3 88 
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 
female and larva of Stylops aterrimus. 
female insect very much magnified, with ovo- viviparous larvae 
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 expelled from the mother before they are hatched. 
Packard describes the curious history of the female Stylops 
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 Stylops. The creature is included in the 
