. Elementary zoology. Zoology. 172 ELEMENTARY ZOOLOGY Note on the head the large compound eyes. Note the tumid convex clypeus which composes most of the anterior aspect of the head. Are ocelli present ? Compare the antenna? with those of the locust and water-beetle. Com- pare also the month-parts and note that they differ radi- cally from those of the locust and beetle. They are not fitted for biting, but for sucking up liquid food (the nectar of flowers). Note the absence of a movable flap-like labrum (a minute narrow stiff piece, bearing at each lateral. compound eye, antennae prothorax labi
. Elementary zoology. Zoology. 172 ELEMENTARY ZOOLOGY Note on the head the large compound eyes. Note the tumid convex clypeus which composes most of the anterior aspect of the head. Are ocelli present ? Compare the antenna? with those of the locust and water-beetle. Com- pare also the month-parts and note that they differ radi- cally from those of the locust and beetle. They are not fitted for biting, but for sucking up liquid food (the nectar of flowers). Note the absence of a movable flap-like labrum (a minute narrow stiff piece, bearing at each lateral. compound eye, antennae prothorax labial palpi proboscis tarsal segments Fig. 41.—Body of the monarch butterfly, Anosia plexippus, with scales re- moved to show the external parts. end a small group of fine brown hairs, represents the labrum), the entire absence of mandibles, and the absence of a movable flap-like labium. The labium is a fixed chitinized triangular piece forming part of the floor of the head. Note the long slender proboscis coiled up like a watch-spring. (In fresh specimens this proboscis can be uncoiled and will be found flexible. If dried or alcoholic specimens are being studied, the head of the butterfly. 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York : H. Holt and company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
