. Coleoptera: Lamellicornia. Scarabaeidae. IXTHODUCTION. 15 vertex of the head in many beetles. There is darker pigment also at the edges of plates, especially wlieretwo edges have united, forming a highly chitinised suture, and this often remains as a dark line wlien all other trace of the suture has vanished. In- crease of the amount of pigment produced results in the dilatation of these colour-patches and their fusion in a variety of ways. Sexual Dimorphism. Tlie present subfamily is not, like the Dy^tastin^, the Coprin^, and the Lucanid^e, a group in which dimorphic forms are pre- dominant
. Coleoptera: Lamellicornia. Scarabaeidae. IXTHODUCTION. 15 vertex of the head in many beetles. There is darker pigment also at the edges of plates, especially wlieretwo edges have united, forming a highly chitinised suture, and this often remains as a dark line wlien all other trace of the suture has vanished. In- crease of the amount of pigment produced results in the dilatation of these colour-patches and their fusion in a variety of ways. Sexual Dimorphism. Tlie present subfamily is not, like the Dy^tastin^, the Coprin^, and the Lucanid^e, a group in which dimorphic forms are pre- dominant. Highly developed armatures, such as are familiar in those groups, are here found in a very few cases only ; but,, although not in its most exaggerated forms, Sexual Dimorphism can be studied with special advantage in the Eutelin^e, for there is perhaps no group of similar size in which it manifests itself in a greater variety of phases. This applies in a special degree to the Oriental 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 Arrow, G. J. (Gilbert John), 1873-1948. London, Taylor and Francis
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1910
