178 PROF'. M. BEZZI. 



unspotted ; cheeks and jowls yellow, the latter with a not much developed reddish 



spot below the eyes. Antennae with the first joint shorter than the second ; they 



are of a dark reddish colour, with the third joint blackened towards the tip ; arista 



reddish on the basal part. Palpi and proboscis yellowish. All the cephalic bristles 



are black, only the genal bristle being dark brownish. Thorax of an opaque dark 



reddish colour on the disc, with a broad, rather shining, black paten on each side 



before the suture and above the notopleural line ; along the middle line there is a 



narrow blackish stripe, broadening beneath the suture to form a broad patch before 



the scutellum ; the dorsocentral lines are marked with a narrow, less distinct, more 



reddish stripe. The humeral calli are entirely shining yellow, with a narrow, reddish 



border above. The pleurae are shining reddish, with striking yellow markings, as 



follows : a broad, triangular, mesopleural patch, narrowly united in front with the 



humeral calli, and continued on the pteropleura and below with a small spot on 



the upper border of the sternopleura ; this last spot, as well as the lower end of 



the mesopleural band is broadly margined with black. There is a single, 



rounded, hypopleural spot, which is very striking on account of the mesophragma 



being entirely black. Scutellum entirely yellow, with a narrow, reddish-brown, 



basal stripe, and with two bristles at the end. All the bristles are black ; the 



anterior supra-alar is well developed, like the pteropleural one ; the middle scapulars 



are not distinct, while the lateral ones are well developed ; the very short pubescence 



of the back is more greyish, that of the pleurae longer and whitish, chiefly on the 



lower part of the sternopleura and on the breast. Halteres whitish yellow. Abdomen 



ovate, narrowed at base, convex, coloured and punctate like the disc of 



mesonotum ; the segments .ire partly fused together along the middle line ; the 



posterior border of the second segment is paler ; along the middle line there is a 



narrow black stripe, and on the sides of the 3rd to 5th segments there is a broad 



black patch ; but the entire lateral border is narrowly reddish., and the hind 



border of the last segment is more broadly reddish. The short pubescence is 



greyish on the disc, and longer and more whitish on the sides. Venter entirely 



reddish-yellow. Ovipositor very long, measuring 2 '5 mm. in length, about as 



long as the abdomen ; it is strong, cylindro-conical, shining reddish, with rather 



long, whitish pubescence. Legs rather slender, entire y pale yellow ;_h and quite 



unspotted, only the four posterior coxae and the tarsi ^eing a little more reddish ; 



pubescence and hairs whitish ; apical spur of middle tibiae black ; claws black, 



with reddish base. Wings (fig. 1) long and broad, greyish hyaline, strongly iridescent, 



with reddish brown veins, which are blackened towards the end. The first four 



segments of the costa are of about the same length ; the second longitudinal vein 



is short, the fifth segment of costa being thus longer than the preceding one ; the 



third vein is less bent downwards at the end and is parallel with the last portion of 



the fourth, which is almost straight ; lower end of the small cross- vein placed a little 



beyond the middle of the discoidal cell ; the lower prolongation of the anal cell is 



proportionally broad and short, being only a little longer than the rest of the 



anal vein. The pattern is very reduced, consisting only of the yellowish stigma and 



a fuscous spot almost s ymm etrically placed across the end of the third longitudinal 



vein, but more developed below ; the second costal cell is also slightly shaded 



at the base in front of the humeral cross-vein ; the base of the first basal cell is 



