Chaetocnemistoptera formosa Borgmeier 1961

Chaetocnemistoptera formosa (Borgmeier, 1961)

(Figs 1, 13, 19, 21, 23, 31, 43–46)

Chaetopleurophora formosa Borgmeier, 1961: 6; 1968: 13; 1969: 36. Chaetocnemistoptera formosa; Brown, 1992a: 52.

Diagnosis. Scutum, scutellum and pleural regions yellowish-brown; hind tibia with 3–5 posterodorsal setae; left epandrial process trilobed at apex.

Material examined. Holotype ♀, PUERTO RICO: San José: Airport, III.1945, Borgmeier col. (MZSP). Additional material: 1♂, PUERTO RICO: El Verde: Barrio Rio Grande, G.E. Drewery, (MZSP); 3♂, US VIRGIN ISLANDS: St. Thomas Estate Botany Bay, 18.35ºN 64.92ºW, vii– 15.ix.1994, M. Ivie et al. col. (LACM); 1♂, BRITISH VIRGIN ISLANDS: Guana Island: Long Man’s Point, 18.49ºN 64.58ºW, 20–25.iv.1993, Malaise trap, R. Snelling col. (LACM).

Hypopygium description (Figs. 43–46). Left epandrial process large, with three apical setose lobes. Hypandrium bilobed, with triangular protuberances at apex. Hypoproct with four setae.

Geographical distribution. Puerto Rico and close islands (Fig. 72).

Comments. Males can be associated with the female holotype of C. formosa (as in Borgmeier, 1969) by the presence of the ventral interfrontal setae shifted near to the eye margin, R2+3 complete, 3–5 hind tibia posterodorsal setae and foretibia dorsal seta at basal third.

The close relationship of C. formosa, C. palpalis and C. nigroscutellata is suggested by the probably apomorphic characteristics: ventral interfrontal setae near the eye margin, oval patch of differentiated setulae in the fore and mid femur, hind femur with ventral row of strong setulae and R2+3 complete.