OIL BEETLE. 353 
337, Meloé angusticollis Say), the first larva being minute 
and parasitic on bees, sucking their blood, while in the 
Fig. 337.—Oil Beetle, a, firstlarva; b,second larvas e, third larva; d, pupa. 
second and third stages it feeds on the pollen mass designed 
for the young bees. 
Fig. 338.—Stylops childreni, male, dorsal and side view. Much enlarged. 
The blister beetles (ZLytia marginata) undergo a similar 
series of transformations called a hypermetamorphosis, 
