Dichotropis amboinensis Muir, 1913

Zelazny, B. & Webb, M. D., 2011, 3071, Zootaxa 3071, pp. 1-307 : 32

Dichotropis amboinensis Muir, 1913

Dichotropis amboinensis Muir, 1913: 84 , plate I, Fig. 20, plate III Fig.6

Decora vettius Fennah, 1970: 65 , Figs. 69–74 syn. nov.

( Figs. 17, 146)

Redescription. Forewings 1.9 times longer than wide, length: male 3.8–5.1 mm (mean = 4.6, n= 11), female 3.9– 4.4 mm (mean = 4.1, n= 8). Colour stramineous to light brown, some specimens tinted with green; margins of facial carinae, rostrum, middle of pronotum and tibiae may be tinted with orange. Forewings white, powdered; a black mark, of variable shape, near hind margin distad of clavus; apical cross-veins may be lined with infuscation. Facial carinae well separated; subantennal processes and lateral carinae of pronotum well developed; antennae small, ellipsoid, just reaching lower margin of eyes; rostrum reaching abdomen. Forewings with Sc+R fork near or just before its middle; Ms1a touching Cu1. Male genitalia with two long lateral processes on anal segment. Genital styles truncated apically; proximal dorsal process small, its pointed tip curved inwards; base of distal dorsal process wide, nearly rectangular, apical part turned outwards; at the inside near the base a finger-like process bearing bristles at the tip. Apical part of aedeagus elongated, flat, at the apex extended on the left side; on the right side bearing two small dorsal lobes.

Etymology. Derived from Amboina (the old name for the Indonesian island of Ambon), the latinized species name ( amboinensis , -ensis, -ense) is an adjective.

Type material. Dichotropis amboinensis , lectotype ♂ (designated by Zelazny 1981: 263) (forewing 3.8 mm), INDONESIA: Ambon Isl.; labels: 1) Amboina/ F. Muir 2) TYPE OF / Dichotropis 3) TYPE OF / D. amboinensis / Muir 4) Decora / amboinensis/ Kirk. 5) 589 ( BPBM #5149). Decora vettius , holotype, ♂ (forewing 4.5 mm), PAPUA NEW GUINEA; labels: 1) Papua: Kokoda, 1,200 ft. viii 1933. L.E. Cheesman. B.M. 1933-427 ( BMNH).

Note. Muir described this species from 4 specimens, a male and a female from Ambon I. ( Indonesia), a male from Larat I. ( Indonesia, near Tanimbar) and a female from Laloki (apparently near Port Moresby in Papua and New Guinea). The BPBM contains only the ♂ from Ambon .

Other material examined. PAPUA NEW GUINEA: NEW IRELAND, Schleinitz Mts., Lelet Plateau , X.1959, 4 ♂, W.W. Brandt ; NEW BRITAIN, Gazelle Pen., Bainings, St. Paul's , 350 m, 5.IX.1955, 1 ♂, J.L. Gressitt; PAPUA, Wau , 1200 m, 29. VII.1971, 1 ♂, J. Sedlacek, on Evodia ; Sepik, Angoram , 20–30 m, 14–16.VIII.1969, 1 ♀, J.L. Gressitt; W. District, Oriono Govt. Sta., 26–28.X.1960, 1 ♀, J.L. Gressitt, Malaise trap; Daradae Pl'n, 500 m, 80 km N. to Port Moresby, 7.IX.1959, 1 ♀, T. C. Maa, sweeping; Nabire, 5–50 m, 25.VIII–2.IX.1962, 2 ♀, H. Holtmann, light trap, in jungle (all BPBM); SE, Moroka , 1300m, VII –XI.1893 1 ♀, Loria ( MMBC) ; INDONESIA: PAPUA: Waris, S. of Hollandia, 450–500 m, 16–23.VIII.1959, 1 ♂, T. C. Maa; Hollandia, 13.III.1960, 1 ♂, T. C. Maa, sweeping; Hollandia area, W. Sentai, Cyclops Mts. , 150–250 m, 20.VI.1959, 1 ♀, T. C. Maa; SOLOMON ISL: Guadalcanal, Gold Ridge, 500 m, 25.VI.1956, 1 ♂, J.L. Gressitt; San Cristobal, Kira-Kira, 0–50m, 10.XI.1964, 1 ♀, R. Straatman, light trap ; AUSTRALIA: N. T., Darwin , 24.IX.1958, 1 ♂, J.L. Gressitt (all BPBM) .

Distribution. Philippine Isl. ( Zelazny, 1981), Indonesia (Maluku), New Guinea, New Britain, New Ireland, Solomon Isl., Australia (Northern Territory).

Diagnosis. Dichotropis amboinensis is characterized by the black mark on the forewings and the simple apical part of the male aedeagus.