. The Australian zoologist. Zoology; Zoology; Zoology. NICHOLSON. ei. Text-fig:. 2. Antennae of Mimetic and other Stratiomyiidae (x8). B. non-mimetic, A. and C. possibly mimetic in habit, remainder mimetic. A. Hermetia Ulueens F., B. Odontomyia decipiens Guer., C. Neoexaireta spinigera 'Wied., D. Syndipnomyia sp., E. Elissoma Inula "White, F. Elissoma sp., G. Hassicyta picta Brauer. the normal type of this group and its slight resemblance to a wasp would permit of the commencement of the operation of natural selection in the production of mimetic resemblance. Syndipnomyia sp. (Text-fig. 2
. The Australian zoologist. Zoology; Zoology; Zoology. NICHOLSON. ei. Text-fig:. 2. Antennae of Mimetic and other Stratiomyiidae (x8). B. non-mimetic, A. and C. possibly mimetic in habit, remainder mimetic. A. Hermetia Ulueens F., B. Odontomyia decipiens Guer., C. Neoexaireta spinigera 'Wied., D. Syndipnomyia sp., E. Elissoma Inula "White, F. Elissoma sp., G. Hassicyta picta Brauer. the normal type of this group and its slight resemblance to a wasp would permit of the commencement of the operation of natural selection in the production of mimetic resemblance. Syndipnomyia sp. (Text-fig. , and PI. i., fig. 7) be- longs to a widely separated subfamily, the Clitellarinae, and in this species the first, as well as the terminal, segment is very elongate, and the constituent segments of the terminal segment are uniform and of almost equal length. As far as I am aware, all other types of stratiomyiids have short normal brachy- eerous antennae (Text-figs. and C). The species of Systropus shown in PI. ii., fig. 5, and Text-fig. has con- spicuously long antennae, consisting of a very long first segment and moderately long second and terminal segments. This is the only truly mimetic bombyliid I know, and it is also the only bombyliid I know which has very long antennae. In the Syrphidae long antennae are also found closely associated with those species in which mimetic resemblance is most highly developed. Most, if not all, the species of the Cerioidinae showT definite mimetic resemblance and long an- tennae are the rule in this subfamily. In most species the antennae are borne on the end of a long frontal prominence, which gives the appearance of great length to the antennae which are otherwise quite long (Text-fig. , and PL i., figs. 15, 18 and 32). The length of the antennae of Cerioides breviscapa (Text- fig. , PI. i., fig. 13) is due to the elongation of the first, second and terminal segments, the frontal process being very short in this species
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1914
