A review of the New Caledonian Arpactophilus (Hymenoptera: Crabronidae) Author Breitkreuz, Laura C. V. Author Ohl, Michael Author Engel, Michael S. text Zootaxa 2016 4063 1 1 66 journal article 37206 10.11646/zootaxa.4063.1.1 9608b695-6310-4c63-bd94-46bda058e6d8 1175-5326 270412 80401ED8-C6BA-4420-9109-854C5CC1E88D Arpactophilus webbi Bohart, 1999 ( Figs. 105–106 ) Arpactophilus webbi Bohart, 1999 : 109 [♀: holotype MNHN]. Diagnosis. Arpactophilus webbi is the only New Caledonian species in the genus with the combination of a long ventral tooth on the yellow mandible (about 1/3 of mandibular length) and a yellow clypeus with three teeth on the apical margin (including both sides; medial tooth smaller than lateral) ( Fig. 105 ). Other distinctive characters are the projecting yellow clypeus with six teeth (including both sides) and the dense, short, goldish setae on the frons ( Fig. 105 ) Remarks. Arpactophilus webbi seems most similar to A. xaracuu as both share the elongate mandibles (not as extensive in A. webbi ), the apical clypeal margin with three teeth and the strongly projecting labrum with 6 teeth ( Figs. 105 , 107 ). However, the two species can easily be distinguished by the almost completely black (partially reddish) body of A. xaracuu ( Figs. 107–108 ) in comparison to the extensively yellow marked clypeus, labrum, mandible, antenna, pronotal lobe and legs of A. webbi ( Figs. 105–106 ). Material examined. 3♀: ( 1x ) PARATYPE Bohart 1999 “ NEW CALEDONIA Prov. Nord Mt. Mandjelia, 6km WSW Ecebo Malaise in rainforest; el. 545m , 18/ 19 January 1995 ME Irwin, DW Webb 20°24’09”S , 164°30’54”E ” [ UCDC ]; ( 1x ) “ NEW CALEDONIA Pouebo 23.I.1964 ; R. Straatman, light trap, BISHOP” [ BPBM ]; ( 1x ) “Nouvelle Calédonie, Mont Koghis. 350m , 25.IV.1995 , Réc. Chazeau & Jourdan” [ CAS ].