Chrostosoma fenestrina (Butler, 1876)

Butler, A. G. (1876). Notes on the Lepidoptera of the family Zygaenidae,
with descriptions of new genera and species. Journal of the Linnean
Society of London, Zoology 12: 342-407; p. 383 (as Laemocharis fenestrina).

4. L. fenestrina, n. sp.

Nearly allied to the preceding species, but the basal area of primaries
less opaque, and a much broader hyaline patch (covering the greater part
of the disk) beyond the cell of primaries; body below (excepting anal
segments), bases of wings, inner margin of primaries, and costa of
secondaries white: expanse of wings 27 millims.

Brazil. B.M.

"The preceding species" in Butler is his no. 3 (p. 383), which he does not
describe but only lists:

3. L. haematica = Glaucopis haematica, Perty, Delect. pl. 31. fig. 6.
L. zantes, Herr.-Sch. Auss. Schmett. fig. 240.
Brazil. B.M.

Hampson, G. F. (1898). Catalogue of the Lepidoptera Phalaenae in the
British Museum, vol. 1, Syntomidae: p. 216 (as Chrostosoma haematica;
in Suppl. 1, 1914, p. 147, Hampson removed haematica Perty and zantes
H.-S. to Saurita and stated "the species will stand as Chrostosoma
fenestrina, Butl.").

451. Chrostosoma haematica.

Glaucopis haematica, Perty, Del. Anim. Art. p. 156, pl. 31. f. 6 (1834);
Kirby, Cat. Het. p. 137.
Laemocharis zantes, Herr.-Schaff. Aussereur. Schmett. i. f. 240 (1854).
Laemocharis fenestrina, Butl. Journ. Linn. Soc., Zool. xii. p. 383 (1876);
Kirby, Cat. Het. p. 137.
Dycladia chalconitis, Druce, P. Z. S. 1883, p. 378, pl. 39. f. 10; Kirby,
Cat. Het. p. 145.

Dark brown; patagia with crimson spots at base; abdomen with dorsal
crimson basal spot and lateral series of metallic blue spots; thorax and
abdomen whitish below. Fore wing with cloudy hyaline streaks on basal
half below costa and in and below cell; a series of clearer hyaline
postmedial streaks between veins 2 and 7. Hind wing whitish, with diffused
terminal brown band widest at costa and in submedian interspace.

Hab. Ecuador (Buckley), type chalconitis in Coll. Druce; Brazil, 2 males,
type fenestrina. Exp. 30 millim. Type zantes in Coll. Staudinger.

Draudt, M. (1915). Chrostosoma. In: Seitz, A. (ed.), The Macrolepidoptera
of the World, vol. 6, The American Bombyces and Sphinges: p. 67 (as Ch.
haematica; corrected in the Additions and Corrections, p. 200: "for
haematica insert the name: Ch. fenestrina Btlr., haematica and zantes are
to be eliminated, there only remains the synonym chalconitis").

Ch. haematica Perty (= zantes H.-Schaff., fenestrina Btlr., chalconitis
Druce) greatly resembles the preceding, but on the vertex the blue colour
is absent, the wings are in the basal part more smoky hyaline and on the
hindwings the continuation of the marginal band towards the base is
shorter. From Ecuador and Brazil.

"The preceding" is decisa, which Draudt describes thus (p. 67):

Ch. decisa Wkr. (12 k) has like the following a black-brown body,
carmine-red spots on the shoulder-covers and on the middle of the first
abdominal ring; metallic blue lateral spots; the underside is white; in
contrast with the following species, the vertex and metathorax are
spotted with metallic-blue, and the brown marginal band of the whitish
hindwings sends forth a long continuation towards the base below the
cell. Amazon, Bolivia.