. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. Fig. 10.—Head and mouth-parts of a horse-fly (Tabanus). The maximum number of parts is retained, but the piercing structures are distinctly blade-Hke. Dipteron type, second subtype. A, Side view of head showing: i, antenna (brachy- cerous); 2, compound eye; 3, labium; 4, labella; 5, maxillary palpus; B, piercing structures exposed, labium removed; 6, mandibles; 7, maxillae; 8, hypopharynx; 9, labrum-epipharynx. (After Herms.) Mouth-parts of the Stable Fly.—The proboscis is awl-shaped a
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. Fig. 10.—Head and mouth-parts of a horse-fly (Tabanus). The maximum number of parts is retained, but the piercing structures are distinctly blade-Hke. Dipteron type, second subtype. A, Side view of head showing: i, antenna (brachy- cerous); 2, compound eye; 3, labium; 4, labella; 5, maxillary palpus; B, piercing structures exposed, labium removed; 6, mandibles; 7, maxillae; 8, hypopharynx; 9, labrum-epipharynx. (After Herms.) Mouth-parts of the Stable Fly.—The proboscis is awl-shaped and is adapted for both piercing and sucking (Fig. 13). It projects forward horizontally and has a prominent elbow. The labella are small and are provided with cutting and adhesive structures. Lying above and within the folds of the proboscis or labium are two unequal, sharp heavy bristles, the larger representing the labrum and the smaller the hypo- pharynx. The maxillary palpi are not so large as those of the house- fly. The palpi of the Horn Fly are longer and more flattened, and the proboscis is plumper and not thrown so far forward. Mouth-parts of the Squash Bug.—The mandibles and maxillae are reduced to needle-like structures, the two innermost (the maxillae) are united to form a piercing tube. The needles fit in the groove of the. 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 Lochhead, William, 1864- [from old catalog]. Philadelphia, P. Blakiston's son & co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
