PLATE XLIII. 

 Fig. 1. 

 Lateral view of female fly. 

 Pn — Pronotuni. 

 n — Notum of mesothorax. 

 ms — mesothoracic spiracle, 

 m's — metathoracic spiracle. 

 m"s — mesosternum. 

 as — abdominal spiracles. 

 tr — tarsi, 

 c — ^costa. 

 sc — subcosta. 



e — emargination marking junction of r with costa. 

 r — radius. 



v-\ radius 2 + 3 + 4 + 5. 



m+m' — media 1 and 2. 

 en — cupitus. 

 a — anal veins. 



Fig. 2. 



Dissection study of fly from left side. 



In the thorax the oblique muscles have been removed to show the left 

 longitudinal thoracic muscle in place but shrunken — the trachea, t, is 

 shown also in figure 5 as dotted. A portion of the metathoracic integu- 

 ment (in) is left intact to show metathoracic spiracle. 



s — stomach. 



mp — Malpighian tubules of left side shown. 



h — dorsal vessel. 



rp — rectal pouch also shown in fig. .3. 



i — chitinized invagination. 



th — muscle of thorax. 



Fig. 3. 

 Rectal pouch showing striations and three of the papillas — rp. These 

 show the nuclei, having been stained with borax carmine. 



Fig. 4. 

 Salivary glands. 



d — common duct leading to salivary receptacle, 

 r — reservoir, 

 g — gland showing nuclei — from a stained specimen. 



