Mouths of Insects. 



117 



65, e) and lower or labium. 

 the second pair of max- 

 illse in the lobster and 

 crayfish, which in most 

 insects are united toge- 

 ther, but sometimes as 

 in cockroaches (fig. 64) 

 and locusts remaining 

 separate. The labium 

 bears a pair of feelers 

 called labial palps (k). 

 Between the labrum and 

 the labium are two pairs 

 of jaws placed vertically, 



The lower (/) represents 



Fig. 64. 



Under side of mouth of Cockroach, a, 

 notch for cervical sclerite ; g, outer 

 edge ofgalea;/^, maxillary palp; t\ 

 ligula ; *, paraglossae ; k, labial palp; /, 

 mentum ; in, submentum ; i, cardo or 

 hinge ; 2, stipes ; 5, lacinia of maxilla ; 

 6, galea, or sensitive process of max-illa. 



FIG. 66. 



1 



Upper side of head of Cockroach. 

 , fenestra or rudimental eye ; ft, antennary 

 fossa ; b, epicranium, or top of the head ; c, 

 compound eyes ; d, clypeus ; e, labrum ; f. 

 mandibles ; g, h, i, k, 5, 6, as in fig. 64 ; 

 A, antennae. 



Mouth of Flea. 

 Showing the slender style- 

 like labrum between the 

 long mandibles medially, 

 pnu th-^ labial and max- 

 illary palps laterally. 



