Acara logische Aanteekeningen No LXIX 1922 Acan van Java Famihe Raphi gnathidaepp 113-120, No LXX 1923 pp 138-144, No LXXI p 145-155, No LXXII Wat is Acarus geniculatus Linne 1758 ? pp 177-188, No LXXIII pp 201-208 Entomologische Berichten Helder, 6 1923: Unpaginated. 206 [Zoological Record Volume 60]