Diadasina riparia (Ducke)

Diadasina riparia (Ducke) View in CoL

( Figs. 2 View Figures 1–6 , 9 View Figures 7–10 , 12 View Figures 11–12 , 14, 17 View Figures 13–17 , 24 View Figures 23-24 )

Ptilothrix riparia Ducke, 1907: 82 View in CoL . Lectotype male, Brazil, Maranhão, Codó 17.vi.1907, Museu Paraense Emilio Goeldi, examined. Designated by Nascimento, 1979: 9.

Ancyloscelis riparia : Ducke, 1908: 33 (amendment of original description).

Diadasia parahybensis Cockerell, 1912: 58 View in CoL . Holotype male, Brazil, Paraíba, Independencia [nowadays Guarabira], Mann & Heath, AMNH, examined. New Synonym.

DIAGNOSIS: Both sexes of this species are characterized by the short and dense pile that covers the scutum and the metasomal terga, and by the scarcely elevated vertex. The females are further characterized by the bright ferruginous prepygidial and pygidial fimbriae. The males are distinguished by the simple flagellum, not crenulate, reddish on the underside, and with long flagellomeres.

REDESCRIPTION: Female. Length, 7.0–9.0 mm; length of forewing 6.3–7.2 mm. Black, except yellowish brown tarsi, yellowish tibial spurs, and reddish underside of flagellum; tegula varies from yellowish to dark brown in some specimens. Pubescence greyish on head, mesosoma, proximal part of legs, and base of T1, in some specimens yellowish brown on vertex and dorsum of thorax, yellowish brown to bright orange brown on tibiae, tarsi, metasomal sterna, prepygidial fimbria, and pygidial fimbria, yellowish on basal part of T2–T5; apical bands on T1–T4, yellow. Hairs on scutum dense and short, 0.7–1.1 ˟ MOD; on mesopleuron 1.3–1.8 ˟ MOD. Hairs on outer side of forebasitarsus bearing numerous short branches; hairs on outer side of hind tibia and basitarsus plumose. Apical band of T1 laterally formed by long appressed hairs, but medially formed by erect, short and dense hairs; band on T2 with a similar pattern, but lateral hairs shorter; band on T3–T4 with short and appressed hairs, as most of basal part of these terga, so the basal limit of the band is not apparent in certain views of the metasoma; band on T3 along midline 1.2–1.7 ˟ MOD. Scutum with dense punctures, on disc separated at most by 0.5 ˟ puncture diameter. Eyes convergent below, proportion of upper to lower interocular distance, 1:1.08–1.15. Vertex moderately elevated behind ocelli, distance from median ocellus to vertex in frontal view 0.7–0.8 ˟ MOD. Last segment of labial and maxillary palpi with rounded apex.

Male. Length, 5.5–7.8 mm; length of forewing 5.0– 6.5 mm. Color and vestiture similar to that of female; hairs on scutum 0.8–1.1 ˟ MOD. Apical bands present on T1– T6, that on T3 along midline 1.2–1.4 ˟ MOD. S6 with dense tuft of hairs on median longitudinal elevation, and bare at sides of it. Vertex of head moderately elevated behind ocelli, distance from median ocellus to vertex in frontal view as long as 0.9 ˟ MOD. Flagellum not crenulate, proportion of four proximal flagellomeres 1:1.35:1.35:1.35; first flagellomere as long as its apical width, following three flagellomeres longer than their apical width (1.15 ˟).

COMMENTS ON TYPE MATERIAL: Nascimento (1979) failed to indicate the sex of any of the lectotypes designated by him. In the case of Ptilothrix riparia Ducke , the lectotype is a male. The original description of P. riparia was amended by Ducke one year later ( Ducke, 1908). He indicated that the prepygidial fimbria of the female was ferruginous and the scopa on the hind tibia and basitarsus of moderate length.

The holotype of Diadasia parahybensis Cockerell agrees in all features with the lectotype of D. riparia . The metasoma of the holotype is glued to the locality label.

DISTRIBUTION: Argentina, provinces of Catamarca, Jujuy, Salta , and Santiago del Estero. Bolivia, department of Santa Cruz . Brazil, states of Bahia, Espírito Santo, Minas Gerais, Pará, Paraíba, Rio Grande do Norte , and Tocantins. Paraguay, departments of Boquerón and Presidente Hayes .

MATERIAL STUDIED: Argentina. Catamarca: 1 F, i.1929, Bocchio ( MACN) . Jujuy: 1 F, Jujuy ( MACN) . Salta: 8 F, 2 M, Sumalao , i.1993, M. Fritz ( MACN) ; 2 F, 2 M, Coronel Moldes , i.1989, i.1993, M. Fritz ( MACN) ; 1 F, Coronel Moldes , 27.i.1994, F. Trucco Alemán ( MACN) ; 1 F, 3 M, Coronel Moldes , i.1945, F. Monrós ( MLP) ; 1 M, Coronel Moldes , i.1945, F. Monrós ( IFML) ; 1 F, Cachi , 21.viii.1968, Golbach, Terán, Willink ( IFML) ; 1 M, Quijarro , 25.xi.1951 ( MLP) ; 3 F, 10 M, Tablillas , 15.ii.1945, A. Martínez ( MLP) . Santiago del Estero: 1 M, Puerta del Jardín , 20.xi.1951 ( MLP) . Bolivia. Santa Cruz: 3 M, Santiago , xi.1959 ( SEMC) . Brazil. Bahia: 1 F, Buritirama, Barra , iv.1959, E. Dente ( MZSP) ; 1 F, Mucuge , 3 km S Igeraes, 7.xii.1990, S. Amarante ( MZSP) ; 1 M, Maracás , 19.xi.1965, F.M. Oliveira ( DZUP) ; 1 M, Maracás , 18.viii.1964, C. Elias ( DZUP) ; 3 F, 5 M, Brumado , 6.v.1975, C. Elias ( DZUP) ; 1 F, Jeremoabo , 30.i.2010, F.F. de Oliveira ( MACN) ; 1 F, 2 M, Guanambi , 20/ 23.ii.2010, F.F. Oliveira ( MACN) . Espírito Santo: 1 F, 1 M, Santo Antônio , 22.iv.1966, C. Elias ( DZUP) ; 1 F, 1 M, Santa Leopoldina, Jetibá , 11.iii.1966, C. Elias ( DZUP) ; 1 F, Dom. Martins , 16/ 28.ii.1966, C. Elias ( DZUP) ; 1 M, São Domingos , 27.iii.1966, C. Elias ( DZUP) ; 1 M, Itaguassu , 25.iv.1970, C. & C.T. Elias ( DZUP) ; 3 F, 3 M, Santa Teresa , 4.iv.1966, C.T. & C.Elias ( DZUP) ; 3 F, S.J. Petrópolis, 12.ii.1964, C. Elias ( DZUP) ; 1 F, Baixo Guandú , 25.iv.1970, C.& C.T. Elias ( DZUP) ; 1 F, Fundão , 20.iv.1964, C. Elias ( DZUP) . Minas Gerais: 1 F, 2 M, S.R.Cassia, 11.V.1961, C.Elias ( DZUP) ; 1 F, Passos , x.1963, C.T. Elias ( MZSP) ; 6 F, 5 M, Passos , iii.1961, 15.iii.1962, 20/ 26.iii.1963, C. Elias ( DZUP) ; 2 F, 3 M, Delfinópolis , 6.iv.1963, C.Elias ( DZUP) ; 2 M, Nova Resende , viii.1961, C. Elias ( DZUP) ; 1 F, Pratápolis , 5.ii.1963, C. Elias ( DZUP) ; 1 F, Alpinopolis , iii.1961, C. Elias ( DZUP) . Pará: 3 F, 12 M, Conceição Araguaia , vii.1959, M. Alvarenga ( SEMC) 1 F, 1 M, Conceição Araguaia , vii.1959, M. Alvarenga ( DZUP) . Paraíba: 1 F, 1 M, Santa Luzia , 18.xi.1955, R. Lima ( DZUP) ; 2 M, Juazeirinho , viii.1955, A. Silva ( DZUP) ; 2 M, Brandão dos Chandoca, Serra do Brandão , 8.ix.1955, A. Silva ( SEMC) . Rio Grande do Norte: 1 M, Serra Negra do Norte , 17.vi.1995, F. Zanella ( SEMC) . Tocantins: 1 F, 1 M, Ilha do Bananal, Santa Isabel do Morro , vi.1961, M. Alvarenga ( SEMC) . Paraguay. Boquerón: 1 F, 2 M, Fn. Boquerón, 6.ii.2007, E. Willis ( PCYU) . Presidente Hayes: 2 F, 1 M, 5 km SW Lag. Capitán , 5/ 6.ii.2007, E. Willis ( PCYU) .