MOUTH-PAKTS <>F INSECTS 



991 



' v l\// : /<?7" 



FKI. 7SO. A, tongue of common Hy: a, lolics nf ligula; ?>, portion inclosing 

 the lancets, formed by the metamorphosis of the maxillaa ; r, maxillary 

 palpi. B, a portion of some of the pseudo-tracheae more highly magnified. 



