Quichuana knabi, SHANNON, 1927

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 : 98

QUICHUANA KNABI SHANNON, 1927 B: 15

Shannon, 1927b briefly described Q. knabi and compared it with Q. calathea . The type, in USNM, is a female labelled as follows: Cavinas, Beni, Bolivia, WmMMann/January/Mulford, Bio Expl., 1921–22/ Type No. 28763 U.S. N.M. (red label)/ Quichuana knabi Snn.

Diagnostic features

Female

Frons with a white pollinose band; basoflagellomere elongate (bf = 2.1), gently tapering towards the apex; face with a central, shiny stripe and two lateral, narrower stripes; occiput with pale hairs, intermixed with black hairs on the upper half; PP with pollinosity; scutum with two nearly parallel, white pollinose stripes extending on the anterior fifth of the scutum; NP, PAPT posterodorsally, and PC with tufts of yellow hairs; scutellum only with short, pale hairs; legs extensively reddish brown, except for metafemora and tibiae, which have some blackish areas; wings extensively microtrichose, brown pigmented anteriorly; abdomen black, tapering towards the apex; tergum I with a moustache arrangement of yellow hairs; terga I–IV wholly pale haired, but tergum V with dark-brown hairs; lateral margins of terga with longer hairs than those dorsally on terga, the longest hairs on tergum II anteriorly; sterna with pale hairs centrally.

Material examined

Holotype (see data above).

Range

Bolivia.

Taxonomic notes

Large species (12.3 mm) with slender abdomen; Q. knabi can be separated from females of similar species such as Q. angustiventris , Q. picadoi , Q. sepiapennis , and Q. sylvicola by the absence of black hairs on terga II–IV; Q. pulverifacies sp. nov. is also similar to Q. knabi , but can be distinguished by the basoflagellomere, which in Q. pulverifacies sp. nov. differs in both shape and bf (1.5), and the face, which is extensively pollinose. Additionally, Q. pulverifacies is a larger species, with body length 14.7 mm.