E. Hargheaves 



3-23 



Rostrum (Figs. 38 and 47). The rostrum is a prominent structure 

 equivalent to the Labium of other insects, and consists of three segments, 

 with an imperfect joint again dividing the middle one. On its anterior 



Xnvux^v.'iv.a.i vo"r\. 



Fig. 46. Rostrum. 



Fig;. 45. Antenna. 



Fig. 47. Rostrum. 



surface is a deep groove, extending along its whole length, for the 

 reception of the stylets. The tip is sharply serrated, presumably to 

 enable the insect to get a grip on the leaf surface during insertion of 



Ann. Biol. T ^^ 



