A Revision of Afrotropical Thrinchostoma de Saussure, 1890 (Hymenoptera: Apoidea: Halictidae) Author Pauly, Alain Author Eardley, Connal text Belgian Journal of Entomology 2013 12 1 76 journal article 10.5281/zenodo.13486944 2295-0214 13486944 818D4F00-C92C-4197-AB74-6213610CB945 Thrinchostoma (Diagonozus) lettowvorbecki Blüthgen, 1930 ( Figs 16 , 17 , 18 , 19b ) Thrincostoma [!] (Diagonozus) lettow-vorbecki Blüthgen, 1930: 497 , 499, 503, 522, 536, ♂ , ♀ . Male holotype : R.D. Congo , Barumbu , 12.XI.1913 , sur fleurs de Costus n°1169, leg. Dr. Bequaert (RMCA). Thrinchostoma (Diagonozus) lettow-vorbecki Blüthgen : Michener, 1978: 525 . Thrinchostoma lettow-vorbecki Blüthgen : Cockerell, 1933: 24 . Thrinchostoma (Diagonozus) lettowvorbecki (Blüthgen) : Pauly, 1999: 156, 174. Thrincostoma [!] (Diagonozus) guineense Blüthgen, 1930: 536 , ♂ . Male holotype : Equatorial Guinea « Spanish Guinea », Uelleburg , Benitogebiet , 1-14.II.1907 , leg. Tessmann (MNHUB). Syn. nov . Thrinchostoma (Diagonozus) guineensis Blüthgen : Michener, 1978: 525 ; Pauly, 1999: 156, 173. Thrinchostoma (Diagonozus) ghesquieri Cockerell, 1933: 24 , ♂ . Male holotype : R.D. Congo , Yangambi, I.1925 , leg. Lt. J. Ghesquière (RMCA). Michener, 1978: 525 ; Pauly 1999: 156, 173, syn.; Michener, 2000: 374 . NOTE : According to BLÜTHGEN (1930) T. guineensis may be simply a variety of T. lettowvorbecki and we preferred to consider it as a synonym because the differences are minimal. DIAGNOSIS . The male differs from T. bicometes only by segments 8 to 11 of the antennae having notches and by the antennae being with fewer curved segments. The female differs from all other Thrinchostoma by its long malar area (fig. 18a). Fig. 16. Thrinchostoma (Diagonozus) lettowvorbecki , male (Congo-Brazzaville: Odzala) and female (Ivory Coast: Thai National Park). MATERIAL . IVORY COAST . Guiglo , Park National de Taï , 12 km E. of Pauleoula , 20.VIII.1983 , 1♀ , leg. R.T.A. Schouten & J.R.M. Buijsen ( ITZA ) . D.R. CONGO . Barumbu , 12.XI.1913 , sur fleurs de Costus n°1169, 1♀ ( paratype ), leg. Dr. Bequert ( RMCA ) . – Eala , 7.VIII.1935 , 1♂ , leg. J. Ghesquière ( RMCA ) . CONGO-BRAZZAVILLE. Odzala, Bordure de route près cases abandonnées, 8.II.1977 , 1♂ , leg. S. Kelner Pillault ( MNHNP ) .