image:Zweiband Wespenschwebfliege Chrysotoxum bicinctum.jpg, thumbnail, Female ''Chrysotoxum bicinctum'' The genus ''Chrysotoxum'' (Meigen, 1803) consists of large, wasp-mimicking species. The adults are distinguished by very long antennae, oval abdomen with yellow stripes, and yellow patterns on the thoracic pleurae (sides of the Thorax (arthropod anatomy), thorax). The species of ''Chrysotoxum'' are chiefly Holarctic realm, Holarctic in distribution. . The species in this genus, are mostly very uniform in structure and colour and are separated with difficulty. Larvae are specialized in preying upon root aphids associated with ant nests.

Taxonomy

''Chrysotoxum'' is the only genus in the tribe Chrysotoxini Features common to this genus are: The head is slightly wider than the thorax. The eyes are more or less pubescent and are contiguous (contacting each other medially) in males and widely separated in females. They have a prominent or angular frons and antennae base, features best seen in profile. The face is slightly concave. The antennae are long and erect, inserted on the frontal angle, with the first two segments nearly equal, and the third one (flagellum) is three to six times longer than the previous ones. Abdomen strongly convex dorsally, very deeply margined. Abdomen strongly convex dorsally, very deeply margined. The wings have the median transverse vein located before the middle of the discal cell. The wing vein R₄₊₅ clearly dipped into cell r₄₊₅. There are many Chrysotoxum taxonomy concerns yet to be resolved due to the few morphological features available for species characterisation. Characters frequently used: the color of legs, the overall size, the connections between the various abdominal stripes and spots have been found to vary considerably within a species Differences in male terminalia, often of great diagnostic value in other genera are, so far, unhelpful among the majority of Chrysotoxum species.

Species

*''Chrysotoxum amurense, C. amurense'' Violovitsh, 1973 *''Chrysotoxum arcuatum, C. arcuatum'' (Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758) *''Chrysotoxum asiaticum, C. asiaticum'' Theodor Becker, Becker, 1921 *''Chrysotoxum bactrianum, C. bactrianum'' Violovitsh, 1973 *''Chrysotoxum bajkalicum, C. bajkalicum'' Violovitsh, 1973 *''Chrysotoxum baphyrum, C. baphyrum'' Walker, 1849 *''Chrysotoxum bicinctum, C. bicinctum'' (Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758) *''Chrysotoxum caucasicum, C. caucasicum'' Pius Sack, Sack, 1930 *''Chrysotoxum cautum, C. cautum'' (Moses Harris, Harris, 1776) *''Chrysotoxum chakassicum, C. chakassicum'' Violovitsh, 1975 *''Chrysotoxum chinook, C. chinook'' Shannon, 1926 *''Chrysotoxum cisalpinum, C. cisalpinum'' Camillo Rondani, Rondani, 1845 *''Chrysotoxum continum, C. continum'' Bezzi, 1915 *''Chrysotoxum coreanum, C. coreanum'' Shiraki, 1930 *''Chrysotoxum derivatum, C. derivatum'' Francis Walker (entomologist), Walker, 1849 *''Chrysotoxum elegans, C. elegans'' Hermann Loew, Loew, 1841 *''Chrysotoxum fasciatum, C. fasciatum'' (Otto Friedrich Müller, Müller, 1764) *''Chrysotoxum fasciolatum, C. fasciolatum'' (Charles De Geer, De Geer, 1776) *''Chrysotoxum festivum, C. festivum'' (Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758) *''Chrysotoxum flaveolum, C. flaveolum'' Violovitsh, 1973 *''Chrysotoxum flavifrons, C. flavifrons'' Pierre-Justin-Marie Macquart, Macquart, 1842 *''Chrysotoxum fratellum, C. fratellum'' Shannon, 1926 *''Chrysotoxum gracile, C. gracile'' Theodor Becker, Becker, 1921 *''Chrysotoxum graciosum, C. graciosum'' Violovitsh, 1975 *''Chrysotoxum grandis, C. grandis'' Shōnen Matsumura, Matsumura, 1911 *''Chrysotoxum hameleon, C. hameleon'' Violovitsh, 1973 *''Chrysotoxum impressum, C. impressum'' Theodor Becker, Becker, 1921 *''Chrysotoxum integrum, C. integrum'' *''Chrysotoxum intermedium, C. intermedium'' Johann Wilhelm Meigen, Meigen, 1822 *''Chrysotoxum kozhevnikovi, C. kozhevnikovi'' Smirnov, 1925 *''Chrysotoxum kozlovi, C. kozlovi'' Violovitsh, 1973 *''Chrysotoxum lanulosum, C. lanulosum'' Violovitsh, 1973 *''Chrysotoxum laterale, C. laterale'' Hermann Loew, Loew, 1864 *''Chrysotoxum latifasciatum, C. latifasciatum'' Theodor Becker, Becker, 1921 *''Chrysotoxum lessonae, C. lessonae'' Giglio-Tos, 1890 *''Chrysotoxum lineare, C. lineare'' (Johan Wilhelm Zetterstedt, Zetterstedt, 1819) *''Chrysotoxum lydiae, C. lydiae'' Violovitsh, 1964 *''Chrysotoxum montivagum, C. montivagum'' Violovitsh, 1973 *''Chrysotoxum octomaculatum, C. octomaculatum'' John Curtis (entomologist), Curtis, 1837 *''Chrysotoxum parmense, C. parmense'' Camillo Rondani, Rondani, 1845 *''Chrysotoxum parvulum, C. parvulum'' Violovitsh, 1973 *''Chrysotoxum perplexum, C. perplexum'' Charles Willison Johnson, Johnson, 1924 *''Chrysotoxum przewalskyi, C. przewalskyi'' Josef Aloizievitsch Portschinsky, Portschinsky, 1887 *''Chrysotoxum pubescens, C. pubescens'' Hermann Loew, Loew, 1864 *''Chrysotoxum radha, C. radha'' Violovitsh, 1971 *''Chrysotoxum radiosum, C. radiosum'' Shannon, 1926 *''Chrysotoxum ramphostoma, C. ramphostoma'' Mutin, 1999 *''Chrysotoxum rhodopense, C. rhodopense'' Drensky, 1934 *''Chrysotoxum robustum, C. robustum'' Josef Aloizievitsch Portschinsky, Portschinsky, 1887 *''Chrysotoxum rossicum, C. rossicum'' Theodor Becker, Becker, 1921 *''Chrysotoxum rubzovi, C. rubzovi'' Violovitsh, 1973 *''Chrysotoxum sackeni, C. sackeni'' Giglio-Tos, 1890 *''Chrysotoxum sapporense, C. sapporense'' Shōnen Matsumura, Matsumura, 1916 *''Chrysotoxum sibiricum, C. sibiricum'' Hermann Loew, Loew, 1856 *''Chrysotoxum skufjini, C. skufjini'' Violovitsh, 1973 *''Chrysotoxum stackelbergi, C. stackelbergi'' Violovitsh, 1953 *''Chrysotoxum stenolomum, C. stenolomum'' Violovitsh, 1973 *''Chrysotoxum subbicinctum, C. subbicinctum'' Violovitsh, 1956 *''Chrysotoxum testaceum, C. testaceum'' Pius Sack, Sack, 1913 *''Chrysotoxum triarcuatum, C. triarcuatum'' Pierre-Justin-Marie Macquart, Macquart in Webb & Berthelot, 1839 *''Chrysotoxum verae, C. verae'' Violovitsh, 1973 *''Chrysotoxum vernale, C. vernale'' Hermann Loew, Loew, 1841 *''Chrysotoxum verralli, C. verralli'' James Edward Collin, Collin, 1940 *''Chrysotoxum villosulum, C. villosulum'' Jacques-Marie-Frangile Bigot, Bigot, 1883 *''Chrysotoxum willistoni, C. willistoni'' Charles Howard Curran, Curran, 1924 *''Chrysotoxum ypsilon, C. ypsilon'' Samuel Wendell Williston, Williston, 1887

References

{{Taxonbar, from=Q1767522 Hoverfly genera Syrphinae Taxa named by Johann Wilhelm Meigen