. Coleoptera. Chrysomelidæ. Chrysomelidae; Beetles. JSTONARTHilA. 117 niedian band; in several specimens there is only a round sutural patch in the apical area and the edges of the elytra at the apex, ;and for a short distance forwards along the sides, are stained black. In some examples the elytra are almost entirely black, but exhibit obscure, dark red, transverse bands; this condition is probably transitional between the banded and the unicolorous black phases. The legs, except the apices of the femora, are frequently yellow-brown, while the rest of the under surface is black; sometimes the
. Coleoptera. Chrysomelidæ. Chrysomelidae; Beetles. JSTONARTHilA. 117 niedian band; in several specimens there is only a round sutural patch in the apical area and the edges of the elytra at the apex, ;and for a short distance forwards along the sides, are stained black. In some examples the elytra are almost entirely black, but exhibit obscure, dark red, transverse bands; this condition is probably transitional between the banded and the unicolorous black phases. The legs, except the apices of the femora, are frequently yellow-brown, while the rest of the under surface is black; sometimes the legs are entirely black; in many cases the hind tibiae are smoky, but the teeth on their outer edge are always darker. Any combination of the black markings described above is possible. The size of the insects also varies to some •extent. Since in some individuals the scutellum is black, while. Fig. 41.—Nonartkra variabilis, Baly. the rest of the upper surface is entirely red-brown, Jacoby called this form a new species (Enneamera scutellata), but I consider it a variety of N. variabilis, though perhaps a more definite and stable variety than some of the others which occur. In proposing the species albofasciata, Duvivier writes that this form looks slightly more elongate and larger and that he considers it to be a distinct species, but he ends his short description by expressing the doubt that the insect may after all be only a variety of N. variabilis. Duvivier also attempted to classify the varieties, but I think that, while it is possible to catalogue all the different combinations of yellow and black markings found in this insect, no useful purpose is served by doing so. In making the above remarks I have before -me about 120 examples, which show the high degree of variability of this 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 ma
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1919
