34 



FIELD ZOOLOGY. 



called hypermetamorphosis. All insects may be divided 

 along the line of complete or incomplete metamorphosis ; 

 those with the additional larval stages being placed with 

 the complete and those without change of body form 

 during immaturity being placed with the incomplete. 



F 



FIG. 16. Stages in the hypermetamorphosis of Epicauta. A, triungulin; 

 B, carabidoid stage of second larva; C, ultimate stage of second larva; D, coarctate 

 larva; E, pupa; F, imago. E is species cinerea; the others are vittata. All 

 enlarged except F. (Folsom, after Riley, from Trans. St. Louis Acad. Science.} 



The insects with complete metamorphosis are, per- 

 haps, the most familiar insects. Take, for example, the 

 tomato worm '. (Fig. 17.) The eggs are at first green like 

 the tomato leaf upon which they were laid; in the course 

 of three or four days they turn yellow, and in about six 

 days they begin hatching. The eggs are laid singly and 

 are to be looked for on the under side of tomato leaves. 

 The larvae also feed on other plants, as the Texas thistle, 

 but the author has never found eggs on the thistle. From 



