replaced by a very faint false nervure. Posterior wings sub-trigonate, tailed, anal angle produced into a tooth; costal nervure wanting; sub-costal slightly curving outwards, terminating in the tail, emitting one nervule to the anterior margin, just before the outer angle, another to the outer margin a little before the tail; median nervure slightly curved, terminating in the tail, emitting a nervule to the anal angle; between these two nervures is a false nervure or fold, which runs directly along the middle of the wing from the base to the tail, where it appears to unite with the median nervure. Tibiæ (apparently) all simple. Abdomen short, clothed with long hair.
Th. Zaida. Anterior wings diaphanous, nervures, costae, outer margin and cilia fuscous, disk and inner margin orange: posterior wings orange, with a large black spot at the anal and outer angles: tails black, tipped with white: cilia of the wings orange, of the tail black nearly to the apex: head, thorax, feet and abdomen orange: antennae black.
Inhabits Northern India. In the collection of the British Museum. This beautiful insect is nearly allied to Himantopterus fuscinervis, Wesmael, of which a wood-cut is here given.
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Himaniopterus fuscinervis.
The neuration of the wings is very peculiar, especially that of the posterior; and I am by no means certain that in these I have given the right names to the nervures. The mouth, unfortunately, I cannot examine, both the specimens having been touched underneath with some substance, which entirely prelcudes any attempt at such examination. Its station in the system cannot be very far from the Lithosiidae. London, May, 1843.E. Doubleday.
