. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. lOO ECONOMIC ENTOMOLOGY Lace-wings are delicate pale-green insects with finely veined wings. The larvae have large jaws, and owing to their habit of feeding upon aphids are called aphis-lions. The pupae are enclosed in a white cocoon of silk (Fig. 57). Ant-lions are predaceous larvae, which lie in wait for their prey at the bottom of funnel- shaped pits. The adults have narrow delicate wings. (Chrysopa). siightirr'2 Scorpion-flies (Mecoptera.).—Scorpion-flies duced. {After Foisom.) hav
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. lOO ECONOMIC ENTOMOLOGY Lace-wings are delicate pale-green insects with finely veined wings. The larvae have large jaws, and owing to their habit of feeding upon aphids are called aphis-lions. The pupae are enclosed in a white cocoon of silk (Fig. 57). Ant-lions are predaceous larvae, which lie in wait for their prey at the bottom of funnel- shaped pits. The adults have narrow delicate wings. (Chrysopa). siightirr'2 Scorpion-flies (Mecoptera.).—Scorpion-flies duced. {After Foisom.) have their head prolonged into a beak. The larvae live in the ground and are caterpillar- like. Both larva and adult are carnivorous. ORDER MALLOPHAGA (BITING LICE) * Chief Families and Genera: A. Antennae filamentous, exposed, 3-or 5-jointed; maxillary palpi absent; mandibles vertical; middle and hind segments of thorax fused. B. Antennae 3-jointed; tarsi with a single claw; infesting mammals. —TrichodectidcB. Genus: Trichodectes. BE. Antennae 5-jointed; tarsi with two claws; infesting birds.—PhilopteridcE. Genera: Docophorus, Lipeurus, Nirmus, Goniodes, Goniocotes. A A. Antennae clavate or capitate, concealed, 4-jointed; maxillary palpi 4- jointed; mandibles horizontal; middle and hind segments of thorax sepa- rated by a suture. J B. Tarsi with a single claw; infesting mammals.—Gyropidce. Genus: Gyro pus. BB. Tarsi with two claws; infesting birds.—Liotheidce. Genera: Menopon, Trinoton. (Consult Bull. 5i Divison of Etomology, U. S. Dept. of Agriculture, by Osborn) Although most commonly found on poultry, Biting Lice some- times infest the larger domestic animals. They do not suck blood but feed on the rough parts of the skin and at the base of hairs and feathers, causing considerable irritation. Young chicks frequently suffer severely from their attacks. The most abundant species found on fowls is the common hen louse {Menopon pallidum) y a pale yellow active insec
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
