Cydistomyia (Cydistomyia) tibialis
date: label: Collection Date
content: 10 Jun 1975
name: label: Collector
content: Stephen L. Wood
label: Collector
content: J. L. Petty
notes: label: Notes
content: Holotype female. - Length: 11.2 mm; wing: 9.7 mm. Frontal index 6.0; frons very slightly widened above, light brown tomentose and black pilose; callosity yellow-brown, oval-triangular. not touching eye margins laterally; median extension a narrow black ridge extending two-thirds length of frons; vertex subshining brown lacking ocellar vestiges. Subcallus and upper cheeks brown tomentose; frontoclypeus and lower cheeks gray tomentose and white pilose; beard white pilose, scanty. Antennae reddish brown; scape and pedicel black setose; basal plate of flagellum moderately stout, about 1.8 times longer than broad. with blunt dorsal tooth and no excision; style rather short, 0.7 length of basal plate, slightly darker than plate apically. Palpi rather slender, evenly tapered to acute apex. predominanty black setose. except long white pilose ventrally at base of second segment. Eyes bare, black (relaxed), without pattern. Mesonotum and scutellum gray tomentose, white pilose; antealar tubercles light brown, black pilose. Pleura gray tornentose, white pilose. Coxae gray tomentose, black and white pilose; femora black, black pilose, except yellow at extreme apices of middle and hind pair; fore tibiae cream-colored, white pilose on basal half, remainder black and black pilose; middle and hind tibiae creamy, darkened apically; tarsi black. Wings, including costal cell, distinctly brown infuscated anteriorly to vein R2+3. Hyaline posteriorly except for darker shadows along wing veins; vein R4 angulate but without appendix; basicostas sparsely and irregularly setose. Halteres yellowish. except brown at base of knobs. Abdomen shining brown with single row of median white tomentose and pilose triangles, broadly reaching anterior margins of segments 2-6; segment 7 entirely brown, black pilose; venter blackish with conspicuous while pilose incisures. C. tibialis agrees with the diagnosis of Cydistomyia by Mackerras (1964) in having a slender body, narrow frons, bare unbanded eyes, slender antennae and palpi, wings diffusely darkened anteriorly and R. angulate but without appendix . It is similar to other Sri Lankan Cydistomyia species in having basicostas sparsely and unevenly setose, contrasting with the densely setose basal portion of the costal vein . C. tibialis can be distinguished from other Sri Lankan Cydistomyia species by the large median triangles on the abdomen. Like some other Cydistomyia species, the holotype female was collected at black light, indicating that this source of collecting may yield additional undescribed species when fully exploited throughout the year.
label: Notes
content: [Label H] HOLOTYPE No. 76455 Cydistomyia (Cydistomyia) tibialis Burger; [Label 1] SRI LANKA:Pol.Dist. 20minNW Polonnaruwa 10 June 1975 S.L.Wood & J.L.Petty; [Label 2] Colleced in black light trap
label: Record Last Modified
content: 18 Mar 2020
label: Specimen Count
content: 1
place: label: Place
content: 20 mi. NW Polonnaruwa, Polonnaruwa, Sri Lanka
setName: label: See more items in
content: Entomology Types
publisher: label: Published Name
content: Cydistomyia (Cydistomyia) tibialis Burger, 1982
dataSource: label: Data Source
content: NMNH - Entomology Dept.
identifier: label: Barcode
content: USNMENT00258506
label: Other Numbers
content: Inquire SerNum : 51043
label: Other Numbers
content: SELGEM Serial Number : A8105
label: Other Numbers
content: USNM Type Number : 76455
label: USNM Number
content: USNMENT00258506
objectType: label: Type Citation
content: Entomologica Scandinavica Supplement. 11 : 116, 2A-D.
label: Type Status
content: Holotype
taxonomicName: label: Taxonomy
content: Animalia, Arthropoda, Insecta, Diptera, Brachycera, Tabanidae, Tabaninae
physicalDescription: label: Prep Count
content: 1
label: Preparation
content: Pinned
label: Remarks
content: Holotype
label: Sex
content: Female
label: Stage
content: Adult