592 PROCEEDINGS OF THE NATIONAL MUSEUM you. 9 
Protobombus CocKERELL [fossil]. 
Schrift. phys.-dkon. Ges. Kiénigsberg, Jahrg. 50, pp. 7 and 9, 1909. 
Type.—Protobombus indecisus CocKERELL, 1909. (Monobasic and original 
designation. ) 
Protodiscelis BRETHES. 
Anal. Mus. Nac. Buenos Aires, vol. 19 (ser. 3, vol. 12), p. 245, 1909. 
Type.—Protodiscelis fiebrigi BRirHES, 1909. (Monobasic.) 
Protomelecta CocKERELL [fossil]. 
Ann. Mag. Nat. Hist., ser. 8, vol. 1, p. 841, 1908. 
Type.—Protomelecta brevipennis CocKERELL, 1908. (Monobasic.) 
Protomelissa FRIESE. 
Deutsche Ent. Zeitschr., p. 322, 1914. Two species. 
Type.—Protomelissa iridescens Friese, 1914. (Present designation.) 
Protomeliturga DUCKE. 
Zool. Jahrb., Abt. Syst., Jena, vol. 34, pp. 63 and 90, 1912. 
Type.—Calliopsis turnerae Duckr, 1907. (Monobasic.) 
Protosmia DUCKE. 
Ber. naturw.-med. Ver., Innsbruck, vol. 25, p. 12, 1900. Ten species. 
Type.—Heriades glutinosus Grraup, 1871. (Present designation. ) 
Proposed as a subgenus of Osmia Panzer. 
Protostelis FRIESE. 
Die Bienen Europas, vol. 1, p. 25, 1895. Four species. 
Type.—Stelis freygessneri Friese, 1885. (By designation of Popov, Konowia, 
vol. 17, p. 41, 1938.) 
Proposed as a subgenus of Stelis Panzer. 
Synonym of Stelis Panzer, according to Popov, Tray. Inst. Zool. Acad. Sci. 
U. RB. 8. S., vol. 1, p. 379, 1933. 
Protoxaea CoCKERELL and PORTER. 
Ann. Mag. Nat. Hist., ser. 7, vol. 4, p. 410, 1899. 
Type.—(Megacilissa) Oxaea gloriosa Fox, 1893. (Monobasic and original 
designation. ) 
Proxylocopa HEDICKE. 
Deutsche Ent. Zeitschr., p. 192, 1938. Seven species. 
Type.—X yiocopa olivieri LEPELETIER, 1841. (Original designation.) 
Proposed as a subgenus of Xylocopa Latreille. 
Psaenythia GERSTAECKER. 
Arch. Naturg., vol. 34, p. 111, 1868. Ten species. 
Type.—Psaenythia philanthoides GERSTAECKER, 1868. (Present designation.) 
Pseudagapostemon ScHROTTKY. 
Rey. Mus. La Plata, vol. 16 (ser 2, vol. 3), p. 145, 1909. 
Type.—Agapostemon arenarius ScuroTrKy, 1902. (Monobasic and original 
designation. ) 
Pseudapis W. F. Kirsy. 
Bull. Liverpool Mus., vol. 3, p. 15, 1900 [reference not seen]. 
Type.—Pseudapis anomala W. F. Kirsy, 1900. (Monobasic.) 
Genotype transferred to Nomia Latreille by Kohl, Denkschr. Kais. Akad. 
Wiss., vol. 71, p. 176, 1907. 
Synonym of Nomia Laitreille, according to Meade-Waldo, Ann. Mag. Nat. Hist., 
ser. 8, vol. 17, p. 454, 1916. 
