HIPPOBOSCA OVINA, 347 
much larger than the body — legs yellow 
and brown, armed with four claws— 
length two lines and a half. 
The second, H, hirundinis*, head yel- 
low — thorax darker — abdomen dusky, 
with a blueish cast, broad and flat — wings 
tapering, narrow, and short — legs long, 
each foot furnislied with six claws. You 
see the differences are well marked, and 
yet each species has some characters 
which are common to all. Now, Lucy, 
our Entomology must be laid aside for 
to-day. 
* Prom Hirundo, a swallow* 
