Genus Pseudachorutes Tullbg. 1892.
Pseudachorutes pacificus n.sp. (Text-fig. 1, d-h.)
Description: Length 2.6 mm. Colour dark brownish. Antennae as long as head, segments I : II : III : IV = 7 : 7 : 8 : 8; III and IV indistinctly separated; antennal organ III as in Fig. 1, e; IV with only small and indistinct terminal knob and with olfactory hairs not differentiated; antennal setae rather long. Ocelli 8 on each side on pigmented patches, equal. Postantennal organ about as large as a single omma, with central boss and four irregular peripheral lobes (see Fig.). Mandible present, styliform; head of maxillae as in Fig. 1, f. Claws with inner tooth in the basal third; no clavate tibiotarsal hairs. Furca well developed; dentes rather thick and a litle more than twice as long as mucro; mucro as in Fig. 1, h, dens plus mucro twice as long as claw; dens granular with a number of fine setae (see Fig.).
Locality: A single specimen from Brookby, Manurewa, Auckland, 27/8/32 (E. D. P.).
Remarks: This species is very closely related to Pseudachorutes javanicus Handschin from Java, with which form I was at first inclined to associate it. It differs, however, in the form of the sensory organ on antennae III, in the shape of the peripheral lobes of the postantennal organ and in the dens plus mucro being twice the length of the claw. In P. javanicus the claw is almost as long as the dens plus mucro. Moreover, the colour of Handschin's species is given as “carmine,” whereas our species is brown.
Pseudachorutes novae-zealandiae n.sp. (Tex-fig. 1, i-k.)
Description: Length 5.0 mm. Colour deep blue-black. Facies somewhat as in the genus Ceratrimeria with distinct pleural areas. Ocellar patch small, deeply pigmented; ocelli 8 on each side, equal; postantennal organ as large as a single omma, with 8–10 lobes and central boss. Antennae shorter than the head, segments I : II : III plus IV =8 : 10 : 20; III and IV indistinctly separated; sensory organ on III not seen; IV with short setae and 4–6 curved olfactory setae; apical lobe not seen. Mandibles styliform. Claw with inner tooth at about one-third; tibiotarsus with clavate hairs. Furca well developed; mucro one-third the length of claw, stout, with only
indistinct apical knob-like lobe with lines of fine granulations (Fig. 1, k); dentes granular with numerous granulations and six ventral fine setae and three times as long as mucro. Cuticle finely granular with few short fine setae.
Locality: in humus from Davies' Bush, Brookby, Manurewa, Auckland, 24/8/34 (E. D. P.).
Remarks: This species differs from all known New Zealand forms in the general facies, postantennal organ, claws and particularly the mucro.
Text-fig. I.—a: Polyacanthella parva n.sp. Antenna. b: Polyacanthella parva n.sp. Tibiotarsus and claw. c: Polyacanthella parva n.sp. Anal segment and spines from above. d: Pseudachorutes pacificus n.sp. Ocelli and p.a.o. e: Pseudachorutes pacificus n.sp. Antennal organ III. f: Pseudochorutes paoificus n.sp. Head of maxilla. g: Pseudachorutes pacificus n.sp. Claw and tip of tibiotarsus. h: Pseudachorutes pacificus n.sp. Mucro and dens. i: Pseudachorutes novae-zealandiae n.sp. Ocelli and p.a.o. j: Pseudachorutes novae-zealandiae n.sp. Tibiotarsus and claw, k: Pseudachorutes novae-zealandiae n.sp. Furca.