Occasional Papers of the Museum of Zoology 9 



constricted above; in the male the dorsal area is reduced 

 to a narrow triangle with the lateral sides concave so the 

 dorsum of the thorax is largely yellow in young and red 

 in older males; side of thorax similar in the two sexes and 

 similar to that of ornata except that the dorso-posteriorly 

 directed stripe from the quadrangular black area covering 

 the metastigma is wanting, so that the pale area on the 

 mesepimcron, the pale area above on the metepisternum and 

 the pale area below on the metepisternum are all joined 

 above; color pattern of thorax and abdomen retained in 

 the oldest males as in urjiata, the darkening pale color 

 redder in bertha than in ornata. Jl'ing markings more 

 reduced than in ornata and martha, those most reduced 

 being less colored than in the most reduced specimens of 

 the other two species, and in the most highly colored males 

 of bertha the colored area is less than the most reduced 

 males of martha and but little more extensive, than the 

 most reduced males of ornata. In the most reduced males 

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

 cubital space is yellow as far as the cubito-anal crossvein ; 

 spot a is a small, rounded spot reaching A and the wing 

 margin; c is represented by the merest edging of two or 

 three veins on the posterior margin of the yellow area 

 which surrounds spot a; all other spots wanting. In the 

 darkest males in the front wing the area between Sc and 

 R to the first antenodal and the cubital area halfway to 

 the cubito-anal crossvein are yellow tinged ; in the hind 

 wing the base is yellow tinged between Sc and R and to 

 a lesser extent between C and Sc to the second antenodal ; 

 the median space is largely yellow tinged and the cubital 

 space entirely so except where limited darker color occurs ; 

 spot a is present, slightly larger than in those specimens 

 with reduced coloration; b is present as a small spot or 

 area on the proximal side of the triangle and a and b are 

 narrowly joined; c is about as large as a and b together; 

 it extends distally only as far as the level of the proximal 

 side of the triangle ; there is no trace of d or e. The 

 description of the most reduced male wings will apply to 

 all the females seen, except that the hind wing, in addition 

 to the markings described for the male, is tinged with 

 yellow at the base between C and R as far as the first 

 antenodal. C and R in the male pale and reddish (or yel- 

 lowish in tenerals) to the stigma; in the female the costa 

 at base, some antenodals, and the veins in the colored 

 wing area in ' the hind wing, yellow, other veins in the 



