. The American entomologist. Entomology. where a bud would normally be, ami is evi- dently a mere deformution of a bud. Occasion- ally an uudeformed leaf witli its peduncle still entire puts forth from the common centre, some- times bearing a couple of galls at the junction of the peduncle with the loaf. Each gall is one- celled, the cell being about a quarter of an inch long and one-fourth as wide as long, and con- taining a single larva. (Sec Fig. 86,6). Tlic larva closely resembles that of the (Trapc-viiie Apple-gall, and is tiierefore no doubt tliat of some Gall-gnat. Large sized specimens
. The American entomologist. Entomology. where a bud would normally be, ami is evi- dently a mere deformution of a bud. Occasion- ally an uudeformed leaf witli its peduncle still entire puts forth from the common centre, some- times bearing a couple of galls at the junction of the peduncle with the loaf. Each gall is one- celled, the cell being about a quarter of an inch long and one-fourth as wide as long, and con- taining a single larva. (Sec Fig. 86,6). Tlic larva closely resembles that of the (Trapc-viiie Apple-gall, and is tiierefore no doubt tliat of some Gall-gnat. Large sized specimens of this gall bear a general resemblance to a bunch of lilbert or hazel nuts, as they grow on the bush: hence the name that we have given it. Vnller details will be found in the foot-note.* of from 10 to .50 opaque, woolv-pubescent. fusifonn, or sometimes nattish-oval, Ki-een Rail*, lach from 0 30 to 'i inch long, the whole springinu- the | n here normal- ly a bull wouhl he IJriiiriilh il i-onlv the terniiual Jof each sail that i- imlieseeni. i;e- lia-al ', iicin;.'smooth. The interior of each Rail Ulle^hi , ; , with a Erie longituilinally eentral eell ;. iie-li l"n':; and ; inch (Jails made by Plant-lice (Aphid(c]. The galls hitherto referred to have been those whicli arc formed by the mother insect depositing one or more eggs in or on the tissues of the plant which she infests. Those to be now treated of belong to the second or exceptional group, which are formed by a young larva stationing itself externally upon some particular part of the infested plant, usually the leaf, and causing that part to bulge out into a sack, which finally closes at its mouth and shuts up the larva in a kind of prison of its own making. "We see the abortive beginnings of this process in the case of many species of Plant-lice and of Mites; for example the common Currant Plant-louse {Aphis ribis), and sundry Mites that attack t
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectentomology, bookyear1
