File:Animal and vegetable physiology, considered with reference to natural theology, by Peter Mark Roget (1834) (14592336519).jpg

Identifier: animalandvegetab01roge (find matches)
Title: Animal and vegetable physiology, considered with reference to natural theology, by Peter Mark Roget ..
Year: 1834 (1830s)
Authors: Roget, Peter Mark, 1779-1869
Subjects: Biology Physiology Plant physiology Natural theology
Publisher: London : W. Pickering
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ufficiently secures them from any danger arisingfrom falls. Some insects are furnished with a still morerefined and effectual apparatus for adhesion, andone which even enables them to suspend them-selves in an inverted position from the undersurfaces of bodies. It consists of suckers, thearrangement and construction of which are ex-ceedingly beautiful; and of which the commonhouse-fly presents us with an example. In thisinsect that part of the last joint of the tarsuswhich is immediately under the root of the claw,has two suckers appended to it by a narrowfunnel-shaped neck, moveable by muscles in alldirections. These suckers are shown in Fig.1 -52, which represents the under side of the footof Miisca vomitoria, or blue-bottle fly, with thesuckers expanded. The sucking part of theapparatus consists of a membrane, capable ofcontraction and extension, and the edges of STRUCTURE OF INSECTS. .3.33 M^hicli are serrated, so as to fit them for theclosest appUcation to any kind of surface. In
Text Appearing After Image:
the Tahanus, or horse-fly, each foot is furnishedwith three suckers. In the Cimhex lutea, oryellow saw-fly, there are four, of which one isplaced upon the under surface of each of thefour first joints of the toes (Fig. 1-53); and allthe six feet are provided with these suckers.In the Dijtiscus maroinalis, suckers are fur-nished to the feet of the male insect only. Thethree first joints of the feet of the fore-legs ofthat insect have the form of a shield, the undersurface of which is covered with suckers havinglong tubular necks ; there is one of these suckersvery large, another of a smaller size, and agreat number of others exceedingly small. Afew of the latter kind are represented highlymagnified in Fig. 154. In the second pair offeet, the corresponding joints are proportionallymuch narrower, and are covered on their undersurface with a multitude of very minute suckers.The Acridium higuttulum, which is a species ofgrasshopper, has one large oval sucker, under 334 THE MECHANICAL FUNCT

Note About Images