An Introduction to Entomology, Part 1 |
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abdomen abdominal segment adult insects agamic alimentary canal anal antennæ base belong beneath body body-wall bugs caudal end characters claws color common species compound eyes costal coxæ crickets developed distal dorsal Dragon-flies eggs entomologists excretion extend female four-jointed front wings furnished genera genus Grasshoppers greatly head Hemiptera Heteroptera HEXAPODA Hind wings inch infested insects jointed labium larva larvæ lateral legs length less Locust longitudinal male mandibles margin maxillæ membrane mesothorax metamorphosis moult Mouth-parts formed nearly Neuroptera nymph occur ocelli organs Orthoptera ovipositor pair of wings palpi pests plant-lice plants Plate posterior pronotum prothorax Pseudoneuroptera pupa represented resemble rostrum rudimentary scale sclerites scutellum second pair side skin slender spines structure sub-family sub-order sucking surface tarsi tegmina termed thorax three-jointed Thysanura tibiæ trachea tracheal gills transverse trees usually veins ventral vertex wing-covers wingless
Popular passages
Page 132 - Not only do the members of this family appear very different from other insects, but there is a wonderful variety of forms within the family; and even the two sexes of the same species in the adult state differ as much in appearance as insects belonging to different orders. The most obvious characters...
Page 201 - The immature insect is of the same dirty brown color as the substance covering the egg, and but little darker than the withering leaf. It is of a broad, flat, oval shape, and spines seem to project from almost every portion of its body. It looks under the microscope more like a lobe of prickly cactus than anything else I can think of.
Page 96 - In the male the ventral surface of the abdomen consists of nine segments^ in the female there are but eight. The caudal end of the body in the female has four horny appendages, the ovipositor; in the male the ventral pair of appendages is represented by a single plate. As mentioned before...
Page 189 - Their manner strongly recalls that of the tiger-beetles that inhabit the same places. When approached, or in any way disturbed, they leap from the ground, arise a few feet into the air, by means of their wings, and alight a short distance away, taking care to slip quickly into the shade of some protecting tuft of grass or clod, where the soil agrees with the color of their bodies.
Page 208 - In early spring they emerge from their winter quarters and pair; soon after the females begin to lay their eggs; this they do leisurely, the process being carried on for two or three weeks. The eggs are yellowish ; about 500 are laid by a single insect; they are deposited in fields of grain, beneath the ground upon the roots, or on the stem near the surface. The eggs hatch in about two weeks after being laid. The newly-hatched bugs are red ; they feed at first on the roots of the plants which they...
Page 145 - The young scale insect thus becomes a degraded grub-like creature with no organs of locomotion. The mouth parts remain, however, in a highly developed state and are well fitted to perform their functions. This apparatus is not the least remarkable thing in the structure of these insects. It is terminated by a thread-like organ, which is frequently much longer than the body of the insect, and is composed of four delicate hair-like bristles. By means of this organ the insect is firmly attached to the...
Page 118 - When the cricket wishes to make his call, he elevates his tegmina at an angle of about forty-five degrees with the body; then holding them in such a position that the scraper of one rests upon the file of the other, he moves the tegmina back and forth laterally, so that the file and scraper rasp upon each other. This throws the tegmina into vibration, and produces the call.
Page 96 - Stenobothri, when about to stridulate, place themselves in a nearly horizontal position, with the head a little elevated; they then raise both hind legs at once, and grating the thighs against the outer surface of the elytra, produce notes which, in the different species, vary in rapidity, number and duration.
Page 149 - This species infests a great variety of plants, and is to be found throughout our country from the Great Lakes to the Gulf of Mexico and from the Atlantic to the Pacific.
Page 196 - They kill their prey by inserting into it the proboscis, which injects a most powerful poisonous liquid into the wound. The victim thus pierced dies in a very short time. They then leisurely suck the juice out and drop the empty skin.