2 74 Annals Entomological Society of America [Vol.11, 



soon becomes distended and is henceforth quite the most promi- 

 nent part of the insect. They remain during the whole of this 

 instar hidden among the blossoms. Their small size permits 

 them to do this with ease. Their color during this stage is decid- 

 edly protective, as indeed it is during all stages. The color of the 

 petals is pink and red while the stem and lower parts of the blos- 

 soms are a pale green. The black of the head and thorax blends 

 perfectly with the shadows while the paler color of the abdomen 

 harmonizes with that of the stems. 



This instar lasts from two to three days when the insect anchors' 

 itself by extending its fore legs as far forward as possible and its 

 hind ones far back. The skin splits open longitudinally on the 

 thorax and the insect slowly pulls itself out. At first it is a pale 

 red, but this deepens and in some cases passes to a decided brown. 

 The color of the entire insect is now c{uite uniform except on very 

 close inspection. The head and thorax though slightly darker 

 than the abdomen have permanently lost their black color. 

 This is in keeping with their new surroundings for their increased 

 size no longer permits them to remain below in the shadows but 

 they must now remain outside where the prevailing colors are 

 red and pink. Toward the latter part of this stage the wing-pads 

 may be faintly distinguished beneath the skin, and two black spots 

 appear on the abdomen, one on either side of the dorsal glands. 

 This instar lasts from two to four da^^s. 



The most notable change in the third instar is the appearance 

 of the wing-pads clearly outlined, with their veins showing as 

 black stripes. The thorax is also more clearly defined and the 

 eyes have become more prominent. This instar is of from three 

 to five days duration. 



In the fourth stage, which lasts from five to seven days, the 

 head is clearly defined by the constriction between it and the 

 thorax. It now has more nearly the form of the head of the adult 

 insect. The prothorax has also become more prominent, and the 

 scutellum becomes faintly visible. The wing-pads have become 

 quite prominent with their outer margins and three veins black. 



The fifth and last instar lasts from three to nine days. The 

 scutellum, in this stage, is clearly defined and the wing-pads 

 have become very prominent, reaching almost to the fourth abdo- 

 minal segment. The antennae have apparently reached their 

 full development though the tarsi are, as in all the nymphal 

 stages, but two jointed. The eyes are very well developed but 



