296 



tup: butterflies of new England. 



brown, tinted sometimes witli cinnamoneoiis ; fringe as above but a little less wliite. 

 Hind ivings with a mesial belt exactly similar to that of the upper surface except in 

 being slightly bi'oader ; Avithin this belt, the wing is dark, rich, olivaceous brown, 

 more or less enlivened with reddish orange or cinnamoneous scales ; in the cell two 

 spots situated and colored as those of the fore wings, but very narrowly margined 

 with black, that at the extremity of the cell crossing also the lowest subcostal inter- 

 space; a similar oblique, oval, slightly smaller spot, barely bordered with black in the 

 costo-subcostal interspace, directly above or a little outside of that in the middle of 

 the cell; a few bluish scales, occasionally clustered in spots, are usually scattered 

 about the cell and near the base of the costal nervure ; sometimes they are of a metallic 

 purplish blue, and sometimes they becloud nearly the whole l)ase of the wing ; costal 

 margin at base broadly margined with dark orange red ; beyond the belt the wing is 

 pui'plish black, with a double submarginal row of curved streaks, like those of the 

 upper surface but slightly larger ; in each interspace between these and the mesial 

 belt there is a large, roundish, dark orange red spot, occupying nearly all the inter- 

 mediate space, sometimes only two-thirds as broad as the interspaces but usually 

 nearly touching the nervules, and occasionally uniting to form a continuous band; 

 fringe as above, excepting that the black occupies about the same amount of space as 

 the white does, and in the suljmedio-internal interspace is white. 



Abdomen purplish black, below with broad medio-ventral and narrow latero-ven- 

 tral stripes of white, the former broader at the apices than at the bases of the seg- 

 ments. Appendages of male (33 : 9) : hook of upper organ scarcely curved and equal on 

 the basal three-fourths, beyond gently arcuate, tapering at first gently, afterwards more 

 rapidly to a flue point. Clasps three times as long as broad, beyond the prominence 

 of the lower edge tapering regularly but not greatly to a broad, rounded apex, but 

 with a considerable rounded prominence of the upper edge in the middle of the basal 

 two-thirds of the free portion, similar to that of astyanax; apex of clasp very nearlj' 

 one-half as broad as the base, and armed with a few, small, pointed spines more distant 

 than on astyanax, and extending also, much smaller, upon the apical portion of the 

 lower edge; interior finger broad at base, tapering at first a little, afterwards scarcely 

 at all, so as to be nearly twice as broad as in the other species, straight, directed up- 

 ward and scarcely backward, scarcely free, excepting in the slight portion which ex- 

 tends above the prominence of the upper edge as in astyanax, covered with fine 

 prickles, the tip very ])luntly pointed. 



*One specimen taken near Boston by Mr. Thaxter had a fore wing 47.5 mm. in length! 



Hybrids. B. Proserpina (astyanax-artiiemis). For the form proserpina, see 

 the preceding section, where it is discussed as a hybrid between this species and 

 B. astyanax. 



B. aktiieoiiippus (artuemis-archippus) {Limenitis artheiiiis, al)err. C. Edw. , Pap., ii : 

 47). Another case, more confidently to be referred to hybridism, is a male specimen 

 in the Museum of Comparative Zoology at Cambridge, obtained at Chateauguay 

 Basin in September, 1879, by Mr. J. G. Jack, and which is certainly to be looked upon 

 as a hybrid between arthemis and archippus. 



The upper surface presents a curious commingling of the characters of the two 

 species. The ground and the markings of the fore wings are mainly those of archip- 

 pus, but the black has suffused itself so thoroughly as to melanize the entire wing, 

 which only shows the proper orange ground in a somewhat obscured fashion in the 

 cell, particularly at the base, in the lower median and medio-submedian interspaces, 



