M 1923 12 ] CLARK — THIRTY-THREE NEW SPHINGIDAE 69 



This species belongs to the balsaminae-saclavorum-batschi 

 group, falling between the first species and the other two. 



Palpi olive green, shading to gray on third segment. Antennae olive 

 green, white toward tip, and black at extreme apex. Head, thorax and 

 abdomen above, olive green. Light-colored side stripe extending from 

 above the eye laterally along the thorax. Mesothoracic tegulae reddish 

 brown. Abdomen beneath clay-color irrorated with brown, and shading to 

 light red laterally. Legs clay-color irrorated with brown. 



Fore wing above: Light olive green with dark olive green markings. 

 Wing apex sharply acuminate and black. From the wing apex to the inner 

 margin, which is reached at its median point, extends a dark heavy olive 

 green line, curving first slightly basad and then distad. Basad of this 

 heavy line, which may be called no. 4, extend three parallel lines, nos. 1, 2 

 and 3, lighter in tone than no. 4, and fading away costally. Distally of 

 fine no. 4 there extends from apex to inner margin line no. 5, heavy and 

 dark olive, the space between lines 4 and 5 being filled in with the same 

 dark olive tone. Midway between line 5 and the distal margin extends 

 faintly line 6. Line 7 is faint and submarginal. There is a minute black 

 stigma with a dark cloud apically of it. Distal margin markedly convex. 



Fore wing beneath : Ground tone light brick-red. Basal half black, ex- 

 cept along the costal margin, where it is olive green. From this black area 

 there extend three interrupted black lines. The basal one reaches the costal 

 margin 10 mm. from the wing apex, the median one reaches this margin 

 6 mm. from the apex, while the apical one terminates at the apex. The 

 two proximal lines are interrupted on the veins, the distal one between the 

 veins. A distal marginal band, lighter in tone than the rest of the wing, 

 broadens to a point between R2 and R3, where it attains a width of 6 mm., 

 thence it narrows to the hinder angle. 



Hind wing above: Black with narrow and somewhat interrupted post- 

 median light pink band, broadening anally. 



Hind wing beneath: Light red. Two clay-colored median bands, 

 curving basad and separating as they approach the costal margin. A clay- 

 colored distal marginal band broadens to a point between R2 and R3, 

 where it is 3 mm. in width, thence it narrows anally. 



Rhagastis mjobergi sp. nov. 



Al. ant. long., d\ 26 mm.; 9, 27 mm. Al. ant. lat., <?, 11 mm.; 9, 

 12 mm. Marg. ext., d\ 13 mm.; 9 , 15.5 mm. 



Habitat. — Siantar, Sumatra. One male (the type) in coll. B. Preston 



