( 44 ) 



*Dllu,lm rules Hutler, Proc. Zool. Soc. Loml. p. 13. n. 28 (1875) (Ceylon ; Madras ;— Mus. Brit.) ; 



Moore, L,,,. Cr,/l,u, ii. p. ,S. t. 74. f. l.hi (1882) ; Swinh., Pror. Z,«,l. Soc. p. 280. n. 21 (1886) 



(Poona : Bombay, viii.-x.) ; id.. Trims. KnI. i^oc. Loml. p. 165. n. 23 (1890 (Moulmein) ; 



Hamps., llhiHlr. Tij/i. Sj,fr. Lep. Hel. P.M. viii. p. 2. n. 32 (1891) (Nilgiris) ; Swinh., Col. Lep. 



lift. Mux. 0.r. i. p. 34. n. 135 (1892) (Bengal). 

 Diluiliii casuarimK, Butler, Trans. Zool. Soc. Loud. ix. p. Iil5. n. 14 (1877) (Sydney) ; Swinh., I.e. 



i. p. 34. n. 1.34 (1892) (N. S. Wales ; Moreton Bay). 

 *Dihiilia nfhiilosa Butler, /.r. ix. p. (il5. n. 15 (1877) (Cape York; — Mus. Brit.); V>vuce, Proc. 



Zool. Sor. Loud. p. 571. u. 2 (1888) (Aola, Guadalcanar). 

 Dilwlia dhcislripo, Butler, I.e. ix. p. 615, n. l(j (1877) (Hongkong ; N. China; Java; Masuri ; 



Bombay) ; id., lllu.slr. Ti/p. Spsciiii. Lep. Hel. 11. .U. iii. p. 3. t. 41. f. 6 (1879); Moore, Lep. 



Ceyhm ii. p. 3. t. 73. f. 1. hi. \h (l.,p., 1.) (1882) ; Pagenst., Iris i. p. 41. n. 1 (1885) (Ceram) ; 



Hamps., Illustr. Typ. Specim. Lep. Ilet. P.M. viii, p. 2. n. 31 (1891) (Nilgiris, 3000 ft.) ; 



Swinh., 1.r. i. p. 33. n. 1.30 (1892) (China ; Ganjam ; Silhet ; Burmah). 

 *lMudm mehmouiera Butler, Trans. Zool. Soc. Loud. ix. p. 015. n. 17. t. 94. p. 4 (1877) (Silhet ;— 



Mus. Brit.) ; Swinh., I.e. i. p. 33. n. 129 (1892) (Berhampore ; Silhet : Singapore). 

 *n:i„dio waeromera Butler, An,!. May. N.U. (5). x. p. 435. n. 7 (1882) (Sarawak ;— Mus. Brit.) ; 



Swinh., /.(■. i. p. 33. n. 132 (1892) (Ceylon). 

 Sjdiin.r alireiidii Pagenstecher, Jalirb. Nass. Vrr. Nat. xli. p. 104. n. 196 (1888) (Amboina ; nom. 



iiud. " Plotz " in litt.). 

 Psi iidospliiii.r discislriya, Hampson, in Blanf., Fauna Brit. Ind., Moths i. p. 105. n. 1G9 (1892) 



(partim) ; id., 11/ iislr. Typ. Spec. Lrp. Bel. P.M. ix. p. 3. n. 52 (1893) (partim ; Ceylon); 



Semp., Sehni. Pliill/,p. ii. p. 404. n. 52. t. it. f. 5. 6. 7 (/.,iJ.) (1896) (Luzon ; Bohol ; Cebu ; 



Mindanao ; v.-x., xii.-iii.) ; Leech, Traus. En/. Soc. Land. p. 288. n. 07 (1898) (Ichang, viii.) ; 



Pagenst., in Chun, Zoologicu xii. 29. p. 17. n. 17 (1900) (partim; Kinigunang ; specim. ex 



Kalum = Megacorma ohliqua). 

 Dilwlia incrct/i, Swinhoe, I.e. i. p. 33. n. 133 (1892) (Assam). 

 Meyaiioton mclaiiamera, Kirby, Cat. Lep. Ilet. i. p. 682. n. 8 (1892) (Silhet). 

 Meganoton rates, id., I.e. p. 683. n. 11 (1892 (India ; Ceylon). 

 .Vegimotou rales var. a., Spli. ahielimi, id., I.e. sub n. 11 (1892) (Himalaya). 

 Meganoton{'l) menephron, id.. I.e. n. 12 (1892) (Amboina). 

 Meganoton macromera, id., I.e. n. 14 (1892) (Sarawak). 

 .Meganoton casiuirinae, id., l.c. n. 15 (1892) (Australia). 

 .Meganoton nebiilo.ia, id., I.e. n. 16 (1892) (Australia). 



c? ? . A very variable form as regards size and colonr. The individnal 

 variability of this insect was not recognised by Butler, who bestowed no less than 

 fonr names upon the differently coloured specimens, though the insect had already 

 six names given to it. Besides these ten names (jnenephron, discistriga, casuarinac, 

 emarginata, darius, nbietina, rafe.'i, nr.hido.sa, melanomera, macromera) there are 

 two more, increta and nhreiidti, under whieh it has been referred to. An ample 

 supply ! 



On the other hand, Sir George Hampson, knowing that menephron, or iliscistriga 

 as he calls the species, showed a great amount of variability, considered nearly all 

 the oriental Sphingids which have grey forewings marked with black as being 

 individuals of one and the same species. Thus we find knocked together in Fauna 

 Brit. India, Moths I. and IV., under the name of discistriga no less than_^»e species 

 belonging to four genera and to two tribes. 



There are three principal types of aberrations : («) a pale form (,/'. cates^ ; 

 (i) a pale form with conspicnons black medio-costal area on the forewing 

 (/. casuarinae) ; and (c) a dark form (/ menephron). 



The/, casuarinae seems to be confined to Australia and New Guinea, where 

 the brown form is very rare. 



The mesonotum has sometimes two black dots ; the foretarsal segments 2 to 5 

 are often dark brown. Very large specimens occur in the Bismarck Arcliipelago. 



I.arva and i)n])a see above. 



