118 



FIB8T LE880NB IN ZOOLOGY. 



are usually absent. Moreover, the butterfly needs little food; 

 it only lives long enough to lay its eggs,, when it dies. 



How the tongue is formed and how it works is well worth 

 knowing. It should be borne in mind that it is formed by 



Fig. 128 —Front view of head of butterfly, oc, compourd eyes; a, antennae; cl, 

 clypeus; Z&, labium; ffc, maxillae or ''tongue.'* (Magnified 10 times.) 



the two accessory jaws (maxillae), which unite to form a 

 tube. By looking at our specimen after the scales have 

 been rubbed ofE the head, which may be done by a stumpy 

 hair-pencil, it will appear somewhat as in Pig. 128 of the 



ang. 



Fig. 129.— Sectinii of butterfly's " tongue," the two maxiitse uniting to form the 

 food-passage c; <r, trachea; n, nerves; m, muscles of one side. (Magnified 

 125 times.) 



Archippus butterfly. This represents a front view of the 

 head: cl is the front or visor, and Ih indicates the upper 

 lip; tk is the tongue, cut off to show the tube in the mid- 

 dle. An idea how it works can be seen by looking at 



