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mine of Lithocolletis is very similar to a Phyllocnistis mine ; and 

 during the portion of the larval life when this mine is made, 

 and indeed in the flat and ornatella groups throvighout the 

 entire larval life, except in its last stage, the mouth parts (fig. 2) 

 are identical with those of Phyllocnistis. So long as this char- 

 acter of the tropin is present in all these groups the body is 

 depressed or flattened, the sides of the segments are mammil- 

 lated, and the legs are but feebly developed. In all of these 

 respects the larvsB resemble somewhat those of Phyllocnistis. 

 Prof. Zeller, as quoted by Mr. Stainton in Ins. Brit., v. 3, 

 p. 285 (I have not seen Zeller's paper myself), gives as one of 

 the characters of Phyllocnistis "larva apod," and Dr. Clemens, 

 in Tin. N. Amer., p. 83, states that the " larva is without feet 

 or prolegs." As to the earlier stages of its larval life, this is no 

 doubt true, but as to the later stages, its truth depends on what 

 is meant by being " without feet or prolegs." The next three 

 segments after the head, the last and the penultimate segments 

 are certainly without appendages of any kind ; but on each side 

 of each of the other segments, not, it is true, at the point usually 

 occupied by the legs, but pi'ojecting obliquely from the edge of 

 each segment, I find, in P. ampelopsiella Cham., a very distinct 

 two-jointed appendage, without either claw or circlet of tentacles, 

 which certainly aids the larva in its slow progress through its 

 long and narrow mine. It is not pretended that these append- 

 ages are homologous with even the feebly developed legs and 

 prolegs of the young Lithocolletis larvge, yet I do not see why 

 they are not as properly called legs as those of a Nepticula. 

 The resemblances of the larvae of Lithocolletis to those of Phyl- 

 locnistis lie in the thin and flattened body, the mammillated 

 sides of the segments, the character of the trophi (fig. 2), and 

 the linear character of the mines. The next three segments 

 after the head are somewhat enlarged in the first stage of Litho- 

 colletis, as in many other genera Qe.g., Gracilaria), but this is 

 not like the great lateral enlargement of the same segments in 

 Phyllocnistis. The legs (fourteen in number) are present in 

 all the three groups of Lithocolletis, though they are feebly 

 developed in all stages of the flat group, in the first five stages 

 of the cylhidrical group, and in all except the last stage of L. 



