Trachusa ( Archianthidium ) Mavromoustakis, 1939: 91 Anthidium laticeps Morawitz, 1874 Trachusa ( Congotrachusa ) Pasteels, 1969: 24 Anthidium schoutedeni Vachal, 1910 Trachusa ( Heteranthidium ) Cockerell, 1904: 292 Anthidium dorsale Lepeletier, 1841 Trachusa ( Legnanthidium ) Griswold & Michener, 1988: 27 Anthidium ridingsii Cresson, 1878 Trachusa ( Metatrachusa ) Pasteels, 1969: 22 Anthidium pendleburyi Cockerell, 1927 Trachusa ( Orthanthidium ) Mavromoustakis, 1953: 837 Anthidium formosanum Friese, 1917 Trachusa ( Paranthidium ) Friese, 1898: 101 Apis interrupta Fabricius, 1781 Cockerell, 1909: 269 Trachusa ( Trachusa ) Trachusa Panzer Trachusa serratulae Panzer, 1804 Apis byssina Panzer, 1798 Sandhouse, 1943: 605 Trachusa ( Trachusomimus ) Popov, 1964: 406 Trachusa perdita Cockerell, 1904 Trachusa ( Ulanthidium ) Michener, 1948: 13 Ulanthidium mitchelli Michener, 1948 Overview of the bee genus Trachusa Panzer, 1804 (Hymenoptera: Apoidea Megachilidae: Anthidiini) from China with description of three new species Niu, Ze-Qing Ascher, John S. Orr, Michael C. Griswold, Terry Zhu, Chao-Dong Zootaxa 2019 2019-07-24 4646 2 251 270 63VYL Panzer, 1804 Panzer 1804 [151,432,1722,1749] Insecta Megachilidae Trachusa Animalia Hymenoptera 1 252 Arthropoda genus     Trachusa( Archianthidium): Archianthidium  Mavromoustakis, 1939: 91. Typespecies:  Anthidium laticeps Morawitz, 1874, by original designation.  Trachusab( Congotrachusa):  Trachusa( Congotrachusa) Pasteels, 1969: 24. Typespecies:  Anthidium schoutedeni Vachal, 1910, by original designation.    Trachusa( Heteranthidium):  Anthidium( Heteranthidium)  Cockerell, 1904: 292. Typespecies:  Anthidium dorsale Lepeletier, 1841, by original designation.    Trachusa( Legnanthidium):  Trachusa( Legnanthidium)  Griswold & Michener, 1988: 27. Typespecies:  Anthidium ridingsii Cresson, 1878, by original designation.    Trachusa( Metatrachusa):  Trachusa( Metatrachusa)  Pasteels, 1969: 22. Typespecies:  Anthidium pendleburyi Cockerell, 1927, by original designation.    Trachusa( Orthanthidium):  Paraanthidium( Orthanthidium)  Mavromoustakis, 1953: 837. Typespecies:  Anthidium formosanum Friese, 1917, by original designation.    Trachusa( Paranthidium):  Anthidium( Paraanthidium)  Friese, 1898: 101. Typespecies:  Apis interrupta Fabricius, 1781, by designation of  Cockerell, 1909: 269.    Trachusa( Trachusa):  TrachusaPanzer s. str., 1804: expl. pl. 14–15. Typespecies:  Trachusa serratulae Panzer, 1804=  Apis byssina Panzer, 1798, by designation of  Sandhouse, 1943: 605.    Trachusa( Trachusomimus): Trachusomimus  Popov, 1964: 406. Typespecies:  Trachusa perdita Cockerell, 1904, by original designation.    Trachusa( Ulanthidium):  Ulanthidium  Michener, 1948: 13. Typespecies:  Ulanthidium mitchelli Michener, 1948, by original designation.   Diagnosis:The genus  Trachusa Panzer, 1804consists of moderate-sized to large megachiliform anthidiine bees, the body length of which varies from 8.5 mmto 20 mm. A carina on the pronotal lobe and the omaulus is often absent, but if present may take the form of a lamella ( Kasparek, 2017). The posterior part of the head is well-developed, thus the OOD (ocellocular distance) is shorter than the OCD (ocelloccipital distance) except equal in the subgenus  Metatrachusa. The anterior of the median ocellus is closer to the antennal bases than to the posterior margin of the vertex (Grisword & Michener, 1988). The middle tibia is broad, usually nearly as broad as the hind tibia, and both the anterior and posterior margins of the middle tibia are convex. Despite these convexities, the middle tibia is sometimes distinctly narrower than the hind tibia ( Michener, 2007). Fore- and mid-tibial spines are produced as blunt, obtuse projections that extend along the tibial surface as carinae ( Griswold & Michener, 1988). Vein cu-v of the hind wing is oblique and usually nearly half as long as the second abscissa of M+Cu or longer ( Kasparek, 2017). Arolia between the claws are usually present but sometimes greatly reduced or absent ( Kasparek, 2017). Black combs on the underside of S4 and S5 of the male are present in some species ( Kasparek, 2017). The male T7 is small and curved under the abdomen so that the dorsal surface faces ventrally ( Michener, 2007). Females typically have four mandibular teeth but sometimes three, or five, six or seven ( Michener, 2007). The number of segments in the maxillary palpus is four or reduced to three ( Kasparek, 2017).