56 



length of the second, cylindrical, rounded at the apex : antennae of the 

 male strongly bipectinate for about two-thirds of their length, the pec- 

 tinations fringed with delicate seta3 ; of the female simple: head densely 

 clothed ; a fascicle of hair-like scales at the base of the antennae : tho- 

 rax densely clothed, slightly crested behind : wings entire ; anterior 

 rather broad : anterior tibiae of the male furnished with an elongate 

 corneous lobe : posterior tibiae quadrispinose : abdomen tapering, ra- 

 ther long ; anal tuft short. 



In the perfect state this genus very much resembles Stauropus, whilst 

 the larva is not very unlike that of Cerura, as will be seen by a refer- 

 ence to figs. 1 and 3 of the plate. Its situation is evidently near to 

 both those genera, probably between them. From Stauropus it may 

 at once be known by its quadrispinose posterior tibiae, its more elon- 

 gate maxillae and its triarticulate palpi : Stauropus, too, has the pec- 

 tinations of the antennae longer, the abdomen shorter, more tufted at 

 the extremity and furnished with dorsal tufts, which are wanting to 

 the present genus. Its antennae at once distinguish it from Cerura. 



This genus appears to be confined to the warmer parts of the United 

 States, for I am not acquainted with any species save the three in my 

 possession, which were all captured at St. John's Bluff, East Florida, 

 by means of my lamps, in the months of April and May, 1838. The 

 only one of these which I shall describe is the species which I consi- 

 der typical, and to which the larva and pupa figs. 1 and 2 belong. — 

 The others I leave to be described by Dr. Harris, who at present has 

 my most perfect specimens. 



The larvae figs. 3 and 5 and the pupa fig. 4, belong to one of these, 

 a fine moth, with the anterior wings olive green, slightly clouded with 

 ferruginous, and marked near their outer margin with a row of subtri- 

 gonate blackish spots. My object in giving the outlines of these two 

 larvae is to call particular attention to the lower figure, which, in the 

 drawing, is represented crawling on a branch of Sty rax grandi folium, 

 evidently using its posterior prolegs to hold by. As no memorandum 

 is attached to the drawing, we are left to conjectures only. The most 

 probable is, that the young larvae are able to use these prolegs up to 

 the time of their last moult, when they become useless. The young- 

 er ? larva fig. 5 is green, with the markings flesh-coloured, the older .'' 

 fig. 3 is buff, mottled immediately above the legs with greenish and 

 white ; the large dorsal patch, prolonged at the sides nearly to the 

 head and tail, is of a lilac hue, marked on the sides with darker, and 

 on the back with buff-coloured dots. 



