192 PROC. ENT. SOC. WASH., VOL. 23, NO. 8, NOVEMBER, 1921 



fig. 17 Same prepupa same day (as figure 16) but with skin entirely removed 

 showing formation of pupa; head, prothorax, mesothorax, meta- 

 thorax and first abdominal segment. (Dorsal view). 



fig. 18 Same as figure 17; lateral view. 



fig. 19 Pupa which had shed its prepupal skin naturally, prothorax, meso- 

 thorax, metathorax and first abdominal segment. 



fig. 20 Adult; thorax and first abdominal segment. 



fig. 21 Adult; longitudinal section through mesothorax including post- 

 scutellum and the anterior and posterior phragmae, showing large 

 dorsal longitudinal muscle and connecting ligament. 



fig. 22 Adult; posttergite, connecting ligament, postscutellum and phragma 

 and longitudinal section of postscutellum and phragma. 



fig. 23 Adult; metathorax including metapostscutellum. 



fig. 24 Adult; longitudinal- section from tergum of abdomen, showing 

 divisions of segment and large longitudinal muscles. 



Actual date of publication, November 29, 1921 . 



