PLATE I. 
SiPHONOPHORA Ros^. (Page 103.) 
Fig. 1. — Eggs of S. rosce deposited on a leaf bud of 
a briar, December Sth, 1872. 
Fig. 2. — The young Aphis hatched from one of 
these eggs on March 12th5 1873, whilst the snow was 
on the ground and the thermometer marked 25° Fahr. 
In this stage the young Aphis is oblong ; in colour 
ochreous-green, with an olive head, legs, and cornicles. 
Only thirteen segments can be easily counted, all of 
which are traversed by a pale dorsal stripe. The 
body is powdered with white meal. The small figure 
is of the natural size. 
Fig. 3.— A young Aphis, seven hours old, born 
August 1st. Eight individuals were produced, all tail 
foremost, between the hours of ten and four. They 
still show little or no division between the thorax and 
the abdomen. Even at this early stage rudiments of 
embryos may be detected within the bodies. Imme- 
diately after birth the young began to absorb sap, and 
in a few hours afterwards they moulted their skins. 
Fig. 4. — A young Aphis born in October ; c, an- 
tennse of the same. Only five joints can be distinctly 
traced ; d, hind leg of the same. A second tarsal 
joint may be seen in a rudimentary form. The 
rostrum is very short and stout. It is greatly magni- 
fied in Plate III, fig. 7, and there are shown the setse 
with their ramifications into the head. 
Fig. 6. — Young born from a winged viviparous 
female, December 29th, 1873. The temperature of 
the preceding night was 24° Fahr. The antennse 
joints have increased from five to six. The approxi- 
mation of form to the adult larva here is obvious. 
Fig. 6. — The adult apterous viviparous female as 
seen in autumn, when she has almost ceased to produce 
young. 
Fig. 7. — Head, rostrum, frontal tubercles, and seven- 
jointed antennse of the winged female. 
