Citrogramma luteifrons, (DE MEIJERE, 1908)

Mengual, Ximo, 2012, The flower fly genus Citrogramma Vockeroth (Diptera: Syrphidae): illustrated revision with descriptions of new species, Zoological Journal of the Linnean Society 164 (1), pp. 99-172 : 147-148

CITROGRAMMA LUTEIFRONS ( DE MEIJERE, 1908)

Syrphus luteifrons de Meijere, 1908: 304 . Neotype: ♂, ZMAN, here designated. Type locality: Indonesia: Heuvelbivak, here restricted by neotype designation. de Meijere, 1908: 304, fig. 37; 1914: 157; Hervé-Bazin, 1923a: 25; Shiraki, 1930: 405, 410.

Olbiosyrphus luteifrons of Hervé-Bazin, 1926: 67; Frey, 1946: 163.

Citrogramma luteifrons of Thompson & Vockeroth, 1989: 442; Wyatt, 1991: 155.

Geographical distribution: Indonesia (West Papua, Sulawesi) .

Differential diagnosis: Species with different pleural pattern in males and females. Males with yellow face, posterior anepisternum yellow, anepimeron black, and metafemur mainly black, yellow on basal quarter to third ( Fig. 48 ). It differs from C. fumipenne in coloration of metafemur, abdominal pattern, and by the brownish macula on scutellum ( C. fumipenne has scutellum entirely yellow).

Females of C. luteifrons , collected from the neotype locality (Heuvelbivak, West Papua), have anepimeron yellow, slightly darker dorsally on posterior anepimeron, like females of C. luteopleurum . Females of both species are very similar, but they can be differentiated by the abdominal pattern, as pointed out in the key. Females of C. luteifrons have some black hairs on notopleuron and they key out with immature females of C. chola (couplet 31), but they differ in the coloration of lunule and frons, which is yellow in C. luteifrons ( Fig. 46 ) and dark in C. chola ( Fig. 82 ).

Remarks: de Meijere (1908) cited the type material as follows: ‘Neu-Guinea: Moroka, 1 ♂, Loria leg. (Mus. Genua)’. de Jong (2000) pointed out that ‘the male holotype from MCSN was lost in HNHM in 1956, and non-type specimens identified by de Meijere are in ZMAN’. After the study of the ZMAN material of C. luteifrons , a male was found with the following labels: ‘Z.NieuwGuinea/Lorentz 1909–10/ Heuvelbivak/ 800 m / 7–15.xi.09 ’ [fourth and fifth lines written vertically] ‘ Syrphus ♂ / luteifrons /det. de Meijere.’ (italics = handwritten, de Meijere). This specimen is here designated as the neotype to fix and ensure the universal and consistent interpretation of C. luteifrons .

In the original description of S. luteifrons, de Meijere (1908) wrote that the pleuron was mainly yellow except the ventral portion and a pair of dark brown maculae. These two dark maculae probably correspond to those on anterior section of posterior anepisternum and anepimeron; both areas are dark or black in the material studied from ZMAN.

Neotype male deposited in the Zoölogisch Museum Amsterdam (Universiteit van Amsterdam, The Netherlands) and labelled: ‘Z.NieuwGuinea/Lorentz 1909– 10/Heuvelbivak/ 800 m / 7–15.xi.09 ’ [fourth and fifth lines written vertically] ‘ Syrphus ♂ / luteifrons /det. de Meijere.’ (italics = handwritten, de Meijere) ‘ NEOTYPE / Citrogramma / luteifrons /det. X. Mengual 20 09 ’ [red, handwritten except fourth line].

Type locality: Indonesia: West Papua, Heuvelbivak , 800 m, 4°30′S, 138°45′E .

Material examined: Type material. Neotype, as above.

Nontype material. INDONESIA: West Papua, Heuvelbivak, 800 m, 7–15.xi.1909, Lorentz [2♂ 2♀, ZMAN]; Sulawesi (= Celebes Island), 30 km NW Rantepao, Bulu –Bulu, 9–15.v.1966, Malaise trap, R . Straatman [1♀, BPBM] .

Figures

Figures 39–50. 39–40, Citrogramma solomonense: 39, dorsal view of male abdomen; 40, dorsal view of female abdomen. 41, Citrogramma hervebazini, dorsal view of female abdomen. 42–44, Citrogramma quadricornutum: 42, dorsal view of male abdomen; 43, dorsal view of female abdomen; 44, dorsal view of male scutum and scutellum. 45, Citrogramma fumipenne, dorsal view of male abdomen. 46–49. Citrogramma luteifrons: 46, dorsal view of female head; 47, dorsal view of male abdomen; 48, lateral view of male pleuron and head; 49, dorsal view of female abdomen. 50, Citrogramma schlingeri, dorsal view of male head.

Figures 76–87. 76–77, Citrogramma clarum: 76, dorsal view of male abdomen; 77, dorsal view of female abdomen. 78, Citrogramma shirakii, dorsal view of male abdomen. 79, Citrogramma frederici, dorsal view of male abdomen. 80–84, Citrogramma chola: 80, lateral view of male head and pleuron; 81, dorsal view of male head; 82, dorsal view of female head; 83, dorsal view of male abdomen; 84, dorsal view of female abdomen. 85-87, Citrogramma citrinum: 85, dorsal view of male abdomen; 86, dorsal view of female head; 87, dorsal view of male head.