Vol. XXvi] ENTOMOLOGICAL NEWS 6l 



At this time, the remaining bright orange female was 

 found mating. 



9 a. m.. July 20. The orange of the female which was 

 seen mating on the previous afternoon had dianged to dark 

 brown on the thorax and head, but a little orange was stiU 

 visible on the sides of segmenfl 1 and 2. The remainder of 

 the dorsum was dull grayuh blue and there was a band on the 

 apex of segments i to 7 and the posterior half of 8, while all of 

 segments 9 and 10 were blackish. The face, sides of the thorax 

 and the underparts were greenish yellow. 



The two |>ruinose females were slightly darker in color, 

 the apex of the blackish triangle on 8 having almost reached 

 the basal bonier of the segment. These three mdividuals were 

 placed in a smaller cage of wire gauze. 



Six orange females which had emerged in the laboratory 

 on July 19 and 20 w^r*. now placed in •*»- '•»•■'" '•^?** •»»«•* "•» 

 males included. 



9 a. m.. July 24. No change occ u rred until this date, when 

 one orange female became slightly pmtnote with a tinge of 

 brown on the abdomen. 



July 25. Two other females had liecome pniinose. and in 

 time thr^e and the one olMerved July 24 assumed a colora- 

 tion like the one first described. Ko funlier change was noted 

 in those which had been pbced in the ivnall cage except that 

 they became more pruinosc 



From these data we may canciudc tivit the tcmalc of 

 Jsthnura vertualis Say varies •omewhat in stae and at the 

 time of emergence is marked with bright orange on the post- 

 octilar spots, the thorax and the firM three segments of the 

 abdomen. Four davs or more after emergence, this orange 

 turns to brown and then to a gray blue. At the same time the 

 bronze black becomes bluish or blackish. The face, sides of 

 the thorax and the underparts become yellowish green. This 

 entire color change may take place in less than eighteen hours, 

 and may occur either before or after mating. The rapidity 

 with which the color changes occurred after mating in the 



