( :5r, ) 



'^ to 4 tum'tlicr. R(i\v "J oi' spines of liiudtiirsus (segiuont Ij Ijcgiiiiiiiig ;it basal 

 foni'Mi. 



<S. Tentli tergite long, comiiresscd, caviuate below, highest, beyond middle, 

 strongly curved at base, then nearly straight, and at apex again curved, ti]i 

 truncate ; the broad and rather long lobe of the sternite flat, slightly curved 

 uj>\vards, deeply sinnate, eacli half rounded externally, angulated at tlie sinns. 

 C'lasjier broad, dilated dorsad before middle, long liair-scales of dorsal margin and 

 scaling jiroximally of ])ateh of modified scales white ; this patch clay-colour, large, 

 tiie scales small, very close together, longer than broad, somewhat narrowed at 

 end, bidentate (PI. LVIIl. f. 3.")) ; harpe witi> a spatulate process, which is curved 

 upwards at end, the obli(jue upper edge irregularly notched and toothed (PI. XXXV. 

 f. 12). Penis-sheath witii tiro long processes close together, one longer than the 

 other (PL XXVIII. f. 33), the longer one denticulate. Eighth segment laterally 

 tufted ; on the inner surface on each side with a series of large friction-scales 

 (PI. LIX. f. 2), which are >iot present in the other two species of tiie genus. 



?. Vaginal plate (PI. XXI. f. 10) much folded, raised mesially from base 

 to vaginal cavity ; the proximal edge of tiie latter raised into a doulile tubercle. 



Larva and chrysalis see above. 



The type of cijrtolopkia is a small ? of this species ; there is no difl'erence 

 between it and tiijctiiihanes either in colour or structure ; the vaginal plate is as 

 in nyctiphanes ; the wings are very much broken at the tips. 



Ilab. North and South India, C'eylou, Andamans, Burmah, Malacca, Borneo, 

 Palawan. 



In the Triug Museum 13 S S, lO ? ? from : Oeylou; Khasia Hills (October); 

 Jaintia Hills: Burmah; Perak; Penang, 2U. vi. '!)8 (0. Curtis); Andamans; Sarawak; 

 Palawan. 



Hi. Meganoton rufescens. 



*Diludia rufescens Butler, Proc. ZoitL Sac. Loml p. 21)0. n. 57 (1875) (N. India ; — Brit. Mus.). 

 Diludia ruhesceiia id., Tmns. Zool. Soc. Loiiil. ix. p. G15. n. 18 (1877) {nain. noc). 

 Pseudosphinx discislrii/a, Hampson (tiou Walker, 185(j), in Blanf., Fauna Brit. Iwl., Moths i. p. 105, 

 n. 169 (1892) (partim). 



c? ? . Palpus as large as in mjctiphancs, second segment shorter than broad 

 (scaling included). Antenna of c? rather thicker than in nyctiphanes. Abdomeu 

 with 3 or 4 distinct yellow side-patches bordered above by a black continuous band 



The species bears a remarkable resemblance to the American Cocytius liicifer. 

 as well as to dark specimens of the Oriental Psiloyrammu mcnepln'on, with which 

 Sir George Hampson confounded it. 



As Butler's earlier Diludia ruj'escens and the present insect belong to two 

 different genera, there is no necessity to reject the uame of rufescens for this 

 Meganotoii. 



S ■ Tenth abdominal segment very peculiar (PI. XXVI. f. 3(J. 31. 32): the tergite 

 gently curved, strongly spatulate, the sides of the dilated apical portion clothed 

 with some long stiff hairs and turned downwards, a})ical margin rounded-truncate 

 (PI. XXVI. f. 30, dorsal view) ; the tergite thin ; the sternite longer than the 

 tergite, suddenly turned upwards near end, and, moreover, produced at the curvature 

 into an obtuse process (PI. XXVI. f. 31), which is compressed like the vertical 

 cleft apical part of the sternite (PI. XXVI. f. 32). Olasper : ventral margin 

 oblirpu' ; dorsal one first straight, then somewhat dilated and turned inward ; apex 

 obliquely rouuded ; patch of frictiou-scales clay-colour, the scales large and multi- 



