. A manual for the study of insects. Insects. HYMEN OP TERA. 6iS. typical species is The Pigeon Horn-tail, Tremex cobtniba (Tre'mex co-Ium'ba). The body of this insect is cylindri- cal, as large around as a me- dium-sized lead-pencil, and at least an inch and a half long (Fig. 744). The thorax and head are rust-red and black. The abdomen is black, with ochre-yellow bands and spots along the sides; the horn at tlie hind end of the body is yellow; the antennae are rust-red, with broad black ^^^- u\^-Tremex coUimba. rings at the middle. The wings are smoky color and trans- parent ; the legs are d
. A manual for the study of insects. Insects. HYMEN OP TERA. 6iS. typical species is The Pigeon Horn-tail, Tremex cobtniba (Tre'mex co-Ium'ba). The body of this insect is cylindri- cal, as large around as a me- dium-sized lead-pencil, and at least an inch and a half long (Fig. 744). The thorax and head are rust-red and black. The abdomen is black, with ochre-yellow bands and spots along the sides; the horn at tlie hind end of the body is yellow; the antennae are rust-red, with broad black ^^^- u\^-Tremex coUimba. rings at the middle. The wings are smoky color and trans- parent ; the legs are dull yellow. The female pierces the wood of a tree to the depth of half an inch, where she de- posits her eggs; sometimes her ovipositor gets wedged in the wood and holds her there a prisoner until she dies. The grub is cylindrical and whitish, and attains the length of an inch and a half ; it does great injury by perforating trees, especially elms. It transforms within a cocoon made of silk and fine chips. When the fly emerges it breaks through the cocoon, creeps to the mouth of the burrow, gnaws through the bark, and flies off. The preceding is the only species of Tremex that occurs in our fauna. In this genus there is a single closed marginal and two closed submarginal cells. The Horn-tails of the genus 5/r^;r (Si'rex), of which we have many species, closely resemble Tremex in form, but differ in having two marginal and three submarginal cells. Family Cynipid^e (Cy-nip'i-dae). The Gall-flies, These insects are termed gall-flies because the majority of the species live within galls; but it should be remembered. 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 Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. joint author. Ithaca, N. Y. , Comstock Pub. Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
