. Annual report. Entomological Society of Ontario; Insect pests; Insects. A study of the head of the perfect moth shows that it is composed of several distinct chitinous pieces protecting the nervous ganglia, and covering the mouth parts which are only fitted to take in liquid food. At the base of the spiral tongue (spirilingua) are placed the jointed maxillary palpi, (Fig. 35) but these are often, perhaps usually obsolete; they are well developed in the snout moths or Pyralidce, and especially in certain Tineidce. On the other hand all moths possess one pair of labial palpi, jointed appen- da
. Annual report. Entomological Society of Ontario; Insect pests; Insects. A study of the head of the perfect moth shows that it is composed of several distinct chitinous pieces protecting the nervous ganglia, and covering the mouth parts which are only fitted to take in liquid food. At the base of the spiral tongue (spirilingua) are placed the jointed maxillary palpi, (Fig. 35) but these are often, perhaps usually obsolete; they are well developed in the snout moths or Pyralidce, and especially in certain Tineidce. On the other hand all moths possess one pair of labial palpi, jointed appen- danges, analogous to the legs in ultimate structure and articulated to the lower lip or labium. The space between the eyes is called the front or clypeus, and this piece varies in comparative shape and size in the differ- ent families, and often affords peculiar structure offer- ing generic characters. In the genus Eudryas, for example, (Fig. 36) it is smooth, and in the related genus Gopidryas it is provided with a clypeal horn. The compound eyes vary in shape and external appearance. They are sometimes constricted, as in certain Heliothid genera in the Owlet moths. Again the surface, usually naked, is covered with short hairs arising from the angles of the facets apparently, and only to be properly observed under the microscope. Behind the eyes the small ocelli, or simple eyes, are to be found ; these are never more than two in number, and are sometimes wanting, as in the genus JBrephos. The antenna?, or " feelers," are situated on the top of the head on each side, and spring out between the vertex and epicranium. The basal joint is often thickened and longer than the rest. Up to 100 joints have been rounted in the antennae of some moths. They vary much in ultimate structure and exhibit sexual peculiarities,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these i
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
