. The American entomologist and botanist. son is simple. Their ancestors inhabitedsome kind or other of Oak in some old Palasozoicepoch millions of years ago, and by the Lawsof Inheritance transmitted the same habit tomost of their descendants. Upon the sameprinciple the progeny of the ancient black raceof men that inhabited Etliiopia in the days ofthe Pharaohs, is found in that very same regionup to the present day. Which of the above two explanations of amost curious and intci-esting phenomenon bethe more rational or intelligible, our readersmust judge for themselves. /, The Wool-sower (Jail
. The American entomologist and botanist. son is simple. Their ancestors inhabitedsome kind or other of Oak in some old Palasozoicepoch millions of years ago, and by the Lawsof Inheritance transmitted the same habit tomost of their descendants. Upon the sameprinciple the progeny of the ancient black raceof men that inhabited Etliiopia in the days ofthe Pharaohs, is found in that very same regionup to the present day. Which of the above two explanations of amost curious and intci-esting phenomenon bethe more rational or intelligible, our readersmust judge for themselves. /, The Wool-sower (Jail.{Qiiercus scminafor, Harris.) The three Willow galls produced by Saw-flies, that we have already treated of in thisArticle, are all monothalamous. The twoOak-galls that we are now about to describe areboth of them polytbalamous or many-celled;that is, each gall contains an indefinite numberof distinct cells, each of which is inhabited bya single gall-making larva. In the Wool-sowergall (Fig. 45 a, sectional view), these cells [Fig. 45.]. Color—Liglit buff, may be seen in the middle of the gall, andare little pip-like bodies having much the ap-pearance of a canary-seed, one of which werepresent enlarged at b, so as to show the holethrough which the perfect fly has made its reader can form a tolerably good idea ofthe shape and make of this fly, by refeiring tothe drawing given in our first Volume (page104, fig. 81) of au allied gall-fly, which howeveris thrice as large and which difters further fromthe S\^ool-sower Gall-fly by the wings beingmuch marked with Wool-sower gall is met with exclusively on the White Oak, and like the Oak-fig Gall towhich we formerly referred (Vol. I. p. 101) is,not a bud-gall, but a true twig-gal!, growingearly in the spring out of the bark of the twigitself. Mr. Bassett (Proc. Ent. Soc. Phil., 11,p. 331) broaches the theory that the Wool-sowergall and Osten Sackcns Q. operator gall arenot twig-galls, but true bud-galls, and
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