Perilampsis tetradactyla Munro, 1933

Meyer, Marc De, 2009, Taxonomic revision of the fruit fly genus Perilampsis Bezzi (Diptera, Tephritidae), Journal of Natural History 43 (39 - 40), pp. 2425-2463 : 2444-2445

Perilampsis tetradactyla Munro

( Figure 1G )

Perilampsis tetradactyla Munro, 1933, p. 40 .

Perilampsis tetradactyla Munro, 1939a (coloration, biology); Hardy, 1967 (comparison

Trirhithrum ); Munro, 1969 (morphology); Cogan and Munro, 1980, p. 530 (Afrotropical catalogue); Norrbom et al., 1999, p. 186 (world catalogue).

Diagnosis

Arista pubescent; scutum with one broad transverse band; postpronotum white; scutellum white; anatergite and katatergite completely white; legs yellow with femora dark; wing, anterior apical band complete, with subapical tooth into cell r 4+5, isolated from discal band, posterior apical band absent, discal band reaching posterior margin; abdomen mainly shining black-brown.

Description

Head. Antennal segments dark brown. Arista pubescent, longest rays at most twice the width of base of arista. Frons variable, usually ventral half yellow-white, dorsal part with transverse brown band along width of orbital setae and ocellar triangle; sometimes brownish part more extensive reaching downwards to antennal implant; sometimes ventral part more orange coloured. Two frontals, placed parallel to medial eye margin; two orbitals, placed slightly convergent with anterior orbital located more medially. Face white, dorsal third dark brown, sometimes completely brown. Occiput black-brown, only margins white.

Thorax. Scutum shining black-brown, more yellowish brown near transverse suture; dark dispersed pilosity, one broad transverse band with silvery pilosity and microtrichosity anteriorly of transverse suture. Postpronotum white. Anepisternum brown, with white band occupying posterodorsal part, its ventral margin reaching posteroventral corner or almost so; with pale pilosity except in posteroventral corner with few dark setulae; one anepisternal seta. Anatergite and katatergite white. Scutellum white. Subscutellum brown. Legs pale yellow, femora and anterior fifth of hind tibia black-brown, East African specimens with hind tibia more extensively brown coloured for anterior half.

Wing ( Figure 1G ). Wing bands brown, largely reduced. No basal spots or streaks, except for subbasal band. Anterior apical band covering cell r 1 completely except for small hyaline spot in apical end of cell and hyaline separation from discal band near pterostigma; covering cell r 2+3 only partially; with subapical tooth into cell r 4+5. Posterior apical band absent. Area between subbasal band and discal band hyaline. Discal band reaching posterior wing margin. R-M ratio 0.43–0.55.

Abdomen. Shining black-brown, posterior margin of tergite 2 with narrow greyish band, tergite 5 with small yellow patch posteromedially.

Female. As male. Female terminalia, oviscape about two-thirds of length of abdominal tergites, shining black-brown, with black pilosity. Aculeus as in Figure 3C , orange, flattened, about 6 times as long as broad, apex as in Figure 4A , strongly narrowed, pointed tip.

Body length. 2.60–4.20 mm; wing length 3.10–4.30 mm.

Material examined

Holotype. 3, SOUTH AFRICA, Durban , August 1930, W.E. Marriott, bait trap ( SANC).

Other material. KENYA: Uplands, September 1937, van Someren, bred ex Loranthus , 13 1♀ ( MHNG) ; 13 1♀ ( USNM) . SOUTH AFRICA: 13, Durban, 5–14.X.1933, W.E. Marriott, bait trap ( KMMA) ; Durban, Benmore, H.K. Munro, M 589 [= reared from fruits Loranthus cf. kraussianus , according to Munro’s notebooks], 13 1♀, May 1936 ( USNM) ; 1♀, June 1936 ( KMMA) ; 233 1♀, May 1936, M589 ( NMSA) ; 233 1♀, May 1936; 1♀, July 1936, both M589 ( BMNH) .

Hosts

All host records belong to Loranthus L. ( Loranthaceae ). Reared from Agelanthus kraussianus (Meisn.) Polhill and Wiens (cf material examined), and Loranthus sp (entry M 635 in Munro’s notebooks. Specimens not seen). See Munro (1939a) for details on the host plant.

Distribution

Kenya, South Africa.

Comments

The colour differences of the frons between tetradactyla and formosula , as indicated by Munro (1933), are unreliable since variable in tetradactyla . However, both species can be differentiated from other species with reduced wing banding by the separation between anterior apical band and discal band in tetradactyla and interruption of anterior apical band near end of vein R 2+ 3 in formosula .

Figures

Figure 1. Wings of Perilampis species. (A) amazuluana; (B) umbrina; (C) atra; (D) deemingi sp. nov.; (E) formosula; (F) incohata sp.n.; (G) tetradactyla. Notes: Aab, anterior apical band; Pab, posterior apical band; Sab, subapical band; Db, discal band; Sbb, subbasal band.

Figure 3. Aculeus of Perilampsis species. (A) atra; (B) deemingi sp. nov.; (C) incohata sp. nov.; (D) umbrina; (E) diademata; (F) decellei; (G) dryades; (H) pulchella; (I) furcata; (J) woodi.

Figure 4. Aculeus apex of Perilampsis species. (A) atra; (B) deemingi sp. nov.; (C) incohata sp. nov.; (D) furcata; (E) woodi; (F) umbrina; (G) diademata; (H) decellei; (I) dryades; (J) pulchella.