IN THE ANTENNA AND PALPI OP DIPTERA. 



63 



long channel running down to the base of the pit (cf. M. domes- 

 tica, text-fig. 38). There ai"e a few short sensory processes, with 

 here and there a chitinoiis spine. 



Sarcophagid^. 



PI. IV. fig. 11 is a photomicrograph of a transverse section of the 

 antenna of Sarcophaga carnaria. Each cell may be seen running 

 to its corresponding sensory process. The processes are broad at 

 the base, changing abruptl}^ to a fine point. The nerve (iV), which 

 shows black in the photograph, encircles the whole sense-organ. 



Tachinid^ (Text-figs. 40, 41, and PI. TV. fig. 12). 



Text-fig. 40 shows a transverse section through the antenna of 

 an undetermined species. It illustrates the peculiar shape of the 

 sensory processes and the large nerve running to the sense-pit. 



Transverse section of the antenna of an undetermined Tachinid. X 980. 



PI. IV. fig. 12 is a photomicrograph of a transverse section of the 

 antenna of another undetermined species. In this, the sensory 

 processes are long and thin ; the nerve is seen enclosing the whole 



