. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. 52 ZOOLOGY. Fig. 55.— Polistes. Sli^itly reduced. Photo. Ijy W. H. C. P. nearly spherical gray paper envelope (Fig. 56). These are found attached to or parts of buildings. The paper is made of finely masticated wood-fibre cemented l.)y a secretion. Certain yellow-jackets form nests in the ground. The hornets are well known as among the most vindictive of our northern insects, and their sting is capable of producing considerable pain. In all Hymenop- tera the pain of the sting is due to the introduc-
. Elements of zoology, to accompany the field and laboratory study of animals. Zoology. 52 ZOOLOGY. Fig. 55.— Polistes. Sli^itly reduced. Photo. Ijy W. H. C. P. nearly spherical gray paper envelope (Fig. 56). These are found attached to or parts of buildings. The paper is made of finely masticated wood-fibre cemented l.)y a secretion. Certain yellow-jackets form nests in the ground. The hornets are well known as among the most vindictive of our northern insects, and their sting is capable of producing considerable pain. In all Hymenop- tera the pain of the sting is due to the introduc- tion of a poison into the l)ody of the victim through the stinging organ. This poison is secreted l)y a special gland of the insect. The digger and mud wasps (Fossoria 'j have the most varied habits. One of the most familiar species is Pelopmus,- which somewhat resemljles a true wasp, but may be easily distinguished from it by the long, slender attachment of the abdomen to the thorax and b\' the fact that the TOngs when closed lie fiat and horizontal (Fig. •57), while in the true wasjis they are folded like a fan. Other species bore into the pith of Nat. size. Piioto. plants or make burrows in the ground. INIanv byW. H. f. p. , , ,. ., . , ' are predaceous, leedmg on sjuders, cicadas, etc. The ants (Formiciihe '') constitute a well-known group hav- ing features so marked thatother insects, excepting the termites, will hardly be confused with tliem. From the termites ants 1 From .foM,or, digger. "^ pelos, slime. = From/orm/ca, 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 Davenport, Charles Benedict, 1866-1944; Davenport, Gertrude Anna Crotty, 1866- joint author. New York, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1911
