THE ER1STALIS TEX AX. 
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creeps out of the door, and transforms in the earth. Twelve 
days after the fly appears.” 
The habits and metamorphoses of the insects included in the 
THE METAMORPHOSES OF THE RAT-TAILED FLY. (EristCllis tenax. ) 
genus Eristalis resemble those of Stratiomys. The larvae have the 
same kind of tail-like appendage, which can be elongated when 
required ; they live in shallow water, and move slowly on the 
bottom by means of very small legs, which are attached to the 
A A 
