. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. Fig. 7. Fig. 8. Fig. 7.—Labium of cricket, hyp., Hypopharynx; gl., glossa; pgl., paraglossa; pl., labial palpus; pg., palpiger; m., mentum; sm., submentum. Fig. 8.—The labrum-epipharynx of cricket. more difficult to determine their homology. The following descrip- tions will illustrate the typical arrangements in the three chief purely suctorial orders of insects. Three types occur in the Diptera—the piercing type, with all the mouth-parts present, , the female horse fly and mosqui
. Class book of economic entomology. Insects, Injurious and beneficial. [from old catalog]; Insects; Insects. Fig. 7. Fig. 8. Fig. 7.—Labium of cricket, hyp., Hypopharynx; gl., glossa; pgl., paraglossa; pl., labial palpus; pg., palpiger; m., mentum; sm., submentum. Fig. 8.—The labrum-epipharynx of cricket. more difficult to determine their homology. The following descrip- tions will illustrate the typical arrangements in the three chief purely suctorial orders of insects. Three types occur in the Diptera—the piercing type, with all the mouth-parts present, , the female horse fly and mosquito; the piercing type with some of the mouth-parts missing or fused, , the horn flies and stable flies, and the non- piercing type such as the house-fly and blow flies in which the beak is used for rasping and sucking. Mouth-parts of the Horse Fly (Tabanid).—The mouth-parts of the female are composed of six blades loosely ensheathed in the labium. 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
