new Species and a new Genus of Sphingide. 231 
Type in Coll. Joicey. 
Weare greatly indebted to Dr. Jordan for his diagnosis 
and drawing of the genitalia of Polyptychus lapidatus. 
THIBETIA, gen. nov. 
Head large, projecting, with a mesial crest. Antennze of 
3 long and heavy, with short pectinations, ending in a long 
gradually tapering tip. Palpi large, projecting considerably, 
the second joint much larger than the first. Two pairs of 
spurs on hind tibia of nearly equal length, long. Mid and 
hind tarsus with comb. Curved spur of fore tibia very 
strong. Wings short. Apex of fore wing very obtusely 
pointed and sharply curved before apex. Outer margin 
strongly convex before middle and concave before vein 3, 
and again but less so at vein 5. Lower angle of cell nearly 
aright angle with median. Hind wing without lobe at anal 
angle. . 
Type, 7. niphaphylla. 
This genus is close to Angonya, from which it chiefly 
differs in having spurs of nearly equal length on the hind 
tibia, a short body, and a mesial crest on the head. 
Thibetia niphaphylla, sp. n. 
Above: Head, thorax, abdomen, and fore wing dirty 
blackish brown. Fore wing with the first three transverse 
lines pointing basad, the outer one double the width of the 
two nearer ones. Discal line nearly straight, passing just 
beyond end of cell. Two waved postdiscal lines. A sub- 
apical shade of reddish ochreous. A dark brown shade 
cutting off a large apical area. Hind wing dirty blackish 
brown or reddish brown, with a darker border, widest between 
veins 4, 5. 
Below: Base of palpi, breast, abdomen, and large discal 
area of both fore and hind wing dull reddish. A very irre- 
gular brown marginal band, widest at vein 5, on both fore 
and hind wing. A pair of ill-defined curved lines across the 
disc of hind wing, 
Hixpanse 52 mm. 
Hab. Thibet. 
13,323. 
Type in Coll. Joicey. 
EXPLANATION OF PLATE VIII. 
Fig. 1. Polyptychus laydatus. 
tg. 2. Ditto. Clasp of genital armature. 
Fig. 3. Thibetia niphaphylla. 
