302 The University Science Bulletin. 



The nymphs liked to stay hidden most of the time, but would 

 come out and feed quite readily. It was interesting to see one of 

 the little fellows prodding around an insect for a soft spot in which 

 to insert its needlelike beak. Nor does it disturb one of them in the 

 least to remove the insect and place same under the binocular to 

 watch the process of feeding. 



The newly emerged nymphs, either from the egg or molt, are very 

 bright red in color, with eyes, antennae, beak and legs very dark. 

 They become dark, however, in a very short time, except the nymphs 

 which emerge from the eggs; these are red for more than a day. 

 The adults are very pale pink or yellowish when they first emerge, 

 with eyes, antennae, beak and legs very dark. They become dull 

 black in a short time, with rather pale, obscure markings on the 

 wing covers. 



DESCRIPTION OF STAGES. 



See plate XXXIV. 

 THE EGG. 



Size. Length about 1.2 mm.; width across mdest part, .3 mm. 



Color. Pearly white and transparent when first laid, becoming yellow in 

 color three days later. The fourth-day egg shows red eyelike spot, and two 

 days later the entire egg becomes red in color; another day later, making seven 

 daj's from time egg was laid, it is blood red with verj' dark, eyelike spots. 

 When nine days old the egg is orange red, and on the twelfth day the nymph 

 emerges. A few hours before hatching the egg becomes pale or whitish in 

 color. 



Shape. General shape shown by drawing. It is elongate, larger and more 

 broadly rounded at one end, tapering and much smaller at the other end, with 

 dorsal part arched. 



FIRST INSTAR. 



Size. Total length of one day-old nymph, about 1.1 mm.; width across 

 abdomen, .6 mm. 



Color. Red to light reddish brown, with dark spot on fifth abdominal seg- 

 ment, on the median line of the dorsal part. Eyes, legs, beak and antennae 

 black. 



Structural peculiarities. Rostrum reaching to the apex of the posterior coxae. 

 Antennae four-segmented, last joint darker in color and larger than the others. 

 Tai-si one-jointed. Length of first stage, four days. 



SECOND INSTAR. 



Size. Length about 1.8 mm.; width across abdomen about 1 mm. 



Color. Dark reddish brown on dorsal part,^with ventral part red. Venter 

 very dark brown, nearly black. 



Structural peculiarities. Antennae four-segmented, with last segment larger 

 than the other segments. Rostrum reaching to the base of the posterior 

 coxae. Antennae and legs covered with very fine black hairs, some longer and 

 more sparsely placed than the others. 



Shape. A trifle stouter than first-instar nymph. 



