52 
Psyche 
[March 
tures contained two eggs although many contained but a 
single egg. These egg punctures are frequently so closely 
crowded that it is impossible to determine to which punc- 
ture an egg belongs. The anterior end of the egg usually 
lies near the surface of the twig with the ventral side of 
the developing embryo toward the outside of the twig. 
The eggs (Fig. 4) are elongate, sharply pointed at the 
anterior end, bluntly pointed at the posterior end and greatly 
flattened. The egg is embedded in a whitish substance which 
usually adheres to the egg at the anterior end and to the 
wood at the posterior end. The color is pearly white when 
first laid with the anterior ventral border brown. As the 
embryo develops the egg turns darker and the anterior ven- 
tral border becomes dark brown, with the pinkish eye spots 
showing distinctly. The surface is smooth. The length varies 
from 1.6 — 1.9 mm., greatest width 0.35 — 0.40 mm., greatest 
depth from 0.60 — 0.65 mm. 
The nymphs apparently hatch early in May. By early 
June they are all in the third instar and by mid June in the 
fourth instar. 
The nymphs of the third instar (Fig. 5) measure about 
6 — 6.5 mm. in length. The head, thorax, legs, wing pads and 
anal segments are brown; the rest of the abdomen creamy 
white; eyes reddish brown; head large; frons inflated; an- 
tennae with nine segments. 
Nymphs of the fourth instar (Fig. 6) measure from 7.5 — 
8 mm. in length. Nearly uniform pale yellow in color. Eyes 
reddish brown ; wing pads well developed. 
The nymphs have the habit of clustering together and 
forming large masses of spittle. (Figs. 2 and 3). These 
masses are more abundant on the terminal twigs and the 
water sprouts at the base of the tree than anywhere else. 
The spittle is secreted in large quantities and frequently 
runs down the branches to the trunk and then to the ground. 
Where the nymphs become abundant the liquid frequently 
drops from the trees in large drops, causing inconvenience 
to the people sitting under the infested trees. When the 
nymphs are full grown and ready to moult to adults they 
have the habit of crawling out on the under surfaces of 
the leaves where they form smaller spherical masses of 
