THE MOUTH-PARTS OF THE THYSANOPTERA. 



BY H. G ARM AN. 



EXPLANATION OP FIGURE. 



Front (ventral) view of the head of Limothrips cerealium Haliday 

 (to some extent diagrammatic). 1, compound eyes; 2, radiating part 

 of endocraniam at base of right eye; 3, bar which connects the same 

 of left side with edge of epicranium; 4, mandible of left side, repre- 

 sented more enlarged at right of figure; 5, rudimentary mandible? of 

 right side; 6, clypeus; 7, labrum; 8, galea? of maxilla; 9, lacinia? of 

 maxilla; 10, maxillary palpus. 



FOR some time the writer has been familiar with a pecu- 

 liarity in the mouth-parts of members of this group of in- 

 sects which is without a parallel among other insects known 

 to him, and is so extraordinary that some hesitation is 



(24) 



