DOLICHOPID-E. 



149 



PH 



outle-t (vi pi. xi. fig. 14-16). The first week in June they 

 changed into pupa;, casting their skin. The head of the pupa 

 was armed with several points; the ends of the legs, in their 

 sheaths, somewhat detached from the body; the thorax bearing 

 on each side, near the head, an S-shaped process, probably serving 

 for respiration in this stage (fig. 17, 18). Out of these pupae 

 Dolichopus (Eiiens proceeded in a little more than three weeks' 

 time. From this account, the transformations appear to be most 

 like those of the Bmpitfa, among the families of Brackycera 

 which have the pupa stripped of the old skin ; the head of the 

 larva being variable in form, and destitute of jointed appendages : 

 see the transformations of Rhamphomyia spinipes, figured by 

 Bouche ('Naturgeschichtc/ pi. 4. fig. 26-30). 



SYNOPTIC TABLE OF THE GENERA, 

 incurved, unguiculated 15. APHROSYLUS. 



