. The Cambridge natural history. Zoology. ^oo STREPSIPTERA CHAP. male emerging very soon after the host has become an active winged Insect, while the female undergoes no further change of position, but becomes a sac, in the interior of which young develop in enormous numbers, finally emerging from the mother- sac in the form of the little triungulins we have already mentioned. This is all that can be given at present as a general account; many points of the natural history are still obscure, others have been merely guessed; while some appear to differ greatly in the different forms. A few brie
. The Cambridge natural history. Zoology. ^oo STREPSIPTERA CHAP. male emerging very soon after the host has become an active winged Insect, while the female undergoes no further change of position, but becomes a sac, in the interior of which young develop in enormous numbers, finally emerging from the mother- sac in the form of the little triungulins we have already mentioned. This is all that can be given at present as a general account; many points of the natural history are still obscure, others have been merely guessed; while some appear to differ greatly in the different forms. A few brief remarks as to these points must suffice. Bees carrying, or that have carried, Strep- siptera, are said to be stylopised (it being a species of the genus Styloj^s that chiefly infests bees); the term is also used with a wider application, all Insects that carry a Strepsip- terous parasite being termed stylopised, though it may be a Strepsipteron of a genus very different from Stylops that attacks them. The development of one or more Strepsiptera in an Insect usually causes some deformity in the abdomen of its host, and effects consider- able changes in the condition of its internal organs, and also in some of the external char- acters. Great difference of opinion prevails as to what these changes are; it is clear, how- FiG. 154.—Young larva ever, that they vary much according to the of Styloris on a bee'.s- . ji hair. raacni- species, and also accordmg to the extent ot fled. (After Xewport.) the stylopisation. Usually only one Stylo'jjs is developed in a bee; but two, three, and even four have been oljserved: ^ and in the case of the wasp, Polistes, Hubbard has observed that a single individual may liear eight or ten individuals of its Strepsipteron {Xenos, n. sp. ?). There is no exact information as to how the young triungulins find their way to the bee-larvae they live in. Here again the discrepancy of opinion that prevails is probably due to great.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
