76 R. Wi CROSSE. 
reddish brown and contrasting with green or blackish mesonotum (some specimens 
with golden green abdomen rather similar to mesonotum but then pale ground 
showing through the green colour). . 14 
14 Unusually small species, length 1o-11-5 mm. Bristling of eater of Steraoplemen 
mid and hind coxae and prescutellar region not noticeably spiniform. Femora 
entirely reddish yellow. [Samoa] . : R. savaiiensis 
— Larger species, length 12-5-16 mm. Bristling of verter of Srecouplcnes mid and 
hind coxae, prescutellar region and scutellum very strong, stiff, rather straight 
and sub-spiniform. Femora either reddish yellow or partly or mostly darkened 
to reddish brown or dark brown. [Fijiand New Hebrides] . - R. transfuga 
Rutilia (Donovanius) brunneipennis sp. n. 
9. Head. Ground colour brownish black on most of head, genal regions dark reddish brown, 
epistome black. Head pollinosity very thin and whitish, bases of parafrontal hairs appearing 
as slightly darkened minute dots. Parafrontal and parafacial hair black, genal hair blackish 
brown, occipital hair yellowish white. Vertex 0:25 of head-width. Frontal setae very fine, 
meeting or crossing at tips. Proclinate orbital setae absent. Gena very wide, 0-50 of eye- 
height. Parafacial about three times as wide as third antennal segment, with short sparse 
black hairs on most of its height. Antennae black and slightly elongate (facial carina corres- 
pondingly slightly longer than usual), third segment about 2:5 times as long as the rather long 
second segment; antennae falling short of epistomal margin by about 1-3 times their length. 
Palpi brownish with tawny apices. Thorax. Dark purplish brown with no evident metallic 
colour to naked eye (mesonotum with slight coppery purple glints under microscope) ; mesonotum 
without obvious pollinosity and without definite dark vittae (thin trace of whitish pollinosity 
present on prescutum and visible under microscope when seen from behind). All thoracic 
hair black. Scutellum with eight pairs of marginal setae (apicals included), the apical pair 
very much smaller than other marginals; scutellar marginals (and also the prescutellar setae) 
rather stiff and straight. o-+ 1 stpl setae. Wings. Basicosta black. Wing membrane 
distinctly infuscate, especially anterobasally, suffused with dark brown along the veins and 
especially on v—m cross-vein. First basal cell completely microtrichiate, as the rest of the 
wing. Calyptrae blackish brown with brown fringe hair. Legs. Black with entirely black 
hair. Hind tibia with well formed even close-set ad fringe. Abdomen. Dark purplish brown 
with entirely black hair, concolorous with thorax. T3 without median marginal setae. Hair 
of T3 recumbent, of T4 semi-erect, and of T5 erect. Measurements. Large species, body 
length about 20 mm, wing length about 19 mm. 
6. Unknown. 
MATERIAL EXAMINED 
Holotype 2, SoLomon IsLanps: Guadalcanal, Suta, 27.vi.1956 (E. S. Brown). 
In British Museum (Natural History), London. 
DISTRIBUTION. Known only from the holotype from Guadalcanal in southern 
Solomon Islands. 
AFFINITIES. R. brunneipennis sp.n. unquestionably belongs in the subgenus 
Donovanius, although it should be noted that the holotype is aberrant in one respect: 
the postalar callus of the left side has the normal 4 strong setae, whereas that of the 
right side has only three postalar setae. It is the only species of the subgenus yet 
known from the Solomon Islands. The heavy infuscation of the wings (to which the 
specific name alludes) makes the species appear quite distinctive, though in the 
general very dark and uniform colouring it is rather similar to R. (D.) inusta, to 
which it is perhaps closely allied. The g is unknown, but as the ¢ genitalia in 
