Euxesta wettsteini Hendel, 1909

Korneyev, Severyn V., Hauser, Martin, Kameneva, Elena P. & Gaimari, Stephen D., 2022, A key to species of the Euxesta sororcula species group (Diptera: Ulidiidae: Lipsanini), with new synonymy and a new record from the U. S. A., The Pan-Pacific Entomologist 98 (2), pp. 150-162 : 159

Euxesta wettsteini Hendel, 1909

Fig. 1c

Euxesta wettsteini Hendel, 1909:154 (key), 165 (description), 1910:28 (catalog); Curran, 1935:12 (key); Steyskal, 1968:54. 20 (catalog); Kameneva, 2004:619 (material).

Type Specimens. Syntypes 3 ♀, BRAZIL: São Paulo, labeled: “Iguape/Young”; “Bras. Exped. / Wettstein. [18]91”; “wettsteini H. / det. F. Hendel \ Euxesta ”; “Type” [thick red paper]; “Syntype Euxesta wettsteini Hendel 1909 des. Korneyev & Kameneva 2001” (NHMW). Syntype 1 ♂, same labels as above (HMNH), not examined.

Additional Specimens Examined. 1 ♀, COSTA RICA: Prov. Guanacaste: A. C. T., Est. Lomas Barbudal, 30 m, VII.1991, Acevedo (INBC); 1 ♀, 2 km E Hacienda Palo Verde, VII.1973, Keeler (USNM); 1 ♀, Prov. Puntarenas: Coto [Brus], finca 47, 25.VII.1957, Menke (LACM).

Remarks. As noted above, E. wettsteini differs from E. abdominalis only by the syntergite 1+2 entirely black (instead of dirty yellow in E. abdominalis ). Three of the four females in a series from Costa Rica have entirely black abdomens as in E. wettsteini , and one female has yellowish base of abdomen as in the three males; all the specimens here identified as E. wettsteinii are also females that possibly shows their differences to be only a result of sexual dimorphism or individual variability (including geographical). We do not formally synonymize these two names, as additional studies of larger series including the genital characters are needed.

Distribution. Brazil, Paraguay, Trinidad, U.S.A. (Hawaii) ( Steyskal 1969), Venezuela ( Steyskal 1968).

Figures

Figure 1. Wings: (a) Euxesta latifasciata; (b) E. leucomelas (=E. fascipennis); (c) E. wettsteini; (d) E. abdominalis, syntype, MCZ; (e) E. sororcula, type, NHMD; (f) E. obliquestriata, syntype, NHMW. (a–b modified from Wulp (1899); and d modified from EOL site https://eol. org/pages/734579/media). Abbreviations: SA = subapical band; A = apical band; phi – preapical hyaline interspace. Fine black lines show the ratio of SA and phi along vein R4+5 and light blue arrows indicate other characters mentioned in the key.