PAMrillLini: LKHEMA HIANXA. 



1773 



Described from 4 3,89. 



Accessory sexual peculiarities. The discal stigma of the male has been de- 

 scribed under the wing ; the scales contained in it are very simple in character and of 

 less variety than usual ; next the base there are found some of the two-pronged rods 

 (51 :3 d) of no great length or slenderness, and long and slender subspatulate scales 

 (3 a) ; at the tip are found very slender and elongated jointed scales (3 b) , besides 

 some moderately large, equal and slender boat-shaped androconia (3 c). 



Variations. Mr. F. II. Sprague has in his collection an interesting ? specimen, 

 taken in Wollaston, JIass., in June, in which not only are all the white spots larger 

 than usual, and the uppermost of the three subcostal spots of the fore wing not half 

 the size of the succeeding, but a very difl'erent appearance is given to the under sur- 

 face of the hind wings by the presence of white scales in the interrupted extra-mesial 

 series of dusky spots, forming slender transverse bars in the interspaces, the series 

 forming a right angled band having its angle beyond the cell in the middle of the 

 outer half of the wing, and its first spot the here slightly enlarged spot which some- 

 times occurs in the outer portion of the costo-subcostal interspace. In addition to 

 this outer series there is, subparallel to it, a strongly arcuate, basal series of dark 

 edged white spots, the regular spot of the base of the costo-subcostal interspace 

 forming one end of the series, and an entirely similar and equally large one occupying 

 a corresponding position in the medio-submedian interspace the other end, while be- 

 tween, the spots are very faint and slight. The specimen measures 17.5 mm. in length 

 of fore wing, and on its under surface varies from the normal markings of the 

 species toward those of Lerema loammi Whitn., of the south. 



Distribution (32 : 8) . This interesting and characteristic member of 

 the AUeghanian fauna has been found, so far, only in a narrow^ belt of 

 territory stretching from the Atlantic to the western plains north of Lat. 40°. 

 West of New England it lias been taken in comparatively few places : in 

 New York, near Brooklyn, Long Island (Morrison) and near Albany 

 (Lintner) ; in Michigan, according to Strecker ; in the township of Ohio, 

 111. (Morrison) ; in Wisconsin common (Hoy) ; in Iowa according to 

 Strecker, and in Nebraska according to Edwards. 



In New England it is confined to the southern portions and is known 

 from but few localities ; the northernmost being at Milford, N. H., where 

 it is said to be somewhat common (Whitney) ; besides which it has been 

 found at several places in the vicinity of Boston, — Quincy and Dorchester 

 (Sanborn), Maiden and Wollaston (Sprague), at Springfield, Mass. 

 (Emery) and near New Haven, Conn. (Smith, Mus. Yale Coll.). 



History. According to the observations of Messrs. Lintner and 

 Sprague it appears to be single brooded. The earliest butterflies appear 

 about the 25th of May — perhaps earlier, for females have been taken then — 

 and the last specimens captured were taken just past the middle of June. 

 This covers the whole of our meagre knowledge. 



