ROBINSONIA. Bv Dr. A. Seitz. 
343 
that it appears doubtful whether it belongs to the Arctiids. It is characterized by bristly, erect palpi scarcely 
projecting beyond the head. Antennae with 1 pair of thick, short cilia at each joint. Posterior tibiae with a 
single pair of short spurs. Of the veins on the forewing 2 rises from the middle of the cell, 3 before the angle, 
4 at equal distances from 3 and 5, 6 somewhat before the upper angle, 7 petioled with 8, 10 and 9; 11 separately. 
In the hindwing the anal part enlarged to a lobe ending into a point which exhibits some short bristles; vein 5 from 
2; 3 and 4 are absent, 6 and 7 are fused. 
P. hampsoni Dgn. ,,27 mm. Forewing above ochreous-yellow, crossed by a straight black line exten- hampsoni. 
ding from the middle of the costa to the proximal margin just before the anal angle and ending in a black band 
which is narrow on the costal half, stronger at the rest of the border and widened in the apical region. Hindwing 
above black, the costal region as far as just in front of the apex, the central region as far as the marginal 
area and below vein 2 ochreous-yellow, the proximal margin of the lobe provided with long hairs, straw-coloured. 
Fringes black. Under surface of forewing like above, but the black transverse line proximally duller. Under 
surface of hindwing quite ochreous-yellow' except some black at the base and a narrow black band at the 
apex and border. Fringes black; palpi, antennae, head and under surface of the body black with some 
white hairs on the head. Feet black; hips and inside of femora striped white; abdomen yellow. From Mount 
Socorro 3400 m.“ 
27. Genus: Robinsoiiia Grt. 
Shape and size very much like the Bertholdia, but the forewings still more pointed. The discocellular 
of the forewing not angled as it is there, but very oblique; in the hindwing vein 5 is absent. -— Nearly 
all are white butterflies, their forewings often margined dark and crossed by similar bands, without any real 
shining parts. They are distributed from Mexico to South Brazil in a series of partly rather similar species. 
In day-time they are apparently never met with, but they like to come to the light. Many species are, moreover, 
Tare. 
a) Fore w i n g bro a d w i t h a r o u n d a p e x. 
R. evanida Schs. (44 b). Wings almost quite monotonously snow-white, in the disc and submedian evanida. 
space of the forewing and in the disc of the hindwing hyaline patches, abdomen orange. Santiago de Cuba. 
This species has rather broad wings. 
R. formula Grt. This species, likewise from Cuba, has also rather broad Avings. The forewing is broAvn formula. 
with a large, spindle-shaped, white spot below the cell, almost flowing together with a similar spot above the 
anal angle. From the apex a white oblique band extends towards a large Avhite triangle beginning at the cell-end. 
HindAving white with brownish fringes and a yellowish tinge at the anal angle. Rare. 
b) Forewing stretched av i t h a s h a rper a p e x. 
R. prophaea Dogn. (44 b). All white, with only very narrow, yolk-coloured costal margin of the forewing prophaea. 
and yelloAvish abdomen. Peru. 
R. sabata Drc. (44 b) is much larger, white, the costal margin of the forewing and mesothorax dark sabaia. 
brown. Middle of abdomen yolk-coloured with small white median spots. Honduras. 
R. marginata Rothsch. (44 c) is almost like a large prophaea, but in the foreAving beside the costa marc/inata. 
also the distal margin is narrowly yellow. Guihha. 
R. flavicorpus Dogn. (44 cl). One of the sihallest species; white with an orange abdomen; on the flavicorpus. 
forewing the costa is sooty brown, so is the distal margin; but- this distal band emanates proximally in irregular 
teeth. Guiana, discoA'ered by le Moult. 
R. dewitzi Gndl. (— grotei Schs.) (44 d) is A'ery typically marked: forewing white with brown margins; dewitzi. 
a brown oblique band unites the middle of the costal margin with the marginal band at the anal angle. The 
butterfly is common, wide-spread, and varies somewhat. In Mexican specimens the distal white spot extends 
into the apex and the oblique band is slightly curved. Similar specimens are said to come from Cuba (= dewitzi 
Gndl.). Specimens from Merida in Venezuela are particularly large and have long and pointed forewings; AA r e 
figure such a specimen. 
R. punctata Rothsch. (44 d). Here the marginal band of the foreAAdng is only yet dull and incoherent, punctata. 
and at the place where the oblique band flows into the broAvn at the anal angle, there appears another Avhite 
spot. Abdomen posteriorly orange-red. Mexico; rare. 
R. sfmills Rothsch. (44 d). In this species from Trinidad also the brown band vanishes at the proximal similis. 
margin and anal angle. Thereby a superficial resemblance is produced in the colouring Avith that of Turuptiana 
lacipea (39 1). 
