OCR Text |
Show 230 Mit. p. C A M E R O N O N [Mar. 19, Mandibles black, brownish at the base : the apical tooth is triangular, blunt, and is clearly separated; there is a short triangular incision between it aud the slightly oblique inner part. The eyes slightly converge above. The transverse striation on the mesonotum is coarse ; the scutellum is transversely striated, the base not quite so strongly as the rest. The base of the median segment is obliquely depressed ; its centre is broadly furrowed ; the lower half of the metapleura is strongly punctured. Legs : the tarsi are closely spinose; the anterior are more than twice the length of the tibiae, which are narrowed at the base ; the hinder are bent distinctly there and dilated before the apex. The cloud in the wings extends from the costa to the middle of the transverse cubital nervure ; it originates at the end of the stigma; the areolet is oblique, its pedicle is not quite so long as the basal fork of the nervure. EHYSSA TRIDENTATA, sp. nov. Nigra, late fiavo-maculata ; segmento mediali fiavo ; alis hyalinis, macula substigmatali nigro-ccerulea; pedibus rufis, tarsis fuscis. 2 • Long. 18 ; terebra 23 mm. Antennae black ; the scape and base of the flagellum rufous; there is a narrow white ring shortly beyond the middle of the flagellum. The face, the inner orbits to the lower ocellus, the outer orbits entirely, and the clypeus are pale yellow ; the face below the antennae is punctured and has a shallow longitudinal furrow there ; over the clypeus is a distinct furrow ending on either side in a fovea ; the apex of the clypeus is transverse and ends in three short blunt teeth. Mandibles black ; the two apical teeth short, subequal. Occiput yellowish, suffused with rufous. Prothorax yellow, rufous on the lower side. Mesonotum black ; the sides next the tegulae rufous, in the centre are two yellow lines. Scutellum and scutellar keels yellow; the apex of the scutellum rufous and finely transversely striated ; the scutellum distinctly punctured. Postscutellum smooth, yellow. The base of the median segment black, of its pleuiae dark rufous ; the mesopleurae yellowish below the fore wings, rufous yellow below the hinder wings and at the apex below. Metapleurae closely punctured, most strongly on the lower half. Legs rufous ; the anterior pallid yellowish in front, especially the tibiae ; all the tarsi are darker towards the apex, they are minutely spinose and are longer than usual, the basal joint of the anterior is as long as the tibiae. Wings hyaline, except for the cloud, which extends from the costa to the end of the recurrent nervure, it becoming narrower as it does so, but not extending beyond its outer side; the stigma is fulvous ; the costa and nervures black; the cloud has a distinct bluish tinge ; the areolet is distinctly appendiculated and oblique; the pedicle is two-thirds of the length of the branches; the areolet is oblique, narrowed above, somewhat triangular in shape, and receives the recurrent nervure at the apex. |