1923] 
Notes on Sinea Diadema 
75 
masses, the individual eggs upright and arranged in two rows. 
As thus seen under magnification they are very beautiful, the 
structures of the cap and the collar-like extension of the chorion, 
which extends outwards from the new laid egg, appearing like 
delicate lace. 
The first instar nymph is a most grotesque little insect 
with a very large head powerful beak and large, strong front 
femora provided with numerous stout, sharp spines. The arma- 
ture is admirably designed for a predatory habit, the head and 
thorax being covered with plates of very stout, smooth, black 
chitin against which, we are pleased to believe, a much larger 
insect might struggle without effect, once it is in the grasp of 
powerful front femora. Young nymphs that I confined wasted 
no time on covering themselves with litter and soon became all 
but indistinguishable. Here again the insect is found superbly 
fitted for its habit, for on the thorax it bears four sharp, stout 
spines, than which no structure, perhaps, would better serve 
for retaining the litter with which it covers itself. 
The egg of this species has been described by Ashmead 
(1895 — Insect Life VII p. 321) and Heideman (1911 — Proc. 
Ent. Soc. Wash. XIII p. 135) and the young nymph by Ashmead. 
Since I intend to display illustrations, I have enlarged these ex- 
cellent descriptions somewhat. 
Fig. 2. Sinea diadema (Fabr.) _ A — egg, lateral view; B — egg, dorsal view of the cap and the 
extension of the chorion; C — Detail structure of the extension of the chorion; 
D — first instar nymph, lateral view; E — egg mass. 
Egg. Length 1 . 3 mm. ; width .6 mm. ; diameter of extension 
of chorion .8 mm. Color brown, minutely granulated, somewhat 
