. The Cambridge natural history. Zoology. PUPA 327 the body being glued together by an exudation so as to form a single continuous outer skin. Tliis form of perfect pupa is called " pupa ; The obtected pupa is exhibited in various stages of perfection in the Lepidoptera; the maximum of perfection is attained by the pupae of such butterflies as are exposed without protection or concealment; on the other hand, we find in various small moths conditions of the p)upa that do not differ in any marked manner from the pupae of Insects of other Orders. Moreover, certain Coleoptera and
. The Cambridge natural history. Zoology. PUPA 327 the body being glued together by an exudation so as to form a single continuous outer skin. Tliis form of perfect pupa is called " pupa ; The obtected pupa is exhibited in various stages of perfection in the Lepidoptera; the maximum of perfection is attained by the pupae of such butterflies as are exposed without protection or concealment; on the other hand, we find in various small moths conditions of the p)upa that do not differ in any marked manner from the pupae of Insects of other Orders. Moreover, certain Coleoptera and Diptera exhibit obtected pupae of a more or less perfect kind. Hence the pupa obtecta is to be considered as a perfected condition that exists more frequently in the Lepidoptera than in other Orders. The pupa has no orifices to the alimentary canal or sexual Fig. 167.—Section of female pupa of Anosia plexipptis^ 3-4 days old. I, pro-, II, meso-. III, meta-thorax ; 1-9, abdominal seg- ments ; IS, anten- na (?) ; ac, aortal chamber ; ag^ - arj^^ abdominal ganglia ; ai/i, ^accessory glands ; ao, aorta ; &r, brain ; c, colon ; cp, bursa copulatrix ; c?-, cremaster ; f^, first femur ; fr, food-reservoir ; A, dorsal vessel ; i, part of intestine ; iiiv, Malpigliian tube ; inx, base of maxilla ; oe, oesophagus ; ov, ovary ; ph, pharynx; sd, salivary duct ; sgl, salivary gland ; st, stomach ; t}-, first tarsus ; tg, compound thoracic ganglion ; ts'-, fa', second and third (After Scudder.) organs, but the respiratory openings are pervious. It has no means of locomotion, but it can move a certain number of the posterior segments (the number variable according to kind). In some cases it is provided with spines, " adminicula," by means of which, aided by the wriggling movements of the abdominal seg- ments, considerable changes of position can be effected. The pupae of the genus Micropteryx apparently use the legs for locomotion, as do the pupae of Trichoptera. The
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
