cluentius. 
beelzebuth. 
duponchel. 
roseus. 
mortuorum. 
vitrinus. 
lucifer. 
macasensis. 
846 COCYTIUS. By Dr. M. Dratjdt. 
2. Genus: Cocytius Hbn. 
Contains some of the largest Sphingidae known, especially the $$ are often of a very considerable 
size. Separated from the allied genera by the bare, pointedly projecting last palpal joint. Proboscis often of 
an enormous length which may be almost 25 cm in cluentius. The abdominal segments bear more or less distinct 
scale-tufts above in the centre. Anterior tarsus with numerous short prickles outside on the first joint. 
1. Groiip: Disc of hindwing not hyaline. 
C. cluentius Cr. (90 b) is the largest species. Forewing jet-black with a brownish ray in the prolong¬ 
ation of the cell to the margin and in the whole inner-marginal quarter, with double notched lines, the inner¬ 
most line of which very obliquely bends inward almost to the base of the inner margin; 2 yellowish-white 
dots at the cell-end. Abdomen with 5 yellow lateral spots in distinction from the following species. Mexico 
to South Brazil and the West Indies. Larva green, finely haired, with 7 white oblique stripes uniting on the 
dorsum, laterally generally reaching hardly below the centre. On Anonaceae, occasionally also on Piper 
aduncum; pupa with a rolled up case of the proboscis. 
C. beelzebuth Bsdv. (= goclarti Bsdv., vivularis Drc.) (90 d) is of a greener colouring basally and sub- 
marginally than the other species, with a green spot also outside and above the cellular dot. Hindwing neither 
with a transparent disc. Abdomen with only 3 yellow lateral spots. Nicaragua to Rio de Janeiro. Larva hitherto 
unknown. 
2. Group: Disc of hindwing hyaline. 
C. duponchel Poey ( = jatrophae Wkr., vivularis Btlr., affinis Rothsch.) (90 c) is a smaller species, like¬ 
wise intensely mixed with green, abundantly intermingled with white scales, especially in the $ at the apex 
and the marginal area; the two black longitudinal rays below the cell and on its outside are very indistinct. 
The two white discocellular spots are sometimes enlarged and united to a crescent. Abdomen with small heaps 
of very distinct yellowish-white scales above, without a black longitudinal median stripe. Mexico to Bolivia 
and Southern Brazil, also Jamaica and Cuba. Larva very similar to that of cluentius, but the much less distinct 
oblique stripes obsolete above, and there is a dark dorsal line bordered with yellowish on both sides, without 
the fine hairs. Case of proboscis of the pupa shorter than in the other species. — In ab. roseus Gehlen, described 
according to 1 female specimen from Sa. Catharina, all the white spots and streaks of the forewing are pink. 
C. mortuorum R. ct* J. Colouring and marking very similar to that of duponchel, but the black markings 
on the body and wings above are finer. Basal quarter of forewing with a strong white, partly interrupted line 
which is bent distally in the cell; the black longitudinal streaks in the disc are absent, the oblique apical line 
is very thin and interrupted. The thinly scaled place of duponchel is a loam-coloured and densely scaled area 
here. The yellow spot of the hindwing is lighter and only slightly sinuated. Genital apparatus very different. 
Expanse of wings: B 57—60, £ 72 mm. Amazons (Rio Madeira) and South-Eastern Peru. 
C. vitrinus R. & J . is likewise very near to duponchel. Body greyer above, lateral margin of thorax 
white, abdomen of a pure white beneath, the brown median spots very small, the lateral spots lighter yellow 
than in duponchel. the base of the hindwing also lighter yellow above and beneath. Fore wing narrower, the 
interior angle less projecting, distal margin more convex; the green colour is replaced by white and grey, the 
2 black streaks at the apex of the cell are elongated; the large white stigma is reniform, bordered with brown; 
the lines of the median area are more curved at the costal margin, the space between the 3rd and 4th lines 
ochreous on the veins, the 4t,h line very strong; the black oblique apical line borders on a white apical spot. 
The transparent area of the hindwing is much more extensive and extends from the base to the submedian 
fold. Expanse of wings: 58 mm. Cuba. 
C. lucifer R. & J. (= morgani Bsdv., rivularis Btlr.) (90 b) is similar to duponchel, larger and more 
slender on an average, more monotonously green without the white admixture, only the reniform discal spot 
and occasionally a small one above it are white; the 2 black longitudinal rays are very strong below the centre. 
Abdomen without the small heaps of yellowish-white scales, almost invariably with a strong black median 
line. From Mexico to Colombia and Venezuela, also taken in Para. Larva not yet described. 
C. macasensis Clark is presumably most closely allied to duponchel and lucifer, but different from all 
the species known of Cocytius. Base of palpus light yellow, body brown above, abdomen laterally with 3 yellow 
spots, hair-tufts white at the base, abdomen light yellow beneath except the brown apex. Disc of hindwing 
hyaline, but not dentate outside between the veins. Forewing unicoloured dark brown above, all the markings 
indistinct, the black longitudinal streaks distinct but not very prominent; between the costal margin and 
the second median branch there are long red-brown postmedian diffuse markings which are expanded towards 
the margin; a dump-bell shaped yellow spot at the cell-end, a smaller and less distinct spot above it and 
somewhat more apical; fringe yellow, darkened on the veins. Hindwing dark brown above, yellow at the base. 
Length of forewing: 67 mm. Described according to 1 ^ from Macas (Ecuador). 
