Insects at home; being a popular account of insects, their structure, habits and transformations . y are dividedinto two large groups, called Libellulides and Agrionides. Theinsects of these groups may easily be distinguished by theshape of the head, which in the Libellulides is rounded, and inthe AgTionides is more cylindrical and set cross-wise to thebody, something like that of the hammer-headed shark. Sostrongly is this mode of structure defined in some of thespecies, that without their wings they bear no little resem-blance to croquet-mallets. We will take two examples of eachgroup. On Wo
Insects at home; being a popular account of insects, their structure, habits and transformations . y are dividedinto two large groups, called Libellulides and Agrionides. Theinsects of these groups may easily be distinguished by theshape of the head, which in the Libellulides is rounded, and inthe AgTionides is more cylindrical and set cross-wise to thebody, something like that of the hammer-headed shark. Sostrongly is this mode of structure defined in some of thespecies, that without their wings they bear no little resem-blance to croquet-mallets. We will take two examples of eachgroup. On Woodcut XXVII. Fig. 2 is represented one of our finest T 2 276 INSECTS AT HOME. Dragon-flies, known to entomologists as Cordulegaster annu-latus. In tliis genus the ocelli are set in a row, the eyestoward each other above; the lower or anal angles of the leverwings are boldly angulated, and the abdomen is is made to this peculiarity in the generic nameCordulegaster, which is composed of two Greek words, theformer signifying a club, and the other the belly. The insect 1. PhlKothrips coriacea. 2. Cordulegaster anniilatus. 3. Eaphidia ophiopsis. i. ChrysopaTulgaris. 5. Osmylus chrysops. a. Eggs of Chrysopa. attains a very great size, being sometimes even larger thanthe illustration, and is veiy handsome in point of colour, thewhole body and thorax being marked with bold bands andstripes of rich golden-yellow. A specimen in my collectionhas retained the yellow marks of the thorax in a wondeTfullyperfect manner, but those of the abdomen have almost whollyperished. DEMOISELLE DRAGON-FLY. 277 Our next species is that which is represented on Plate 3. Its name is Libellula depressa, and it is generallyaccepted as the typical species of the family. In the insects ofthis genus the ocelli are set in a triangle, the body is mostlybroad and flattened, and the anal angle of the lower wings isrounded. The present species is not so handsome in point ofcolou
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectentomology, bookyear1
