Although the butterfly seems to occur so frequently, we are not aware that the caterpillar has been noticed by any competent observer since the time of Madam Merian, at least no notice of it has been published since. It was long suspected that her figure of it was unworthy of credit, but from what has been recently observed in relation to the larvæ of kindred species (particularly that of _T. Rhipheus_), it now appears probable that her information was correct. Anomalies similar to those which characterise the perfect insects, likewise attend them in their previous state. They are covered with spines, as is the case among many of the _Nymphalidæ_, and they are provided with a retractile tentaculum as in _Papilio_. In the present instance the spines are remarkable for their length and rigidity, particularly those on the anterior and posterior segments. [Illustration: PLATE 30. _Rhipheus Dasycephalus._ From China. _Lizars sc._ #/ ] RHIPHEUS DASYCEPHALUS. PLATE XXX. Urania Rhipheus, _Var. Cramer, Godart_.--Rhipheus Dasycephalus, _Swainson, Zool. Illus._ Pl. 131. We have copied the accompanying figures from Drury’s work on exotic insects, in order that they may be compared with those represented on Plate XXVIII. It will at once be perceived that they present numerous points of agreement, as well as very obvious differences, and when every consideration is taken into account, it is not easy to say whether they ought to be regarded as distinct species, or merely varieties of the same. Drury states that his insect was brought from China, and when the drawing was taken, it was in the possession of Captain May of Hammersmith; in all probability, however, it is now lost. The antennæ are described as black and knobbed at their extremities, and the hinder wings are without tails.