102 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iio 



Description: As for the species. In adults, hairs of upper parts 

 blackish basally; tips between Sayal Brown and Snuff Brown. Hairs 

 of underparts blackish basally, with a slight reddish tinge; tips 

 whitish with a yellowish buff cast. 



Measurements: See tables 9, 15. 



Comparisons: Compared with P. r. rofinesquii, P. r. macrotis has 

 coloration darker, more brownish dorsally; mass effect of the under 

 parts less clear white, more yellowish; and mesopterygoid fossa and 

 postdentary part of palate averaging narrower. 



Remarks: Body size averages small in populations in southern 

 Alabama, Mississippi, and Louisiana (tables 9, 15). Specimens from 

 other parts of the range of P. r. macrotis (Atlantic coast and Arkansas, 

 Oklahoma, and northern Louisiana average larger in body size, and 

 resemble P. r. rofinesquii in this respect. There is no corresponding 

 variation in coloration. Morphologically large and morphologically 

 small populations of P. r. maGrotis are similarly colored and are equally 

 distinct from P. r. rafiriesquii. 



Intergradation between P. r. macrotis and P. r. rofinesquii is shown 

 in numerous specimens. Some from Sevier County, N.C., dorsally 

 are like typical P. r. rofinesquii, but some show traces of the yellowish 

 ventral coloration characteristic of P. r. macrotis. Individuals from 

 Marshall and Weaverville, N.C., and HuntsviUe, Ala., are more per- 

 fectly intermediate in aU details of coloration, but are nearer P. r. 

 rofinesquii. A specimen from Leigh ton, Ala., approaches Gulf Coast 

 populations of P. r. macrotis in size, but is like P. r. rofinesquii in colora- 

 tion. Specimens from central and northern Louisiana are unac- 

 countably variable in coloration but average nearer P. r. macrotis. 

 Characters of P. r. macrotis apparently are most accentuated in coastal 

 plain populations. Those of P. r. rofinesquii are found west of the ! 

 Appalachians, from Tennessee northward. 



Although there is no assurance that the specimens upon which | 

 LeConte based his description of Plecotus macrotis came from his 

 plantation near Riceboro, it is reasonably certain that they came from 

 Georgia. The original description stated the range simply as the 

 "United States," but in a later note on macrotis, LeConte (1855, p. 

 437) specified that it "inhabits Georgia." There are two LeConte 

 specimens of Plecotus in the U.S. National Museum, perhaps the very 

 specimens upon which the description of macrotis was based. Both 

 are skulls only, labeled simply "United States." Both could very 

 well have come from the same coastal locality, possibly from the Le- 

 Conte Plantation. Since coastal Georgia is an area probably typical 

 of the coastal race of P. rofinesquii, and lacking evidence that Le- 

 Conte's description was based on specimens from elsewhere, I foUow 

 Miller (1897, p. 51) in designatmg the vicinity of the LeConte Planta- 



