154 
DESMOTRICHA. By Dr. M. Draudt. 
girardi. 
perspicua. 
Ivyalopter a. 
ribbei. 
niasia. 
Ursula. 
trita. 
metapolia. 
nitens. 
similis. 
orange anal tuft. Forewings blackish-brown with grey veins. A large, cream-coloured spot behind the cell 
and a small indistinct one between the median veins; fringes at the apex white, otherwise grey. Hindwings 
black, suffused with purple blue, fringes white. Length of forewings: 18 mm. Parana; Paraguay. 
C. girardi Dogn. differs from dognini by its somewhat smaller size, black palpi being anteriorly 
white-haired, yellow spots on the shoulders and mesothorax, the abdomen being more bluish-green with white 
dorsal and lateral dots, and the anal tuft being only beneath white, not orange; collar black, with white dots, 
laterally white. The spots on the forewings are white. Expanse of wings: 20 mm. Argentina. 
C. perspicua Schaus. Head black, neck red. Thorax and abdomen above dark blue, the latter sub- 
dorsally whitish. Shoulder-covers brown, striped white and bordered with blue. Underside white. Legs blue 
and white with brown tarsi. Forewings black, with a large hyaline area in and below the cell, below and above 
the lower median vein; behind the cell an oblique hyaline band from the subcosta to the distal margin; above 
the submedian a lavender-grey stripe. Hindwings hyaline with dark blue veins and margins. Expanse of wings: 
35 mm. Bolivia. 
C. hyaloptera Dogn. is larger than the preceding, the body very similar, palpal base dark red; thorax 
and abdomen dorsally striped white. The wings are much more extensively hyaline, of a bluish milky iridescence; 
there only remain black: uniformly narrow margins and an oblique band at the cell-end extending from the 
costa to the distal margin between the median veins, as well as the veins with a deep blue lustre. Expanse 
of wings: 42 to 44 mm. Colombia. 
C. ribbei Dr ace (23 b) is a larger, broacl-winged species, with a black body of an intense blue 
lustre, and an orange-yellow first palpal joint, hindhead and neck; sides of the forehead, hips and venter white. 
The intensely lustrous blue forewings exhibit a hyaline band behind the cell, the hindwings show insignificant, 
small hyaline stripes near the border between the median and radial veins. Panama. 
C. niasia Dogn. (23 b). Black with a blue lustre. The 1st palpal joint, neck and collar carmine; sides 
of forehead white. Abdomen dorsally white. On the broad forewings there is a hyaline band behind the cell, 
extending from the lowest subcostal vein to below the lower median vein and turning beneath somewhat 
round the lower cell-end; the veins traversing it are scaled blue and white. On the hindwings there are traces of 
small hyaline spots. Between the upper median and middle radial vein the ends of the fringes are white. Ex¬ 
panse of wings: 46 mm. Ecuador. 
126. Genus: I>esmoti*iclia Hmps. 
Base of abdomen roughly haired. On the forewings the uppermost radial rises below the upper cell-angle. 
The cell of the hindwing is long, from the lower cell-angle there rise the 1st median and 3rd radial veins, the 
middle radial above it. The under surface in the d is covered with rough scent-scales or hair. More than a dozen 
of mostly brown species marked with yellow transverse spots. 
D. Ursula Cr. (23 c) is one of the larger species, distinguished by the yellow oblique band of the 
forewing, extending from the costal margin to the proximal angle; the veins in the basal half are indistinctly 
striped yellow. The underside of the body is yellow. The under surface of the hindwings is bluish-grey in the 
inner-marginal half. Widely distributed from Costa Rica through Colombia and Guiana, the Amazon down as 
far as Sa. Catharina. 
D. trita Dogn. is much smaller than the preceding, distinguished by the entire black collar and 
shoulder-covers, the abdomen being lustrous blue above, blackish-brown beneath. On the forewings the veins 
are not marked yellow; the hindwings exhibit a club-shaped spot between the 2nd median and 3rd radial vein. 
Expanse of wings: 30 to 31 mm. Colombia; Ecuador. 
D. metapolia Dogn. is allied to trita. Thorax and forewings dull black with a somewhat greenish 
tint; abdomen and hindwings more lustrous blue. The underside of the abdomen is whitish, so is the inner- 
marginal half of the hindwing beneath. Forewing with a broad, yellow transverse band behind the cell, not 
touching the costa. Hindwings unmarked. Expanse of wings: 30 mm. Colombia. 
D. nitens Rothsch. is distinguished by an intense purple lustre on the thorax and abdomen, the latter 
being sublaterally striped white. The chest, the inside of the brown legs, the front of the palpi, and 2 small 
spots on the black head are white. The blackish-brown forewings show a broad, vermilion-reddish oblique 
band behind the cell from the costal margin to the proximal angle; hindwings with a very intense purple lustre. 
Length of forewings: 20 mm. Venezuela. 
D. similis Rothsch. is much larger and has broader wings than nitens. The body and the forewings 
are of a purer black, the veins of the forewings marked lighter, the oblique band is orange-reddish. The hindwings 
are black in the costal halves, towards the proximal margin sooty grey. Length of forewings: 22 mm. Amazon. 
