. The American entomologist. Entomology. * Fig. 138, the electrotype of which has been accidentally mislaid, will be given in the ne.'it number. sents that of L. robiniella of the cylindrical group, and Fig. 140 that of Leucanthiza amphicarpexfoliella. In Lithocolletis and Leucanthiza the labium consists of an upper [Fig. ] Labrum of first form in [Fig. r?A^,. and lower lobe; m Phyl- locnistis it consists of a single lobe. Fig. 143 is the labium of Ornix prunivorella Cham. That of inusitatumella L,eucanthiza amplticar- peoefohella (after Cham- is similar to it, but has ''^'?^^• the latera
. The American entomologist. Entomology. * Fig. 138, the electrotype of which has been accidentally mislaid, will be given in the ne.'it number. sents that of L. robiniella of the cylindrical group, and Fig. 140 that of Leucanthiza amphicarpexfoliella. In Lithocolletis and Leucanthiza the labium consists of an upper [Fig. ] Labrum of first form in [Fig. r?A^,. and lower lobe; m Phyl- locnistis it consists of a single lobe. Fig. 143 is the labium of Ornix prunivorella Cham. That of inusitatumella L,eucanthiza amplticar- peoefohella (after Cham- is similar to it, but has ''^'?^^• the lateral tines shorter. There appears to be considerable variation within the limits of each genus in the form of the labrum, but little in that of the labium, and still less in the mandibles. But the labrum and labium in each genus differ somewhat from those of the other genera, though the labrum of . , r <? , <• ° Labrum of first form in Phyllocnistis is not very Lithocolletis guttifinitel- '' ?'la (after Chambers). different from that of Lithocolletis and Leucanthiza. The trophi of Leiicanthiza do not differ essentially from those of Lithocolletis. The labium in Graci- laria (Fig. 144) and in Orfiix is very similar to that of Phyllocnis- tis, whilst the labrum differs decidedly from that of all the other genera; whilst Corisci- um, closely related to Gracilaria and Ornix, has all of its trophi of the first form scarcely distinguishable from those of Phyllocnistis. Lithocolletis, Leucanthiza, Gracilaria and Ortiix have mandibles alike (Fig. 138), and very differ- ent from those of Co- riscium and Phyllocnis- tis (Fig. 137). On the theory of evolution, Phyllocnistis would ap- pear to be the earliest or most elementary form from which the Labrum of Lithocolletis , , , or«rt/^//a (after Chambers). others may have been derived. But, as presently shown, it is at least as probable that all are degraded from a higher form or forms, and not evolved [Fig. 135.;. Please note that
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectentomology, bookyear1
