A revision of the Hawaiian and Wake Island species of the genus Conchopus Takagi (Diptera, Dolichopodidae) Author Masunaga, Kazuhiro Author Saigusa, Toyohei text Zootaxa 2010 2729 1 35 journal article 46903 10.5281/zenodo.200114 33cb2f17-6a23-42ce-97df-51f6327cfc1b 1175-5326 200114 Conchopus acrosticalis ( Parent, 1937 ) ( Figs. 1 , 2 , 3 , 18 a) Cymatopus acrosticalis Parent, 1937 : 69 . Williams, 1939 : 314 ; McKay, 1945 : 206 ; Hardy, 1952 : 454 ; Dyte, 1959 : 140 ; Sunose & Satô, 1994 : 655 . Paraphyrosylus acrosticalis (Parent) : Hardy & Kohn, 1964 : 251 . Conchopus acrosticalis (Parent) : Takagi, 1965 : 52 ; Masunaga et al., 2005 : 439 . Thambemyia acrosticalis (Parent) : Meuffels & Grootaert, 1984 : 152 ; Bickel & Dyte, 1989 : 406 ; Nishida, 1992 : 98 , 1994: 92, 1997: 78, 2002: 95; Yang et al. , 2006 : 255 . Diagnosis . Small-sized species ( 2.9–3.2 mm in body length) characterized by 1st flagellomere twice as long as thickness; halter yellow. In male, M1+2 not thickened, apical section of M3+4 2.4 times as long as discal crossvein; fore tarsomere 1 with small basal lobe 1/3 as long as tarsomere 1, rather weak ventral bristle at midlength, and weak apical swelling; longer dorsal bristle of fore tarsomere 2 at middle; mid tibia flattened, and with long erect bristles and setae on anterior and posterior surfaces; mid tarsomere 1 short setose; ventral lobe of hypopygium very broad on apical 1/2 and slightly longer than cercus. Material examined ( BPBM , LBM , BLKU ): Hawai’i : 1ɗ, Hilo, 23.iii.1967 , J.R. Vockeroth leg.; 4ɗ, Karapana Pk., 24.iii.1967 , J.R. Vockeroth leg.; 4ɗ4Ψ, Wailoku, wet rocks, 30.v.1970 , J.H. Tenorio leg.; 15ɗ, Honaunau, 14.xii.2002 , K. Masunaga leg. Maui : 2ɗ, Lahaina, 24.ix.1966 , T. Saigusa leg.; 28ɗ2Ψ, Kahana, 11.xii.2002 , K. Masunaga leg. L ā na‘i : 60ɗ, Kaiolohia Bay, 16.xii.2002 , K. Masunaga leg.; 9ɗ, Hulopoe Beach, 16.xii.2002 , K. Masunaga leg.; 13ɗ15Ψ, Hulopoe Beach, 17.xii.2002 , K. Masunaga leg.; 147ɗ120Ψ, Kaiolohia Bay, 17.xii.2002 , K. Masunaga leg. Moloka‘i : 10ɗ5Ψ, Waialua, 4.xii.2002 , K. Masunaga leg. Distribution . Hawaiian Islands (Hawai‘i, Maui, Läna‘i, Moloka‘i). Remarks . This species is most closely related to Conchopus ciliatus sp. nov. in having simple M1+2 and M 1 in both sexes, and the male of the latter has the following combination of characters different from those of C. acrosticalis : thicker pollinosity of mesonotum; basal lobe of fore tarsomere 1 larger and with many shorter marginal setulae; ventral lobe of hypopygium much shorter than cercus.