XXVII. On the Anatomy and Affinities of Pteronarcys regalis, Newm.: with a Postscript, containing Descriptions of some American Perlidæ, together with Notes on their Habits.
XXVII. On the Anatomy and Affinities of Pteronarcys regalis, Newm.: with a Postscript, containing Descriptions of some American Perlidæ, together with Notes on their Habits.
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DOI：
10.1111/j.1096-3642.1846.tb00435.x
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发表时间：
1851-05
期刊：
影响因子：
--
通讯作者：
G. Newport
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文献类型：
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作者：
G. Newport
3 Ii 2 but ilnperfectly preserved in the dried insect, and consequently most easily overlooked, esist in all the speciinens of the different species of Pterouarcys in that collection. Branchiae were thus found to be noririal structures in the imago Pteronays, and even to characterize the genus, a1 though they had hitherto entirely escaped observation. Since the period when I obtained my single specimen, in December 1843, I have anxiously awaited the receipt of other exltniples of the insect preserved for dissection; but as I have not yet been so fortunate as to obtain them, and as I desire to make known some account of the internal structures of this remarkable insect, I have now made an anatomical examination of rny specimen, having taken especial care to preserve it as entire as possible, in illustration of the facts of its anatomy, and in authentication of my account of them.M. Pictet, the most diligent and elaborate of all monographers of the Neu-roptera, has regarded the insects of the genus Pteronarcys, Newm.*, as only large Perlidctlt, which have the body strong and elongated, and the wings large and supported by numerous and solid reticulatiom He has, however, very properly, retained the genus as established by Mr. Newman on the structure of the wings. But the entire organization of Ptei-marcys,-not merely those portions of its external anatomy, the branchiae, which were unknown to that gentleman when he established the genus, but also the whole of its internal conforination,-most fully authorise the separation of Pteronnrcys from Perla. The peculiarities of the structures I am about to describe prove the correctness of view, and the acuteness of zoological perception and tact, which led the naturalist just mentioned, although entirely unacquainted with the anatomy of some of the primary and really important organs of the insect,-the peculiarities of which, doubtless, are of first importance in the life and habits of the species,-to establish his genus on characters which then were the most obvious for zoological description, although of only secondary physiological consequence,-the reticulations of the wings. To understand rightly the nature of the peculiarities of this insect, I must
