Occasional Papers of the Miiscinn of Zoology 7 



expanded at its upper extremity in a flattened triangular 

 area, giving the entire pale area in general the shape of a 

 fish; metastigma covered by a large quadrangular black 

 area which extends upward about half the height of the 

 thorax, joined at its lower anterior corner by a curved 

 stripe with the humeral stripe below, and at its upper pos- 

 terior corner by a dorso-posteriorly directed stripe with a 

 black stripe on the second humeral suture; the pale area 

 on the mesepimeron and the pale area above on the met- 

 episternum are thus joined into one area which is sepa- 

 rated from the pale area below on the metepisternum ; in 

 old males the pale thoracic color becomes dark reddish 

 brown instead of yellow as in females and younger males, 

 but in the oldest specimens seen the thoracic pattern is 

 still discernible; the same is true of the abdomen, and in 

 no case is there the complete blackening of both thorax 

 and abdomen, especially of the thorax, attained by males 

 of martha. Wing markings very similar to viartlia, but in 

 extreme cases the colored areas are more reduced than in 

 martha and, at the other extreme, the areas are never as 

 extensive as in the most highly colored specimens of 

 martha; in the darkest males of the two species the only 

 difference is the more extensive posterior development of 

 spot c and the complete joining of spots b and c by cf in 

 martha, while in oriiata c is more widely separated from 

 the posterior wing margin and d is never represented by 

 more than a spot between h and c, and a and c are never 

 connected along the wing margin, thus leaving the yellow- 

 tinged areas enclosed by these spots much more extensive 

 in ornata than in martha. In male ornata at the minimum 

 the front wing is entirely hyaline; in the hind wing e is 

 wanting, but the first antenodal of the second series is 

 brown-edged; o occupies the cubital space from the base 

 to beyond the cubito-anal crossvein and extends posteriorly 

 along the edge of the wing; c is represented by an area 

 of about the same size as a and is bounded distally by Cu 

 spl ; basally it does not attain the wing border ; b and d 

 are wanting. In the darkest males there is a trace of basal 

 yellow in the front wing in addition to the dark edging of 

 the first antenodal of the second series and a lesser edging 

 of the cubito-anal crossvein ; in the hind wing e is present 

 to slightly beyond the third antenodal ; a and b are present 

 and are joined; c is well developed but separated from the 

 posterior margin by two or three cells, and d is present as 

 a spot midway between the distal extremities of b and c. 



