. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . ion and on page 133, bears a close resemblanceto the Monarch. Even after one knowS both butterflies it isnot easy in the field to distinguish the two. However, theresemblance is only sujjerficial, being confined to color. The MIMICRY, WITH EXAMPLES 121 real structural characters show thatthey belong to distinct sub-families It is the common impres-sion among naturahsts thatthe resemblance of thesetwo species ha
. Nature sketches in temperate America, a series of sketches and a popular account of insects, birds, and plants, treated from some aspects of their evolution and ecological relations . ion and on page 133, bears a close resemblanceto the Monarch. Even after one knowS both butterflies it isnot easy in the field to distinguish the two. However, theresemblance is only sujjerficial, being confined to color. The MIMICRY, WITH EXAMPLES 121 real structural characters show thatthey belong to distinct sub-families It is the common impres-sion among naturahsts thatthe resemblance of thesetwo species has beenbrought about bynatural this reason Ihave summed upthe leading fadsupon which thisassumption isbased, espe-cially as therehas beensome skep-ticism re-garding theaction ofselection inbringingabout theapparent mim-icry here wit-nessed. Inorder to pre-sent these factsin a readily appre-ciable form, briefsketches of the salieni,points are given of each ottheir respective life histories,placed side by side: MonarchAdult resembling Viceroy; visits flow-ers in same company with provided with black pouch onhind wings containing scent scalesor Caterjiillar of the Virrrni) hiitfer-flu on the leaf of heart-shaped wiltoiv. ViceroyAdult resembling Monarch; visitsflowers in same company withMonarch. Male rujt providedwith scent organ on hind wings. 122 NATURE SKETCHES IN TEMPERATE AMERICA Monarch Viceroy Egg unlike Viceroy, often parasitized Egg unlike Monarch in shape andby small hymenopterous insects, reticulations; often parasitized by Triehogramma intermedia. Triehogramma minuta and T. minu- tisaima, the two being hymenop- terouS| insects. Caterpillar when full grown presenting Caterpillar when full grown often lemon-yellow bands with shining mottled grayish and white (see black, and provided with a pair of plate illustration), supplied with fleshy filaments on second thoracic prothoracic and other spinous and seventh abdominal segments; tube
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjectins
