528 



Lieut. F. Tulloch. 



[Feb. 2, 



encircle the rectum as in Glossina. The hypopygium and penis are of the 

 same type as in Glossina. 



x24. 



Fig. 2. — Male Generative Organs of Stomoxys. Alimentary canal dissected out to show 



Malpighian tubes. Dorsal view. S.G., salivary gland ; O., origin of Mal- 

 pighian tubes ; M.T., Malpighian tubules ; T.T., thickened terminations of 

 the tubules of one side ; E., rectum ; E.P., rectal papillaj, three of the four 

 are seen through the transparent rectal wall ; T., testis ; D., duct of testis ; 

 CD., common duct ; V.S., vesicula seminalis. 



Female Generative Organs. 



The sex of a Stomoxys can be easily ascertained by inspection of the 

 hind end of the abdomen ; but, unlike Glossina, the scutellar bristles are of 

 the same length in both sexes. The female generative organs are of the 

 house-fly type. There are two ovaries (fig. 3, 0., and fig. 4), each consisting 



