CH. XV.] SPECIES OF DIPTEROUS INSECTS. 225 



rous ; but the larvae, instead of being coiled up in a 

 spiral direction, were found to be arranged longi- 

 tudinally, without much order, being merely laid 

 parallel to each other. 



There are, however, some species of fleshflies, 

 such as Musca vomitoria, or the great blue-bottlefly, 

 in which this mode of production does not take 



4. 3. 5. 



2. 



1, 2, 3. The Abdomen of the Blue Fleshfly opened,- and seen 

 in different positions, to show the arrangement of the en 

 closed Eggs, 



4. Portion of the Membrane in which the Eggs are enclosed. 



5. The same extended. 



