Go to National Library of New Zealand Te Puna Mātauranga o Aotearoa
Volume 49, 1916
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B. lacuans n sp.

♂ (?). Eyes minutely hairy and dichoptic; front shiny bluish-black, with a few delicate hairs and a patch of silvery tomentum just above the antennae; this tomentum is darker in certain lights and notched along posterior margin; antennae situated about the middle line of head or perhaps a little below, not elongate, not as long as width of an eye, blackish-brown, the base of the flagellum dark testaceous; 1st and 2nd joints short, of about equal length, and bristly; flagellum with a dense pubescence, 7-segmented, the 1st broad, the ultimate about twice as long as the penultimate and terminating in a tuft of hairs. Face black, thinly hairy and with a delicate greyish tomentum; proboscis pale yellow; palpi tawny pubescent, and 2-jointed, projecting beyond the proboscis; 1st joint hairy, lighter in colour than the 2nd, which is fusiform and terminates in a pair of

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black stiff hairs. The arrangement of the vestiture of both palpal joints gives an indistinct segmented appearance; in the 2nd joint there appears to be 7 such segments, the 1st distinct and forming a neck. Occiput depressed and indistinctly hairy; posterior orbits much narrowed above but slightly widened below, with long hairs at lower end and beneath the eyes; posterior orbital hairs present, short and bristle-like—a character of all the species described in this genus.

Dorsum brilliant bluish-green, the humeri and post-alar calli tawny; pleurae shiny blackish-brown with a tuft of greyish hairs below the humeri; scutellum brilliant bluish-green margined with tawny, the 4 spines large and tawny.

Anterior and middle legs tawny with darker markings on femora and tibiae, metatarsi and onychotarsi fuscous, protarsi about half as long as the whole joint. The posterior legs, halteres, and abdomen lost.

Wings clear but for the dark-brown stigma and a broad transverse median brown cloud; veins dark brown; auxiliary vein not sinuated (fig. 28); 1st section of 3rd vein, if anything, a little longer than the anterior cross-vein; anterior branch of 3rd vein arising at right angles and slightly curved forward to the costa, the posterior branch almost straight; anterior cross-vein nearly perpendicular. Apex of discal cell posterior to line of end of 2nd longitudinal, which runs almost straight from the 1st vein before turning up to the costa; vein between the basal cells obsolete and represented by a clear line and furrow; an oblique vein closing the basal cells behind.

Length of wing, 5 mm.

This type, though incomplete, is quite distinct from the other species.

Habitat.—Wallacetown, January (Philpott).