Part 24 (2/2)
This very singular genus differs from all the Stridulantes in the size and shape of the prothorax; in the neuration of the elytra it is allied to PLATYPLEURA (Amyst and Serville) in the size of head and hairiness of body it approaches CARINETA of the same authors. The Pupa, (fig. 5.) differs in the form of fore legs from those of the other Cicada.
TETTIGARCTA TOMENTOSA, pl. 4, fig. 4, and 5 its pupa.
Of a brownish ash colour, the hairs on upper part of body short and deep brown, on the sides and under parts long and grey; prothorax varied with black, in front, two large patches covered with grey hairs, mixed with longer; elytra spotted and varied with brown, wings clear, somewhat ferruginous at the base.
Expanse of wings 3 inches 4 lines.
Hab. Australia.
DESCRIPTION OF TWO NEW INVERTEBRATED ANIMALS FROM AUSTRALIA, BY J. E. GRAY, ESQ., F.R.S.
Lamarck separated the mother-of-pearls sh.e.l.l (MARGARITA) from the swallow-tail muscles (AVICULA) on account of its more orbicular shape.
Other Conchologists have been inclined to unite them, as some of the species of AVICULA approach to the shape of the other genus. The new one just received from Australia, which I am now about to describe, in this respect more resembles the Margarita than any before noticed; yet I am inclined to think that the pearl-sh.e.l.ls deserved to be kept separate, as the cardinal teeth are quite obliterated in the adult sh.e.l.ls, which is not the case with any AVICULAE I am acquainted with; and the young pearl-sh.e.l.ls are furnished with a broad serrated distant leafy fringe, while the AVICULAE are only covered with very closely applied short concentric slightly raised minutely denticulated lamina, forming an epidermal coat on the surface.
1. AVICULA LATA, pl. 6. f. 1.
Sh.e.l.l dark brown; half ovate; broad obliquely truncated, and scarcely notched behind; covered with close regular very thin denticulated concentric lamina, forming a paler external coat. The front ear rather produced, with a distant inferior notch; internally pearly, with a broad brown margin on the lower-edge.
Inhab. North and West coasts of Australia.
2. SPATANGUS ELONGATUS, pl. 6. f. 2.
Body elongate, cordate, with a deep anterior grove and notch; covered above with minute hair-like spines, with scattered very elongated tubular minutely striated spines on the sides; the anterior groves and circ.u.mference of the vent with larger equal hair-like spines on each side; the under surface with a triangular disk of similar spines beneath the vent, and with elongated larger tubular spines.
Inhab. Western Australia.
Having only a single specimen completely covered with spines, it is impossible to describe the form of the ambulacra or the disposition of the tubercles. The lower figures represent the mouth and vent of the animal in detail.
DESCRIPTION OF SOME NEW AUSTRALIAN LEPIDOPTEROUS INSECTS BY EDWARD DOUBLEDAY, ESQ., F.L.S., etc.
THYRIDOPTERYX NIGRESCENS, pl. 5. f. 1.
Head densely clothed with long whitish hairs; thorax and abdomen with black hairs; wings hyaline, the nervures and nervules brown, with a few black scales: base of the anterior and abdominal fold of the posterior more or less covered with black hairs; antennae and legs fuscous brown.
Exp. 10--12 lines.
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