. Guide leaflet. s a pupa. The Pupa. The pupa which escapes from the larval skin forms the next stage inthe development of the insect (Figs. 13 and 14). It too is aquatic in habit and ordinarily leads a brief and comparatively quietof Pupa n^e- I* ^oes not feed- When at rest, it floats at the surface of the water, breathing through a pair of funnel-like is, however, able to execute very rapid, though jerky, movements and 1 John B. Smith, N. J. State Agr. Exp. Station. Report on Mosquitoes, , 1905. - L. O. Howard. Mosquitoes, p. 44. DAHLGREN, THE MALARIA MOSQUITO H> darts downw
. Guide leaflet. s a pupa. The Pupa. The pupa which escapes from the larval skin forms the next stage inthe development of the insect (Figs. 13 and 14). It too is aquatic in habit and ordinarily leads a brief and comparatively quietof Pupa n^e- I* ^oes not feed- When at rest, it floats at the surface of the water, breathing through a pair of funnel-like is, however, able to execute very rapid, though jerky, movements and 1 John B. Smith, N. J. State Agr. Exp. Station. Report on Mosquitoes, , 1905. - L. O. Howard. Mosquitoes, p. 44. DAHLGREN, THE MALARIA MOSQUITO H> darts downward instantly when disturbed. If confined in a glass vessel,it may be seen on such occasions to strike the bottom repeatedly, return-ing to the surface of the water by its own buoyancy as soon as itsmovements cease. The downward swimming is accomplished by a fewvigorous strokes of the strongly curved abdomen, which hears at its tij>a pair of paddles, or flippers, and is the only freely movable pari ofthe FIG. 13 THE PUPA OF THE MALARIA MOSQUITO. FEMALE. Photograph of the model (/ 75) in the American Museum. Magnification ofthe figure about 15 diameters. Under the transparenl integument of the puj a may be seen outlinedthe body and appendages of the developing mosquito (Fig. 1 ^ Structure 15 . The head is drawn upagamsl theantenor part ol the 0f Pupathorax, giving the pupa its characteristic hunchbacked ap-pearance. The strongly flexed abdomen curves downward and forwardunder the thorax. The elongated mouth-parts, the proboscis of the 20 AMERICAN MUSEUM GUIDE LEAFLETS future fly, lie directed downward and backward in the median line,forming a keel just beneath the thorax. The legs are bent at theknee-joints and lie pressed against the thorax on each side, then theyturn backward and terminate in S-shaped curves under the fore part ofthe abdomen. They are partly concealed by the wings, which hang,cramped in their wing-cases, closely pressed against the body on eachside o
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
