ZYGJENIDJE. 39 



Genus EUCHROMIA. 



Euchromia, Hiibner, Verz. bek. Schmett. p. 121 (1818-25); Butler, Journ. Linn. Soc. Zool. 1875, 



p. 363. 

 Euchromia {Phalanna), Walker, Catal. Lap. Het. Brit. Mus. i. p. 218 (1854). 



Forewing long, narrow, exterior margin very oblique ; first and second subcostals 

 emitted from end of the cell, second quadrifid ; cell narrow, extending more than half 

 length of the wing ; discocellular concave, bent close to subcostal, emitting a very- 

 slender discoidal veinlet within the cell, radial recurved downward from the angle ; 

 three medians from angles at lower end of the cell, lower median at one-sixth before 

 the end, much curved downward ; two submedians, upper very slender, lower extending 

 close to posterior margin : hindwing narrow, apex pointed ; costal absent ; subcostal 

 running close along the margin; cell broad, extending more than half the wing; two 

 subcostals from acute end of the cell; discocellular very concave, radial from the 

 middle, very slender or obsolete ; two median branches from acute lower angle of 

 the cell; submedian slightly curved, internal straight. Body long, extending much 

 beyond hindwings ; palpi porrect, small, first joint pilose beneath, second and third 

 squamose ; antennae long, bipectinated ; legs long, smooth. {E. sperchius.) 



EUCHROMIA POLYMENA (Plate 94, Fig. 6, 6a, larva). 



Sphinx Polymena, Linnaus, Syst. Nat. ii. p. 806 (1767) ; Drury, Exot. Ins. i. pi. 26, fig. 1 ; Cramer, 



Pap. Exot. i. pi. 13, f. D. 

 Euchromia Polymena, Butler, Journ. Linn. Soc. Zool. xii. p. 364 (1875). 

 Euchromia (Phalanna) Polymena, Walker, Catal. Lep. Het. Brit. Mus. i. p. 219. 

 Phalanna Polymena, Moore, Catal. Lep. Mus. E. I. C. ii. p. 327, pi. 14, fig. 8 a, b. 



Wings purplish-brown : forewing with three broad ochreous-yellow transverse 

 bands, each divided by black veins ; an indistinct blue spot at base of the costa and 

 a similar spot at end of the cell : hindwing with two similar bands. Body and legs 

 purplish-black; collar, and band on first, fourth, and fifth segments of abdomen 

 scarlet, the third, fourth, and sixth segments with a lateral blue streak ; front of 

 head white. 



Expanse If to 2 inches. 



Larva reddish, anterior and posterior segments smallest ; the segments with 

 two dorsal and two lateral rows of darker red tubercular spots; from the lateral 

 spots radiate a few short black hairs, and from the dorsal dense tufts, those on the 

 fourth to twelfth segments long. Pupa dark purple-red ; in a lax hairy and silken 

 cocoon. 



" Feeds on Gonvolvulacece." (Thwaites.) 



" Colombo. Plains ; on cultivated ground, during N.B. Monsoon. Flies by 

 day ; easily captured." {Hutchison.) 



