THE MEDIAN SEGMENT 



91 



.f. 



FIG. 94. T, 8. thorax of Tipula gigantea ; 9, of Lcptis ; 10, thorax of Titbanus bromius after 

 the removal of the abdomen, in order to bring into view the inner mesophragma (/), and to show 

 the extension of the metathorax g and (/' ; tr, trochanter : 1 1, hind end of the mesothorax, the entire 



by him to be the 1st abdominal segment) ; 4, metasternum (hypopleura of Osten Saekt-n K r> ( y i 

 s tern urn of metathorax" (Brauer)=metapleura of Oj-tni Sacken); 6, and also //, halter; xt l , 

 iiH'Snthoracic sti^nui : xt 2 , metathoracic stigma; */ 3 , first abdominal stigma; y, dorsopleural ; 

 5, sternopleural ; e, mesopleural sutures; h, 1st, i, 2d, abdominal segment; <i/, wing; tthil, alula. 

 12, the head and the three thoracic rings, and the 1st abdominal segment of JC/ifn in, ra nilijiilii. 

 the connecting membranes are in white : <i, prothorax ; b, pnescutum ; c, scutum ; d, scutelluin ; 

 e, postscutelluni ; ps, postscutellum of mesothorax. After Brauer. 



