338 TRANSFORMATIONS OF INSECTS. 
On the right-hand, in the accompanying engraving, there is a 
larva much magnified, lately born, and climbing upon the hair of 
one of the Hymenoptera, and on the left hand there is a perfect 
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FEMALE AND LARVA OF Stylops aterrimus. 
female insect very much magnified, with ovo-viviparous larve 
within its abdomen, and between the two figures there is a repre- 
sentation of a larva of the natural size. It is evident, however, 
that ova may be expelléd from the mother before they are hatched. 
Packard describes the curious history of the female Szy/ops 
which he found parasitic on one of the bees. He caught the 
bee, and on examining it he noticed a pale reddish brown tri- 
angular mark on the abdomen, and this was the flattened head 
and thorax of a female S7zy/ops. The creature is included in the 
