AMBULIOmJE. 11 



Genus AMBULYX. 



Ambulyx, Westwood, Cabinet of Orient. Entom. p. 61, pi. 30, f. 2 (1847) ; Walker, Catal. Lep. Het. 

 B. M. viii. p. 120 (1856). 



Forewing considerably arched towards tte end, apex very acute and falcate, 

 exterior margin veiy oblique and sligbtly uneven, posterior margin much, recurved ; 

 first subcostal emitted at one-third and second at one-seventh before end of the cell, 

 fifth immediately beyond end of the cell ; discocellular obliquely concave ; radial 

 from below the middle ; cell narrow, extending to half the wing; middle median at 

 one-fifth and lower at two-thirds before end of the cell ; submedian recurved, lower 

 basal branch at one-fourth from the base : hindwing short, exterior margin slightly 

 scalloped ; cell extending to one-third the wing ; a short oblique subcostal spur 

 joined to costal ; two subcostal branches on a short footstalk beyond the cell ; 

 discocellular recurved ; middle medlian at one-sixth and lower at one-half before end 

 of the cell. Body moderate, anal segment in male with slight lateral tuft ; head 

 tufted at base of antennse ; palpi broad, second joint ascending to vertex, third joint 

 minute, conical ; antenna pectinate-ciliate, slender at tip. 



AMBULYX AUEIPENNIS (Plate 79, Fig. 1, 1 a, b, larva). 

 Ambulyx auripennis, Moore, P. Z. S. 1879, p. 388. 



Male : forewing pale brownish yellowish-ochreous, palest basally, and tinted 

 with olivaceous externally ; crossed by two very indistinct antemedial sinuous slender 

 brown lines, two distinct curved discal sinuous lines, and a more prominent brown 

 curved submarginal line, each line most distinct at the costal end ; a curved costal 

 streak before the apex; a dark sap-brown spot at base of the cell and a larger spot 

 below the cell : hindwing brownish-ochreous, costal border yellowish ; crossed by 

 three short blackish sinuous fasciae. Body pinkish ochreous-brown ; frontal band 

 broad, lateral band on thorax, and a narrow dorsal line sap-brown ; palpi, pectus, 

 and anal segments beneath ferruginous. 



Expanse 3 inches. 



Larva pale green, ringed with darker green granular spots ; a very pale yellow 

 lateral oblique stripe on fifth to last segment ; claspers dai'k spotted ; horn purple 

 vsT-th whitish tubercles. Pupa reddish, with yellowish tinged head, thorax beneath 

 and abdominal rings. 



" Feeds on Dipterocarpus." {Thioaites.) 



AMBTJLYX THWAITESII (Plate 80, Fig. 2, 2 a, b, larva). 



Yellowish-ochreous, the basal, discal, and apical area deeper coloured ; crossed 

 by an antemedial angulated line and postmedial sinuous blackish lines, a submarginal 

 duplex line terminating in a greyish streak below the apex ; a grey spot at end of the 



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