586 MR. A. G. BUTLER ON THE SPHINGIDA. 
2. LANGIA KHASIANA. 
Langia khasiana, Moore, P. Z.S. 1872, p. 568. 
Khasia hills ( Godwin- Austen). Type, coll. F. Moore. 
This is a magnificent species. Unfortunately the type is much ruined by mites. 
Genus 7. Triprocon, Bremer. 
Triptogon, Bremer, Bull. de ’ Acad. Imp. St. Pétersb. iii. (1861) ; Butler, P. Z. S. 1875, p. 253. 
1. TRIPTOGON CRISTATA. 
Triptogon cristata, Butler, P. Z. 8. 1875, p. 253. no. 39. 
Vicinity of Darjeeling. Type, coll. W. B. Farr. 
2. 'TRIPTOGON GIGAS. 
Triptogon gigas, Butler, P. Z.S. 1875, p. 253. no. 38. 
Silhet (Statnsforth). Type, B.M. 
3. TRIPTOGON ALBICANS. (Plate XCIII. fig. 6.) 
Triptogon albicans, Butler, P. Z.S. 1875, p. 254, no, 40. 
Massuri (Hutton). Type, coll. F. Moore. 
4, TRIPTOGON SPERCHIUS. 
Smerinthus sperchius, Ménétriés, Enum. Corp. Anim. Mus. Imp. Acad. Sci. Petrop. ii. p. 137. 
no. 1565, pl. xiii. fig. 5 (1857). 
Smerinthus dryas, Boisduyal (nec dyras [sic], Walker), in De ?Orza’s Lép. Jap. p. 37 (1869). 
Japan (Gaschkevitsch). 
5. TRrIPTOGON DISSIMILIS. 
Triptogon dissimilis, Bremer, Bull. de Acad. Imp. St. Pétersb. iii. (1861). 
Smerinthus dissimilis, Bremer, Lep. Ost-Sibir. p. 35, tab. iii. fig. 12 (1865). 
Ussuri. 
6. TRIPTOGON DYRAS. 
Smerinthus dyras (part.), Walker, Lep. Het. viii. p. 250. no. 13 (1856). 
3, Canara (Ward), coll. F. Moore; 2, Ceylon (Wenham). Type, B.M. 
Mr. Walker's description of this species is evidently taken from the two insects (male 
and female) from Ceylon—the colour characters in part from the male (Z. ceylanica, 
mihi), the size from the female. The male in Mr. Moore’s collection is very similar to 
our female, excepting that it is smaller. 
