Dichotropis amboinensis Muir, 1913

Dichotropis amboinensis Muir, 1913 View in CoL

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

Decora vettius Fennah, 1970: 65 View in CoL , 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.