OCR Text |
Show 56 PEOF. P. B. U H L E B - E N U M E E A T I O N O F T H E [Jan. 15, much smaller than the females. The fully-coloured and well-matured specimens are greenish, with the silvery pubescence and white bloom coating the surface thickly. Immature and freshly-excluded specimens have the costal margin and veins of the wing-covers rufous or yellowish and most of the body testaceous. The broad black stripe current from the head to base of pronotum is absent, or nearly so, in the pale varieties, as are also black, bands from the femora and tibise. There is scarcely a substantial character now remaining to separate this species from P. albida, Oliv.; and now, as our collections are growing large, tbe species of this genus are becoming more comprehensive and less distinctly separable. This small form inhabits also Jamaica, Cuba, San Domingo, and St. Thomas. The next size larger is found in Mexico and Central America. PEOABNA SQIIAMIGEEA, sp. nov. Luteous or pale green, more or less clothed with scale-like, prostrate, silky pubescence, which readily rubs off. Head short, blunt, the vertex deeply grooved on the middle line, closely hairy, marked with a black band on the area of the ocelli, and sometimes with a black tubercle each side ; the front almost flat on top and hairy, smooth, and yellow in the middle of this part, from each side of which a curved black stripe converges towards the middle and continues down to near the clypeus; the transverse grooves almost straight, but not quite symmetrical; cheek between the eye and front dark brown and coarsely wrinkled ; clypeus smooth, pale, usually marked with a brown spot; the rostrum pale, tipped with piceous, reaching between the posterior femora; first and second joints of antenna? piceous black, excepting the ends, the following joints growing paler towards the tip. Pronotum narrowing anteriorly, curving well over the base of the head, having the sutures mostly black, and with an oblique black streak each side of the middle of the dorsal w?edge, and sometimes with a double streak each side behind it; the lateral margin widely reflexed, and carried as a wide lobe much below the line of the eyes, the humeral angle broadly lobate and turned up ; mesonotum smooth, very moderately convex, usually marked at base with four obconical black stripes, of which the two inner ones are most distinct and shorter; the space in front o£ the mesonotal cross wide, deep, and often infuscated, the cross quite prominent, short, and less deeply sinuated behind. Legs greenish, yellow when faded, usually with a black spot near the base and tip of the femora, and with the knees and end of tibia?, more or less of the tarsi, and the tip of the nails blackish piceous. Win»-covers vitreous, tinged with green in the matured insect; the veins greenish, interrupted with dark brown on the apical series, the anastomosis at tip of costa marked with a black fork; base of the first forked vein back of this has a dark spot, and the next vein inward from this has also a dark spot; veins of the base of the |