OF DIPTEROUS LARVA. 



3 



In the above description I have purposely refrained from enter- 

 ing into very minute particulars, owing to the imperfection 

 observable in my preserved specimens. I have ventured, however, 

 to relate these few particulars, hoping at some future time to 

 analyse more accurately fresh and living examples, should I have 

 the good fortune to meet with them. 



I cannot conclude these remarks without expressing my thanks 

 to my friend Dr. T. Spencer Cobbold for his excellent drawings, 

 from which the accompanying figures have been copied. 



DESCRIPTION OF CUT AS REDUCED. 



Fig. 1. Three larvae (a, b, c), of the natural size. 

 Fig. 2. The specimen marked c, X 8 diameters. 



Fig. 3. Cephalic segment of the specimen (marked a) : a, buccal cavity ; 

 b, oesophagus ; c, pharyngeal teeth ; d, eyes ; e, muscles of the mouth and 

 pharynx ; /, muscles to the eyes ; g, integument showing a double con- 

 tour, X about 70 diameters. 



Feb. 21st, 1861. 



1* 



