( 44 ) 



*nihi<r„i mlex Butler, I'ror. Zool. Hoc. Loud. p. 13. ii. '28 (1875) (Oeylon ; Madras ;— Mus. Brit.) ; 



Moore, Lqi. (',i/l<i,i ii. p. :i. t. 74. f. lA,i (1882) ; Swinh., /'/■«.«■. Znu/. Soc. p. 2811. n. 21 (1886) 



(I'oona; Bombay, viii.-x.) ; id., Tran.t. Knt. Soc. Loiiil. p. 105. n. 2.'? (1890 (Moulmein) ; 



Hamps., Jl/n-ilr. Typ. S/>ec. Lcji. llel. n..U. viii. p. 2. n. 82 (1891) (Nilgiris) ; Swinh., Cat. Lcp. 



Ilcl. Mux. Ox. i. p. .34. n. 135 (1892) (Bengal). 

 Diliidiii caximriiiiie, Butler, Trans. /Cool. Soc. Land. ix. p. (;15. n. 14 (1877) (Sydney) ; Swinh., I.e. 



i. p. 34. n. 134 (1892) (N. S. Wales ; Moreton Bay). 

 *Diliidia nehidosa Butler, /.r. ix. p. (!!."). n. 15 (1877) (Cape York ;— Mus. Brit.); Druce, Prnc. 



Zool. Soc. Loud. p. 571. u. 2 (1888) (Ada, Guadalcanar). 

 DIhidki discixlriga, Butler, I.e. ix. p. 615, n. 10 (1877) (Hongkong; N. China; Java; Masuri ; 



Bombay) ; id., Illmti: Typ. Sjiecim. Lep. Ilel. li.JI. iii. p. 3. t. 41. f. (1879); Moore, Lep. 



Cc>/ln,i ii. p. 3. t. 73. f. 1. la. U (!.,])., i.) (1882) ; Pagenst., Iris i. p. 41. n. 1 (1885) (Ceram) ; 



Hamps., Ilhisli: Typ. Spccim. Lep. Het. B..V. viii. p. 2. n. 31 (1891) (Nilgiris, .3000 ft.) ; 



Swinh., I.e. i. p. .33. n. 130 (1892) (China ; Ganjam ; Silhet ; Burmah). 

 *l),hidia iiiclanoiiieni Butler, Trans. Zool. Soc. Loud. ix. p. G15. n. 17. t. 94. p. 4 (1877) (Silhet ;— 



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

 *D;iiid!<, niarromera Butler, Ann. Mag. N.IL (5). x. p. 435. n. 7 (1882) (Sarawak ;— Mus. Brit.) ; 



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

 SjiJihi.r ahrendll Pagensteoher, Jahrb. Nasx. V,ir. Xat. xli. p. 104. n. 190 (1888) (Amboina ; nam. 



mid. "Plotz" in litt.). 

 Pxaidosjihiiu- discistriga, Hampson, in Blanf., Fauna lirit. Ind., Moths i. p. 105. n. 169 (1892) 



(partim) ; id., llliistr. Typ. Spec. Lep. Eel. B.M. ix. p. 3. n. 52 (1893) (partim ; Ceylon); 



Semp., Schm. Philipp. ii. p. 404. n. 52. t. II. f. 5. 6. 7 {t.,p.) (1896) (Luzon : Bohol ; Cebu ; 



Mindanao ; v.-x., xii.-iii.) ; Leech, Trans. En/. Soc. Lond. p. 288. n. 67 (1898) (Ichang, viii.) ; 



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



Ralum = Meyacorma ohliqua). 

 D'dudia increhi, Swinhoe, I.e. i. p. 33. n. 133 (1892) (Ass;im). 

 Meganoton melanomera, Kirby, Cat. Lep. Ilet. i. p. 682. n. 8 (1892) (Silhet). 

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

 Meganoton rates var. a., Sph. ahietina, id.. I.e. sub n. 11 (1892) (Himalaya). 

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

 Meganoton maeromera, id., !.e. n. 14 (1892) (Sarawak). 

 Meganoton casuarinae, id., I.e. n. 15 (1892) (Australia). 

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



c? ? . A very variable form as regards size and colour. The iiidividnal 

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

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

 six names given to it. Besides these ten names {menephron, discistriga, casuarinae, 

 emarginata, darius, abietina, rates, nebulosa, melanomera, maeromera) there are 

 two more, increta and ahrendti, under wJiich it has been referred to. An ample 

 supply ! 



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

 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, Mot/is I. and IV., under the name of discistriga no less than A^e species 

 belonging to/our genera and to two tribes. 



There are three ju-incipal types of aberrations : (a) a pale form (_/. rates) ; 

 (/>) a pale form with conspicuous black medio-costal area on the forewing 

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



They, casuarinae seems to be confined to Australia and New Guinea, where 

 the brown form is very rare. 



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

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



I.arva and pupa see above. 



