English: Title: Elementary lessons on insects
Identifier: elementarylesson00need (find matches)
Year: 1928 (1920s)
Authors: Needham, James G. (James George), 1868-1956
Subjects: Insects
Publisher: Springfield, Ill. , Baltimore, Maryland, C. C. Thomas
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library
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:
WHAT AN INSECT IS LIKE: OUTSIDE HEAD THORAX The head bears the eyes, the antennae and the mouth- parts. The eyes are of two sorts: Compound eyes: a single large pair at the sides of the head. If the surface of one of these be examined with a lens it will be seen to be com- posed of a multitude of shining, transparent hex- agonal facets. Each facet bears a little lens through which the light enters, to reach the sensitive nervous apparatus in- side. Each unit of the compound eye contri- butes its own spot light, giving inside what is called a mosaic pattern. This type of eye, so dif- ferent from our own, is believed to be especially good for detecting mov- ing objects. Simple eyes, or ocelli: there are three of these on the top of the head between the compound eyes, minute shining con- vex spots, each with a single lenticular cornea; one ocellus ABDOMEN
Text Appearing After Image:
Fig. 2. -A diagram of the structure of an insect.
Note About Images
Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.