Evaza nigrispinis de Meijere, 1924

Rozkošný, Rudolf & Vaňhara, Jaromír, 2017, A revision of the species of Evaza Walker described by J. C. H. de Meijere (Diptera, Stratiomyidae, Pachygastrinae), Zootaxa 4231 (2), pp. 219-237 : 235-237

Evaza nigrispinis de Meijere, 1924

( Figs 26–27 )

Evaza nigrispinis de Meijere, 1924: 10

Diagnosis. Predominantly dark species, scutellum black, scutellar spines usually yellowish apically. Wings almost hyaline, only stigma yellowish. Legs extensively darkened and abdomen rounded, barely longer than broad.

Redescription. Male. Unknown.

Female ( Figs 26–27 ). Body length 6.6–7.8 mm, wing length 5.8–7.6 mm. Head about as long as high in profile and 1.4 broader than high in frontal view. Eyes separated by a relatively narrow shining black frons, at narrowest point 1.5 times broader than anterior ocellus. Whitish hair spot above antennae almost semicircular, medially divided by a black line, separated from eye margin but continuing as narrow whitish haired lines along each inner eye-margin. Antennae reddish yellow, their basal segments somewhat darkened. Pedicel with conspicuous fingerlike projection above inner basal part of flagellum. Almost bare subapical arista as long as scape and flagellum combined. Face whitish haired. Gena narrow, postgena with longer whitish hairs, postocular area well distinct, about as broad as fore basitarsus is broad. Palpus reaching length of labellum, its distal segment somewhat dilated, elongate oval and reddish yellow, basal segment darkened.

Thorax shining black, postpronotal calli reddisch brown, pale line along upper margin of anepisternum very narrow or not distinct. Scutellum black including posterior margin but spines more or less yellowish apically. Scutal pubescence short, yellowish. Pleura mainly shining black with short yellow hairs. Wing almost hyaline, stigma yellowish. Halter dark brown with yellow stem. Legs predominantly black, apical thirds of all femora reddish yellow and basitarsi with dense reddish pile on ventral side.

Abdomen almost round, about as long as broad, uniformly dark and partly shining. Pubescence mainly dark, somewhat paler ventrally.

Type material. Two syntypic females from Indonesia in ZMAN ( Woodley 2001, in RNH now), the first of them labelled “Edw. Jacobson/ Gun. Teleman/ Sum. 5 1917, Evaza nigrispinis det. de Meijere, Type, Evaza nigrispinis de Meijere, 1924 , ZMAN type DIPT 0 27.1. “The second female syntype with the same locality label but “Sum. 6 1917“ and “ ZMAN type DIPT 027.2“.

Other material examined: Malaysia: 1 ♀ Sandakan Bay, Sapagay Lumber Camp, 2–20 m, 12.xi.1957, J.L. Gressitt ; 1♀ N Borneo, Forest Camp, 19 km N of Kalabakan, 60 m, 30.x.1962, K.J. Kuncheria, both BPBM. Remarks. Both females from Borneo are somewhat paler then the two syntypes, their fore femora are almost completely reddish yellow, darkening of mid and hind femora being less conspicuous and also the bases of hind tibiae are reddish yellow. The female from Forest West Camp has the reddish yellow postpronotal calli as well as the pronotal ridges and a transverse upper part of the pronotum.

Distribution. Evaza nigrispinis was described from Sumatra in Indonesia and here it is recorded from Sarawak in Malaysia for the first time.

Figures

FIGURES 26 – 27. Evaza nigrispinis: female in dorsal (26) and lateral view (27).