GENERA AND SUBGENERA OF BEES—SANDHOUSE 605 
Toba HoLMBERG, nomen nudum. 
Bol. Acad. Nac. Ciene. Cérdoba, vol. 10, p. 226, 1887. 
Townsendiella CRAWFORD. 
Insecutor Inscitiae Menstruus, vol. 4, pp. 186 and 188, 1916. 
Type.—Townsendiella pulchra CRAWFORD, 1916. (Monobasic.) 
Trachandrena ROBERTSON. 
Trans. Amer. Ent. Soc., vol. 28, pp. 187 and 189, 1902. Eleven species. 
Type.—Andrena rugosa RoBertson, 1891. (Original designation. ) 
Trachina Kiva. 
Magazin fiir Insektenkunde, vol. 6, p. 226, 1807. Three species. 
Type.—Centris longimana Fasricrus, 1804. (By designation of Cockerell, 
Trans. Amer, Ent. Soc., vol. 32, p. 105, 1906.) 
Synonym of Centris Fabricius, according to Dalla Torre, Catalogus Hymen- 
opterorum, vol. 10, p. 802, 1896. 
(Trachusa JURINE) =Stelis PANZER. 
Erlangen Litteratur-Zeitung, vol. 1, p. 164, 1801. Seven species. 
Type.—(Apis aterrima PANzER, 1798, not CuHristT, 1791)= Apis punctulatis- 
sima Kirpy, 1802. (By designation of Morice and Durrant, Trans. Ent. 
Soc. London, p. 426, 1915.) 
Isogenotypic with Stelis Panzer, Gyrodroma Klug, Gymnus Spinola, and 
Ceraplastes Gistel. 
Invalid under Opinion 135 of the International Commission on Zoological 
Nomenclature. 
Trachusa Panzer (=—Diphysis LEPELETIER). 
Faunae insectorum Germaniae initia, vol. 8, Heft. 86, expl. pl. 14-15, 1804. 
Two species. 
Type.—(Trachusa serratulae PANZER, 1804) =Apis byssina PANzZER, 1798. (By 
present designation.) “Rigidly construed” neither Schenck, Jahrb. Ver. 
Naturk. Herzogthum Nassau, vol. 16, p. 187, 1861; Jahrb. Nassau. Ver. 
Naturk., vol. 21-22, p. 325, 1867-68 [1870], nor Morice and Durrant, Trans. 
Ent. Soe. London, p. 427, 1915, designate serratulae as type of Trachusa 
Panzer. 
Isogenotypic with Diphysis Lepeletier through synonymy. 
Trichanthidium COCKERELL. 
Rey. Zool. Bot. Africaines, vol. 19, p. 52, 1930. 
Type.—Pachyanthidium (Trichanthidium) occipitale CocKERELL, 1930. 
(Monobasic. ) 
Proposed as a subgenus of Pachyanthidium Friese. 
Trichocerapis COCKERELL. 
Ent. News, vol. 15, p. 292, 1904. 
Type.—Tetralonia mirabilis F. SmirH, 1865. (Monobasic and original 
designation. ) 
Trichocolletes COCKERELL. 
Entomologist, vol. 45, p. 176, 1912. 
Type.—Lamprocolletes venustus F. Smite, 1862. (Monobasic and original 
designation. ) 
(Trichostoma Datta Torre) for Thrinchostoma SAUSSURE. 
Catalogus hymenopterorum, vol. 10, p. 381, 1896. 
Trichota M@&HELY. 
Naturgeschichte der Urbienen, pp. 63 and 169, 19385. Two species. 
Proposed as a subgenus of Prosopis Fabricius, but invalid under Article 25c¢ 
of the International Rules of Zoological Nomenclature, since no type was 
designated. 
