LITHOPROCRIS; DIPAENA. By Dr. M. Draudt. 
277 
B. dorsisigna Wkr. (32 i) is a widely distributed and common insect, with greyish-brown, darker doraisigna. 
veined forewings with an orange-red base; the collar and thorax are orange-red, too. Expanse of wings: 30 mm. 
Honduras; Panama; Venezuela. 
B. fasciata Schs. (32 i). Body black, with red shoulder-covers and base of forewing. Forewings jasciata. 
otherwise light brownish, at the costal and proximal margins, and on the cellular and submedian folds striped 
black; at the cell-end there is a broad, blackish-brown transverse vein; in the marginal area long, black inter¬ 
nerval stripes; the one between the upper radial veins extends to the cell. Hindwings dark brown. Expanse 
of wings: 34 mm. Costa Rica. 
B. intervenata Schs. (36 a). Body black with a red thorax; shoulder-covers outside bordered with intervenata. 
black. Forewings blackish-brown, with a broad, black proximal margin; in the marginal area black intermediary 
stripes, like in the preceding, and the third uppermost likewise extends as far as the cell. Hindwing black, 
in the disc diaphanous. Expanse of wings: 27 mm. Costa Rica. 
75. Genus: Ijitlioprocris Hmps. 
Differs from the preceding by shorter, porrect palpi covered below with long scales. Antennae above 
in the middle covered with scales. On the forewing the middle radial vein rises above the lower cell-angle, the 
upper one below the upper cell-angle; all the rest like in Balbura. 
L. methyalea Hmps. (36 a). Anterior body and forewings of a metallic bluish-green; abdomen and meihyalea. 
hindwings more blue, the latter in the basal half of the proximal margin hyaline. Expanse of wings: 30 mm. 
Bolivia. 
L. hamon Drc. (36 b) is no Syntomida, but belongs hereto. Head and thorax are coppery brown, the hamon. 
abdomen metallic blue. Forewings coppery golden, at the base suffused with purple. Hindwings purple blue, 
at the costal margin brown, in and below the cell there is a hyaline spot. Expanse of wings: 32 mm. Peru. 
L. postcoerulescens Rothsch. (36 b) deviates by the peculiar formation of the hindwing: the costal postcoeru- 
margin is very convex, on the upper surface there is below the cell a fold with a hyaline border on both sides, 
the proximal margin is provided with very long brown fringes, on the under surface an ochreous-yellow scent- 
scale spot extends from the lower cell-angle to the margin, the proximal margin is turned over, covered with 
brown scales of a silvery gloss, below the median there is another roughly scaled, oval, black spot. Body and 
wings are metallic green, the forewings towards the margin blue. Perhaps it is the the of jason. Expanse 
of wings: 22 mm. Peru. 
L. jason Dogn. is much smaller, on the body metallic blue, forewings golden green, at the base, costal jason. 
margin and distal margin lustrous blue; hindwings greenish black. Expanse of wings: 26 mm. Ecuador. 
* 
76. Genus : IMpaena Wkr. 
Proboscis developed; the erect palpi extend to the vertex, below long haired except the terminal joint. 
The antennae are often thickened in the middle, mostly here on top covered with long scales, otherwise with 
ciliary bristles. Spurs of tibiae short. On the forewing the upper median vein rises below the cell-angle, out 
of which the lower radial vein rises, the middle one above it, the upper one below the upper angle. The subcostal 
veins like in the preceding. The proximal margin exhibits in the in the middle long hair. On the hindwing 
the two lower radial veins rise from the lower cell-angle, or the middle one also from above it, the upper one 
being petioled with the subcostal vein. 6 species are known so far: 
D. acharon Wkr. (= ferruginosa Wkr., rhodura Btlr.) (32 h) is on the body blackish-brown, with acharon. 
a blue and purple reflection, the 3 last abdominal rings above scarlet, in the $ less so; the anal tuft of the £ 
is only below red. Forewings with a purple reflection, at the costal and proximal margins suffused with 
a metallic bluish-green. Hindwings diaphanous, in the $ with a reddish-yellow scent-spot in the cell-end, at 
the margin broadly purple blue. Expanse of wings: 30 mm. Amazon District. __ 
D. contetlta Wkr. (= lateralis Wkr., squamicornis Fldr.) (32 h) is similar, but the abdomen is above conienta. 
scarlet in its whole length, on the sides of the middle rings the ground-colour projects somewhat into the 
red. On the hindwing the diaphanous basal part is greatly confined; the <$ is without the scent-spot. Expanse 
of wings: 28 mm. Amazon. 
D. incontenta Schs. (36 b) is much smaller, on the wings dark red-brown, suffused with violet, parti- incontenta. 
cularly at the proximal margin. Hindwings greyish-black, towards the margin dark blue. On the abdomen 
only the 2 last rings are red above and laterally. Expanse of wings: 22 mm. Colombia. 
D. eucera Fldr. (36 b). In the following species the antennae are not thickened, and the scaly cover cuccra. 
is only short. Head and thorax black, palpi, collar and shoulder-covers orange-yellow; abdomen orange with 
a black dorsal stripe, the last rings quite black. Forewings black with a coppery lustre. A spot at- the base 
of the proximal margin, and an oblique postmedian band are orange. Hindwings orange with a black 
margin. Expanse of wings: 22 mm. Colombia. 
