BELEMNIASTIS; METAXANTH 1A; STEN( )PHAEA; 
GLAUCOSTOLA. 
By Dr. A. Seitz. 
20 
Publ. 12. III. 1920. 
D. engelkei Rothsch. (42 c). Above velvety black with a golden green base of the hindwing, the forewing enyelhd. 
towards the margin velvety brown. Beneath all the wings have green golden bases and a postcelhdar, golden 
green, small transverse band. From Ecuador. 
D. rhebus Cr. (42 d). Both wings with a bluish-green lustrous basal half, beyond the middle of the rhebus. 
forewing 2 parted, small white spots. Upper Amazon; Sao Paulo de Olivenga. Ega, Fonteboa etc. 
D. carilla Schs. (= cerilla Strd.). Very similar to a Belemniastis troetschi (42 e): body with a metallic carilla. 
golden green lustre, also on the basal parts of the velvety black wings; beyond the middle of the forewing a 
broad, ochreous-yellow transverse band. Carillo in Costa Rica. 
4. Genus; Belemniastis Hmps. 
Hampson established this genus for 3 species allied to the preceding, but distinguished from Belemnia 
by the 2nd subcostal vein rising from the same place with the footstalk of the 3rd to 5th, but running 
separated from the latter, whereas in Belemnia the branches 2 to 5 rise on a common pedicle. The butter¬ 
flies seem to be considerably rarer than the Belemnia. 
B. troetschi Drc. (42 e). Forewing with a broad orange oblique band before the apical third; in the troetschi. 
£ this band is dark orange, in the $ orange-yellow. Costa Rica, Panama. 
B. whiteleyi Drc. (42 d) is larger than the preceding. Forewing with a bronze-golden basal part and ichiieleyi. 
a white postcellular oblique band, hindwing beginning from the base radiantly blue. Guiana and Amazon. 
B. attidates Drc. (42 e). Forewings with 2 purple oblique bands, otherwise similar to the preceding. atiidates. 
Colombia. A striking resemblance in the shape, colouring and marking exists between this Arctiid and the 
Syntomid Napata -splendida (21 a) flying in the same country. 
5. Genus : Metaxaiitliia Hmps. 
This genus, like the preceding, shows homochromatic mutual relations with the Syntomids which the 
insects also resemble in the habitus, but by the completer neuration in the hindwing they are to be placed here. 
Palpi long with a distinct terminal joint, bfent up before the forehead; proboscis long; on the forewing the 2nd 
to 5th subcostal veins are petioled, whereas the 1st rises rather far before the end of the long cell. On the 
hindwing the discocellular is doubly angled. 
M. vespiformis Drc. (42 e). Body black, beginning from the 4th ring yellowish-red, abdominal end respijormi.s. 
yellow. The wings are diaphanous, of a smoky dullness, the veins black. Colombia and Amazon as far as Peru. 
Apparently not common. In the light falling from the side on the wings, they show, particularly the hindwings, 
a magnificent Nile-green reflection. It has an extraordinary resemblance to the Syntomids Osmocneme bracata 
Draudt (29 d) and Ixylasia pyroproctis Drc. (29 d), also to certain Gymnelia , mostly species together with which 
the Metaxanthia fly. 
M. threnodes Drc. (42 e). Smaller, body black, only the chest and abdominal end bone-coloured, threnodes. 
Forewings sooty black, the distal third hyaline, as well as the hindwings with jet-black veins. Hindwings hyaline, 
towards the apex smoky. Captured by A. H. Fassl on the Rio Songo. It strongly recalls certain Syntomids 
from the affinities of the Pseudomyia. 
6. Genus: fttenophaea Hmps. 
Shape and size of the preceding genus, but palpi with entirely stunted terminal joints; the 2nd subcostal 
vein of the forewing is not petioled with the others, but rises before the cell-end, and the discocellular which 
was angled there (on the hindwing even doubly angled), is here but slightly curved in. 2 similar species, both 
of which extend from Mexico to Honduras. 
S. pollinia Bsd. {42 e). Brown, collar and abdomen red. Forewing with a yellow costal stripe, hindwing poiiinia. 
with a transparent basal part. 
S. salatis Bsd. (42 e) resembles the preceding, but the abdomen is black, forewing without the salaiis. 
yellow costal-marginal stripe. 
7. Genus: Grlaiicostola Hmps. 
Owing to its exterior resemblance with Leucopsumis the only species on which Hampson founded this 
genus was described as such. In the habitus it resembles also certain Agyrta (e. g. pandemia 24 b) and in the 
open air it is probably scarcely discernible from other Syntomidae, such as Cyanopepla glaucopoides (23 b), 
Ixylasia schausi (22 b), Mydromera isthmia (23 i), where it flies together with them. Proboscis strong, the 
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