90 Cincinnati Society of Natural History. 



It is unnecessary to give in detail all the particulars of the life history 

 of i. ornateUa Cham. In most respects its development does not differ 

 from that of L. giittifinitella, Clem., as above given; and it will suffice 

 to point out the particulars in which it does so differ. The larva is 

 not so much flattened, a transverse section of it being more ellipsoid. 

 The maculae make their appearance on the second to the twelfth seg- 

 ments inclusive, and are solid spots, not mere rings, and are found only 

 on the ventral surface. In the fourth stage they are less distinct, and 

 in the fifth ai'c scarcely discernible. In the fourth stage the larva is 

 tinged with a peculiar greenish hue, and in the remaining stages it is 

 of a bright green color. At the end of the first stage, thelarva is .584 

 mm., at the end of the second 1.168, of the third 1.752, and at the end of 

 the fourth 2.336; that is, in each of these stages, the larva, like L. gutti- 

 finitella, adds the length of the larva at the the end of the first stage. 

 But at the end of the fifth stage, unlike giittijinitella, it adds twice that 

 length, and is 4.10 mm. long. 



The same ratio as to the amount of food consumed in the several 

 stages, as in guttijinitella, also prevails, so long as it can be ascer- 

 tained by the size of the mine ; that is, in each stage the larva con- 

 sumes three times the amount of food that it did in all of the previous 

 stages combined. In the first stage, there is a single ocellus placed as 

 it is in guttijinitella, and a second one is added at the second stage, 

 and these continue to grow through the next four stages, but each 

 ocellus is more distinctly composed of separate minute pigment spots. 

 The transformations take place just as in guttiflnitella. Thus far 

 there is no sufficient reason for separating L. ornatella from the flat 

 larvae, as a group by itself. But at the fifth moult it departs widely 

 from guttlfinitella\ and although it eats nothing after the fifth stage, 

 yet the mandibles instead of being aborted, are larger than they were 

 in the fifth stage, though otherwise the same change in the form of the 

 trophi occurs as we have seen occur in gxMifinitella ; that is, in the 

 sixth and seventh stages they are of the form shown at figure 3, instead 

 of that shown at figures 1 and 2. A still greater change in the feet 

 takes place at the fifth moult, for in the sixth and seventh stages both 

 the thoracic and ventral feet are as well developed as in any ordinary 

 caterpillar, the ventral feet having the circle of booklets, and the tho- 

 racic ones being each armed with a well developed claw. The form of 

 the larvae also undergoes a great change; it is no longer flat, and the 

 dorsal surface is convex in the sixth stage, and b}' the end of tlie 

 seventh the larva has become c>'lindrieal. There may be a reason in 

 the habits of the larva (or vice versa) for tliis difterent development. 



