( 381 ) 



All the species nf Leucorliuiiijilni liave a blackish lirown sinuate j)atch on the 

 mesothoraoic tegnla, similar in shai)e to a basal patch on the forewing, and agree 

 also in other respects closely with one another in colour and pattern. 



Key to the species : 



a. Silvery mark of forewing about Kl mm. long, 



reaching beyond postdiscal line . . 311. L. longistriyn. 

 Silvery mark of forewing less than 6 mm. 



long, abdomen with 3'ellow belts or spots . . . b. 



b. Yellow belts of abdomen reduced to trans- 



verse dorsal spots . . . . . 31U. L. ornatas. 

 Yellow belts of abdomen reaching round the 



whole tergite c. 



c. Silvery mark 4 to 5 mm. long, forked . . 308. L. tri/jtolenms. 

 Silvery mark 3 mm. long, lower branch 



obliterated 300. L. dijfum. 



30s. Leucorhampha triptolemus. 



Sphinx triptolemus Cramer, Pcqj. E.c. iii. p. 40. t. 216. f. l" (1779) (Surinam) ; Goeze, Enl. Beijtr. 



iii. 2. p. 2>'.6. n. 86 (1780). 

 Hcmeroplanes triptoUmui, Hiibner, Ver:.. hel-. Schm. p. 133. n. 1426 (1822) ; But!., Trans. Zool. Sor. 



Luiirl ix. p. 543. n. 1 (1877); Druce, in Biol. Centr. Amer., Lep. Het. i. p. 8 n. 1 (1881) 



(Guatemala ; Panama) ; Kirby, Cut. Lep. Het. i. p. 647. n. 1 (18!:i2) (Brazil) ; Rothsch., Nov. 



ZcKii.. i. p. 10 t. 6. f. 10 (1894) ; Druce, I.e. Siippl. p. 303 (1896) (partim ; Mexico). 

 Callioiiima Iriptvlmius, Walker, Lixt Ly>. Ins. B. M. viii. p. 111. n. 4 (1856) (Brazil ; Ega ; Para). 

 Trijilogon triplcilemus, Menotrie's, Enum. Corp. Aiiim. Mux. Petr., Lep. p. 95. n. 1569 (1857) (Brazil). 

 Philami>ilus (1) triptolemus, Schaufuss, Nimq. Otius. i. p. 19 (1870) (Surinam). 

 Madorijx triptolemus, Moschler, Verh. Zool. Bat. Ges. Wieii xxvi. p. 348 (1876) (Surinam). 



cJ?. Yellow belts of abdomen e.xtending from one side of the tergites to the 

 other; forewing with little or no greenish yellow scaling ; silvery mark 4 to 5 mm. 

 long. Palpus, below, much more whitish grey in some specimens than in others. 



6. Harpe (PI. XLVI. f. IG) with a comparatively slender, obtuse, curved 

 process. 



Ilab. Me.xico to Brazil. 



In the Tring Museum 12 (?c?, 7 ? ? from : Jalapa, Me.xico, ii. iv. (Schans) ; 

 Aroa, Venezuela ; Merida, Venezuela, vi. (Briceno) ; Trinidad ; Fort George, i.x. ; 

 Rio Demerara : Amazons ; Rio Dagua, Colombia (Rosenberg) ; Paramba, Ecuador, 

 35U0 ft., v. '07, dry season (Rosenberg) ; 1 ¥ ex coll. Lennep. 



300. Leucorhampha diflFusa spec. nov. (PI. VI. f. lo, d). 



i ?. Like the preceding with coniplch' yellow dorsal belts to abdomen ; fringe 

 of tergites also yellow. Wings deeper in colour, stronger dentate, Ijroader. Fore- 

 wing in basal area and on disc, hindwing in submarginal area, obviously shaded 

 with bluish white scaling : silvery mark only 3 mm. long, not forked proxinially, 

 the jiostericjr iiranch being obsolete ; snbbasal area of hindwing biuisli white. 

 Underside of l)ody and wings more rufous than in tni>tolrmitx, postdiscal area along 

 the greyisli brown border ferruginous. 



i. Ilarpe (PI. XLVI. f. 14) sinuate at end, botli lobes obtuse, tlie upper 

 one the longer. 



Length of forewing : i, 4.j mm. ; ?, 47 mm. 



U<ib. Columbia to Bolivia, jirobably more widely distributed. 



