234 



\V. WESCHE ON THE GENITALIA OF 



as, although the hooks are very palpable, yet the last segment is 

 turned in under the abdomen. 



Before describing the genitalia of Glossina palpalis I propose 

 to formulate what I consider to be the typical armature. 



On the ultimate segment of the abdomen, whether it be turned 

 in or not, are paired hooks, the forcipes superiores, and between 

 these hooks are paired hairy plates, the forcipes inferiores. 



Diagram of the genitalia as usually found in Diptera. 



"., force i>s superior ; 



b, ,, inferior; 



c, ,, interior ; 



d, genital palpus ; 



e, adnriniculuin ; 

 /, tittilator ; 



k, laminae superiores ; 

 i, theaca, or sheath of penis. 



On the edge of the abdomen, opposite to the forcipes superiores 

 und bordering on the cavity containing the genitalia, are paired 

 processes, often setose ; these are the laminae superiores. 



In the sub-hamate division, where the hypopygium is hinged 

 on the penultimate segment of the abdomen, there is a chitinous 

 arch or ring, which extends from the point where the laminae 

 superiores are found, round the cavity of the genitalia, forming 



