I'lKUlNAK: ELUi'MUS I'lIlI.OUUE. 1115 



E. r. Misi'iouK. Mr. K. (1. Siuil)oni lias shown iiie a very interesting sutVnsed 

 feniiile of tliis species talvcnl)y Mr. John Os'jooil in Lynn, Mass., in Augnst, 18i;:J. Fore 

 winjis <j')i<re wholly and uniformly blackish griseons, excepting a clear yellow si)ace 

 on the miiUlIe half of the iinicr border, reaching as far as to the middle of the medio- 

 snbniedian interspace, and excepting also that the base of the median and medio-sub- 

 nicdian interspaces as far as half way from the base of the lower median nervule to 

 the outer border is heavily, and the base of the wing within this lightly, flecked with 

 yellow : there are also faint indication of the yellow spots of the marginal border, but 

 excepting next the inner margin the border as well as the spot at the apex of the cell 

 is wholly merged in the general lint. On the hind wings the outer border is very 

 faintly indicated, the whole wing but especially the lower half considerably begrimed 

 with griseous flecking and the central spot of the under surface but faintly indicated 

 by any distinct spot above, while the whole centre of the wing has a slight orange tint. 

 Beneath the fore wings have the usual spot at the tip of the cell, but from t)ie points 

 where the position of the transverse series of spots belong commence broad, blurred, 

 longitudinal streaks of blackish fuscous, following all the interspaces in the direction 

 of the base of the wings, excepting the base of the lower median, nearly Ailing also 

 not only the subcosto-median interspace, but also most of the cell ; all the other parts 

 of the wing are also lightly flecked witli dusky scales. On the hind wings the changes 

 are somewhat similar; the central and basal spots are normal and there is a faint in- 

 dication of the costal bar; the outer flfth of the wing is also as usual, while the 

 whole wing within that, at least below the middle subcostal nervule, is suffused with a 

 mingled griseous and pinkish flecking, the latter most prominent along the middle of 

 the interspaces. Expanse 55 ram. 



A first approach toward this suffusion is showu iu a specimen bred by Mr. Edwards 

 in West Virginia and figured iu the Butterflies of North America, ii, pi. CoUas 3, fig. 7. 



Dimorphic forms. The description of the species given above is drawn up from 

 the noimal (ovm, E. p. philodice. The pallid form of the female is well known, has 

 been excellently rtgured by Edwards (Butt. X. Amer, ii, pi. Colias 2, fig. 6; pi. Colias 

 3, rtgs. 5, »>) and by Glover (111. N. Amer. Lep.. pi. G, fig. 11, ined.) and may be de- 

 scribed under the name 



E. r. r.vi.i.iDiCK. On the upper surface the yellow is wholly replaced by a sordid 

 white scarcely tinged with green and upon which the dusky fleckiugs are more con- 

 spicuous and the central spot of hind wings is of a very pale orange. Beneath they 

 are also pallid, especially on the fore wings, but not to so great an extent as above and 

 on the apex of the fore wings and to a less extent on the costal margin of the hind 

 wings they are considerably suftused with pale sulphur j'ellow ; excepting the costal 

 bar, all the markings of the outer half of the wings are obliterated iu all but one of 

 the specimens before me. but iu that they are more than usually distinct. I believe 

 this was first noted by Gosse in his Canadian naturalist (p. 184) and uext by D'Urbau 

 in his unsigned articles in tlie Canadian naturalist (ii : 318). In the north this rarely, 

 almost never, occurs in the first brood of the seasou, and is found much more abun- 

 dantly in the latest than in the middle brood, the numbers increasing as -the seasou 

 advances. In the south, however, if we may follow Edwards, it occurs not infre- 

 quently in the spring brood, but the only actual record he gives is of one taken May 

 8tli. and as he reckons specimens taken by Lintner in N. Y. on June 20 as belonging 

 to the first l)roo(l, when they unquestionably belong to the second, it is not impossible 

 that the >:uui' rule liolds iu the soutli as in north (Can. ent., xiv:50-51). 



Secondary sexual distinctions. Besides the ditt'erences already detailed in the 

 markings of the wings, there occur androconia (46 : 37) collected in a patch at the 

 upper base of the hind wings above, but not forming a visible "glandular" spot. They 

 are colorless or nearly so, very finely striate, more than half as long again as broad, 

 with broadly convex sides, strongly rounded angles, truncate apex and well marked 

 basal lobes. Tliey vary, however, considerably in form and are sometimes asym- 

 metrical, but are in general stouter and more quadrangular than in E. interior. 



Egg (65: 25). About eighteen longitudinal ribs, slightly raised but very distinct, 



