CYCLORHAPHA. 

 SYRPHID.^. 



In the Syrphidae the scutellum of the mesothorax is 

 in contact with the upper part of the abdomen as in 

 some of the Tabanidse, so that the metathorax cannot 

 be seen. When, however, the basal part of the abdo- 

 men is gently pressed downward, a portion of the 

 posterior part of the metathorax, marked as the meta- 



b" 



tS-2 



Fig. 215. 



thoracic scutellum in PL XII., Fig. 198, //, is brought 

 into view. It is seen that in Syrphus the abdomen 

 makes a broad junction with the thorax near the mid- 

 dle of this scutellum. If now a portion of the abdo- 

 men is cut away, and all its contents removed, the lower 

 and concealed part of the scutellum is exposed, as 

 seen in Fig. 215, //. In other words, the abdomen is 

 attached near the middle of the scutellum rather than 

 264 



