Quichuana cestus, HULL, 1946: 4

Ricarte, Antonio, Marcos-García, M. Ángeles, Hancock, E. G. & Rotheray, Graham E., 2012, Revision of the New World genus Quichuana Knab, 1913 (Diptera: Syrphidae), including descriptions of 24 new species, Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 166 (1), pp. 72-131 : 87

QUICHUANA CESTUS HULL, 1946: 4

Diagnostic features

Female

Antenna black; basoflagellomere oval ( Hull, 1946: 16, fig. 16); bf = 1.5; black face, with white hairs; face with a central shiny stripe from the mouth edge to the bottom of the frontal prominence, and with two lateral stripes outlined with white pollinosity and almost reaching the antennae ( Hull, 1946: 15, figs 4, 16, fig. 14); scutum and pleuron extensively covered with light golden yellow hairs, conspicuously tufted on the PAPT posterodorsally; scutellum with light golden yellow hairs only; legs black, except for the reddish markings on the basal third of the metatibia and the metatarsus dorsally; wings extensively microtrichose, except for some bare anterobasal areas of the cell CuP and anal lobe; tergum I with a moustache arrangement of light golden yellow hairs; terga II–IV with a semicircular band of black posteriorly directed hairs on the posterior margin; on tergum II the band is composed by a few black hairs; on tergum III the band extends on half of the tergum length; and on tergum IV on two-thirds of the tergum length.

Male

Unknown.

Material examined

Holotype: 1f, Holotype cestus Hull (handwritten on a red label)/ Mt. Duida , Venezuela, 1.xi.1929 (date handwritten)/Ac. 29500, Tate. no. 549 ( AMNH) .

Range

Venezuela.

Taxonomic notes

Medium size species (11.2 mm) with moderately broad abdomen; similar to Q. personata sp. nov., but with higher density of body hairs, which are extensively golden yellow in Q. cestus but whitish in Q. personata sp. nov.; in Q. cestus bf is 1.5, the pro- and mesotibia have brown markings, and the scutellum is wholly pale haired, whereas in Q. personata sp. nov. bf is 2 ( Fig. 54 ), the pro- and mesotibia are black, and the scutellum has a few black hairs.

Although these two similar species are found in Venezuela, the type localities are very different. Duida ( Q. cestus ) is a mountain in the southern state of Amazonas, with the highest altitude at 2880 m a.s.l. , very rainy, and with unique vegetation. San Antonio de los Altos ( Q. personata sp. nov.), about 800 km to the north of Duida , is close to the sea and sits at 1400 m a.s.l.

QUICHUANA CINCTA ( BIGOT, 1883) LEPIDOMYIA CINCTA BIGOT, 1883: 345

Figures

Figures 51–55. Quichuana right antennae, lateral inner view: 51, Quichuana seiferti sp. nov., male paratype; 52, Quichuana zoricae sp. nov., female paratype; 53, Quichuana melas, male holotype; 54, Quichuana personata sp. nov., female holotype; 55, Quichuana pogonosa sp. nov., male from type locality. Scale bars: 1 mm (lower bar applies to Fig. 55 only).