GENERA AND SUBGENERA OF BEES—SANDHOUSE 597 
Rhophitoides ScHENCK. 
Jahrb. Ver. Naturk. Herzogthum Nassau, Heft 14, pp. 29, 69, 171 and 207, 
1859. Two species. 
Type.—(Rhophitoides distinguendus ScHENCK, 1859)=—Rhophites canus 
Eversmann, 1852. (Monobasic.) 
Synonym of Rophites Spinola, according to Dalla Torre, Catalogus hymenop- 
terorum, vol. 10, p. 175, 1896. 
Rhophitulus DuckKeE. 
Zeitschr. Syst. Hym. Dipt., vol. 7, p. 866, 1907. Two species. 
Type.—Rhophitulus frisei [friesei] Duckr, 1907. (Present designation.) 
Rivalisia STRAND. 
Arch. Naturg., Jahrg. 87, Abt. A, Heft 3, p. 270, 1921. 
Type.—Rivalisia metallica STRAND, 1921. (Monobasic.) 
Probably is Augochlora F. SMITH, according to Bliithgen, Deutsche Ent. 
Zeitschr., p. 72, 1923. 
Robertsonella Titus. 
Journ. New York Ent. Soc., vol. 12, p. 22, 1904. 
Type.—(Robertsonella gleasoni Titus, 1904)=—(Heriades) Robertsonella 
simplex (CRESSON), 1864. (Monobasic and original designation. ) 
Robustobombus SKORIKOV. 
Bull. Sta. Région. Protect. Plantes Petrograd, vol. 4, p. 157, 1922. Five 
species. 
Type.—(Bombus) Alpigenobombus (Robustobombus) robustus (F. SmMirH), 
1854. (Present designation because of virtual tautonymy.) 
Proposed as a subgenus of Alpigenobombus Skorikovy. 
Rophites Sprnora (—Rhophites DALLA TorRE). 
Insectorum Liguriae species novae et rariores . . ., vol. 2, pp. 8 and 72, 1808. 
Type.—Rophites quinquespinosa SpInoLA, 1808. (Monobasic.) 
Rostratilapis FRIESE. 
Tijd. Mnt., vol. 57, p. 26, 1914. Two species. 
Type.—Halictus (Rostratilapis) macrognathus Friesg, 1914. (Present 
designation. ) 
Proposed as a subgenus of Halictus Latreille. 
Rubicundobombus SxkorIkov. 
Bull. Sta. Région. Protect. Plantes Petrograd, vol. 4, p. 154, 1922. Two species. 
Type—(Bombus) Fervidobombus (Rubicundobombus) rubicundus (F. 
SmiTH), 1854. (Present designation because of virtual tautonymy.) 
Proposed as a subgenus of Fervidobombus Skorikoy. 
Rufipedibombus SkKoRIKOV. 
Bull. Sta. Région. Protect. Plantes Petrograd, vol. 4, p. 156, 1922. 
Type.—(Bombus) Rufipedibombus rufipes (LEPELETIER), 1836. (Monobasic.) 
Sabulicola VERHOEFF. 
Ent. Nachr., vol. 16, pp. 328 and 386, 1890. 
Type.—Sabulicola cirsti VERHOEFF, 1890. (Monobasic.) 
Synonym of Sphecodes Latreille, according to Dalla Torre, Catalogus Hy- 
menopterorum, vol. 10, p. 1, 1896. 
Samba FRIESE. 
Deutsche Ent. Zeitschr., p. 568, 1908. 
Type—Samba calcarata FriesE, 1908. (Monobasic.) 
