NYMPHALINAE: BRENTHIS MYRINA. 



595 



smallest in the centre of the wing and incrcasini;: in size in eitlier direction, sometimes 

 flecked above, especially in the lower half of the wing, with black scales, but having an 

 indefinite outline ; l)etween these and tlie intra-mesial Ijand, the subcostal and median in- 

 terspaces arc lieavily tinged witli ocliraceous ; tiiere is a marginal series of large, round- 

 ish, silvery spots supporting black or dark cinnamoncous, ratlier slender, sagittate 

 spots, which are sometimes edged a1)ove very delicately with ocliraceous ; the subcosto- 

 median and upper median interspaces are almost wholly bathed in ocliraceous from 

 •liere to the extra-mesial row of silvery spots; nearer the marginal than the extra- 

 mesial row is an arcuate scries of small, round, black spots, subparallcl to the outer 

 border, obsolescent above and below; outer margin narrowly edged with blackish 

 brown ; f I'inge as on upper surface. 



Abdomen above blackish fuscous, the sides more or less enlivened, especially at the 

 tips of the segments, with fulvous scales, and at the tip of the abdomen with fulvous 

 hairs; beneath abundantly besprinkled throughout with fulvous scales, becoming 

 thicker toward the extremity of the abdomen. 



Male appendages (33 : o^-:io) : upper organ ; hook much more strongly curved than 

 the centrum, generally as long as it; of equal breadth throughout, it tapers in depth 

 regularly to a point, which, viewed from above, is seen to be bifid, hollowed to the 

 depth of the width of the hook. Clasps less than half as long again as broad, as far 

 as the base of the posterior process, which extends from the upper angle as a very 

 long and slender, strongly curving or angulated lobe lying in a horizontal plane and 

 tapering on the apical third to a point which is directed forward and a little inward. 

 The upper process consists of a long, slender and spatulate lobe, also horizontal, 

 but slightly upturned and bent a little inward, its posterior edge minutely denticulate. 



Described from 28 3 5 ? . 

 Aberrations. B. m. nubes. In the Museum of Comparative Zoology is a male from 

 Sanbornton, N. H., collected by W. Blaney on August 15, 1884, which is a remarkable 

 instance of sufl'usion. The gi'ound color of the upper surface of the wings is normal, 

 but the black markings are greatly changed. On the fore wings there are no markings 

 whatever on the basal half, excepting the transverse bar at the extremity of the cell, 

 and the broader transverse bar in the middle of the same, both of which are normal. 

 All other markings, excepting the longitudinal streak at the base of the medio- 

 submedian interspace, are simply suppressed ; this suppression includes the two nar- 

 rower transverse bars of the cell and the whole of the mesial stripe excepting its 

 outermost member, the bar crossing the subcosto-median interspace, and this is 

 reduced to a minimum. The black markings of the outer quarter of the wing are 

 pretty completely run together, the round spots becoming long ovals and meeting the 

 mai'ginal markings, while the fulvous dots next the margin, though not lost, are sub- 

 dued, and are also elongated into streaks, especially in the upper half of the Aviug. 

 On the hind tcinr/s the cell is completely filled with black, excepting a small, apical, 

 triangular, tawny spot, which does not encroach on the nearly normal black bar clos. 

 ing the cell; the whole of the medio-submedian interspace, as far as the end of the 

 cell, is also, as normally, blackish griseous ; but, as on the fore wing, there is nothing 

 left of the mesial stripe excepting, not its outermost member, but that in the lower 

 median interspace, which has here run baseward to meet the basal spots, filling uearl)' 

 the entire basal half of the interspace. All the other marginal markings have com- 

 pletely overspread the apical quarter of the wing on its upper half, though on the 

 lower half the round spots of the median interspaces have preserved their integrity, 

 while the marginal markings are reduced to a minimum. 



