Chlorotabanus ochreus Philip & Fairchild, 1956

Krolow, Tiago Kütter & Henriques, Augusto Loureiro, 2010, Taxonomic revision of the New World genus Chlorotabanus Lutz, 1913 (Diptera: Tabanidae), Zootaxa 2656, pp. 1-40 : 31-33

Chlorotabanus ochreus Philip & Fairchild, 1956

( Figure 11 A–E)

Chlorotabanus (Chlorotabanus) ochreus Philip & Fairchild, 1956: 317 –318, fig. 4.

Chlorotabanus ochreus, Fairchild, 1969: 208 (classification); Fairchild, 1971: 55 (catalog); Fairchild & Burger, 1994: 87 (catalog); Krolow & Henriques, 2008: 269 (citation); Coscarón & Papavero, 2009b: 68 (catalog); Krolow & Henriques, 2009: 209 (citation).

Type locality: Brazil (SP, Bocaina)

Original transcript ( Philip & Fairchild, 1956). Holotype Ψ: Body length: 15.5 mm ( Fig. 11 A–B), wing length: 14.0 mm.

Diagnosis: A large, robust fly with a pale-yellowish body without distinctive markings, and wide, parallel-sided frons without basal callosity.

Head ( Fig. 11 C): Head wider than thorax, eyes red, glabrous. Frons buff pollinose, rather wide and parallel-sided, index 1: 4.0; no basal callosity, a small irregular mid yellow spot. Subcallus, face and cheeks also buff pollinose. Vestiture of gena, palpus and basal antennal segments pale yellow. Antennae ( Fig. 11 D) as shown, yellow, with plates distinctly longer than broad, but only slightly longer than the annuli. Palpus pale yellow, rather elongate but not attenuated. Labella rather small, shining red-sclerotized.

Thorax and abdomen: Thorax pale buff, the abdomen straw yellow. Legs and halters yellow. Entire vestiture concolorous, a few darker reddish hairs distally on the fore and hind tibiae. Wings ( Fig. 11 E) slightly darker in the costal cells; veins entirely yellow, no darkened sections, no spur veins on R4. Subepualets bare. Halters pale yellow.

Discussion: Larger than C. parviceps or C. inanis , and resembles a pale Cryptotylus chloroticus aeratus . The wide, completely pollinose, parallel-sided frons, and distinctive antennae readily separate this from related species.

Type locality: “Bocaina, [ Brazil], II-1912, crepuscular, blood Green, Ad. Lutz No. 48.” In MCZ from Ad. Lutz as T. inanis ”.

Distribution: Brazil (São Paulo).

Holotype Ψ: deposited at MCZ (not examined). Photos acquired from MCZ Types Database (http://mcz- 28168.oeb.harvard.edu/mcztypedb.htm).

Additional material examined: [ BRAZIL]. SP [São Paulo], Salesópolis (Est. Biol. Boracéia, 850m, isca humana, arm. Shannon, 19–20 horas), without date (J. Oliveira Santos), Chlorotabanus ochreus P[hilip] & F[airchild] det. Fairchild, 1966 ( MZSP).

Comments: The original description of the holotype was read but the holotype was only seen in photographs and so not all characters were analyzed. In all the material received for this revision, only one was identified as C. ochreus , from MZSP (determined by Fairchild 1966). This specimen was somewhat different than the holotype: F.I. 4.2; lack of reddish hairs distally on the fore and hind tibiae; greenish scutellum; shiny-green labella; greenish legs, except for the yellowish tarsomeres; and other, less accentuated, differences in color. Yet, with larger size (16.2 mm) and antenna with slightly more elongate basal plate, the specimen is very similar to some C. parviceps , including morphological measurements (F.I. 4.2, D.I. 1.0, B.P.I. 1.4, Flg.I. 1.3). Additionally, this specimen was collected in Salesópolis, where C. parviceps has been collected many times. In insects, doubt always arises from the use of size as a principal character to separate species, since size may be due to resources during development. Thus, C. ochreus is maintained as valid species, but future collections in the region and a thorough examination of the holotype may corroborate the validity of this species or indicate its synonymy with C. parviceps .

Figures

FIGURE 11. Chlorotabanus ochreus (A – E Holotype Ψ): A – B, Body (dorsal and lateral views); C, Head (frontal view); D, Antenna (lateral view); E, Wing (dorsal view). Photos acquired from MCZ Types Database.