly south of New York. There appear to have been no other records (Shapiro 1974). This species is not likely to occur much more widely, but more colonies might turn up in the limestone areas of southeastern New York, espcially near the New Jersey border. New York and two adjacent Connecticut counties are the northeastern end of the range.

Global Distribution [-]
There are three major population clusters: northwest Connecticut to northwestern New Jersey (extant in Sussex and Warren Counties in New York); Appalachia from central Pennsylvania through West Virginia then northwest into Ohio-Indiana; Ozark region mainly in Missouri, but Opler (1992) shows range extending into Arkansas and Oklahoma. Published information suggests Ohio may be a stronghold. Records in Shapiro (1966; repeated in most subsequent literature) for southeastern Pennsylvania serpentine barrens are mostly dubious, although a voucher does exist to support the Lima record. Several significant efforts have been made to relocate this species in these barrens with no success.