. Elementary entomology. Insects. THE BEETLES 161 bimacnlatd] is a black beetle half an inch long, with yellow pro- thorax bearing two black spots. Its larva mines raspberry and blackberry canes. The red milkweed-beetles (Tetraopes tetra- ophthalmns) are always common on the flowers of the milkweed, and the larva bore in the roots and stems. III. BEETLES WITH THREE-JOINTED TARSI (TRLMERA) The ladybird-beetles (Coccinellidae) form the only family of the section Trimera, in which the tarsi have but three segments, and. FlG. 235. The convergent ladybird-beetle (Ifippcdamia convergent) a, adult; /
. Elementary entomology. Insects. THE BEETLES 161 bimacnlatd] is a black beetle half an inch long, with yellow pro- thorax bearing two black spots. Its larva mines raspberry and blackberry canes. The red milkweed-beetles (Tetraopes tetra- ophthalmns) are always common on the flowers of the milkweed, and the larva bore in the roots and stems. III. BEETLES WITH THREE-JOINTED TARSI (TRLMERA) The ladybird-beetles (Coccinellidae) form the only family of the section Trimera, in which the tarsi have but three segments, and. FlG. 235. The convergent ladybird-beetle (Ifippcdamia convergent) a, adult; /', pupa ; r, larva. (After Chittenden) the head is usually concealed beneath the prothorax. Their small size (few being over one fourth of an inch long), their broad, oval, or hemispherical shape, and their characteris- tic markings, consist- ing of 'polka-dot' black spots on a yellow or red background, or red or yellow- spots on black, make them readily recognizable, though now and then certain of the leaf- beetles, which have a FIG. 236. The spotted ladybird-beetle (Megilla general resemblance, macula**) are mistaken for them. ^ larva. ^ pupa. ^ adult (After chittenden; United states Nearly all Of this Department of Agriculture). 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 Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882. Boston, New York [etc. ] Ginn and Company
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