Publ 31. III. 1915. 
ISANTHRENE. By Dr. M. Draudt. 
49 
I. basiferoides Strand is closely allied to the preceding, distinguished by a narrower black marginal basiferoides. 
band of both wings, at the base of the forewing is only 1 blue spot, forehead and metathorax are quite black, 
as well as the antennae; the 2 first abdominal rings have narrower white-yellow transverse bands. Expanse 
of wings: 42 mm. Peru. 
I. crabronides Dogn. (10 f). Head and thorax black, spotted in yellow. On the vertex and mesothorax crabronides. 
metallic violet-blue spots. Abdomen brownish orange, the 4 first segments black-curled. Antennae yellow- 
brown; legs yellow, the tibiae above and the tarsi blackish. Wings yellowish hyaline, in the costal marginal half 
down to the middle radial vein darker yellow. Only the extremest fringes are black, on the hindwings, towards 
the proximal angle there is somewhat broader black colouring. In Colombia apparently not rare. 
I. atrizonata Dogn. (10 f) seems to be a very variable species, for before me are two specimens differing atrizonata. 
from each other, which do not coincide entirely with the original description, one of which has been diagnosed as 
atrizonata by the author himself. Palpi black with a yellow terminal joint; forehead and base of antennae 
yellow, vertex black intermixed with metallic blue scales. Neck yellow; collar black and yellow, shoulder- 
covers black, bordered by yellow; thorax black and yellow spotted. Abdomen black with subdorsal and sub- 
ventral, metallic blue macular series, each segment with yellow bands. The legs are black with blue spots, 
the tarsi yellow. The wings are yellowish hyaline, at the base of the forewing with a metallic blue spot. Veins 
and distal margins narrowly black, the latter somewhat broader towards the apex of the forewing, as well as 
towards the proximal angle of the hindwing. -— In one of the specimens before me only the 3 first abdominal 
rings are yellow-margined, the rest of the abdomen is spotted in black-blue; in the second specimen, however, 
the rest of the abdomen is quite yellow, only the 3 first rings are black-banded and blue-spotted, the 4th seg¬ 
ments exhibits subdorsal black spots. From East Colombia (Medina, 5000 m). 
I. dorsimacula Dogn. (10 f) is a rather little, stoutly built species; palpi and head are yellow, the vertex dorsi- 
blackish. Antennae yellowish brown; thorax yellow and black spotted, on the metathorax metallic blue scales. macula. 
The first abdominal ring is almost quite light yellow, the following segments black with subdorsal, blue spots 
and orange-yellow median spots increasing in size posteriorly, so that beginning about from the 4th segment 
orange-yellow belts are formed; the last segments are almost quite orange. Wings yellowish hyaline with very 
narrow black margins; at the base tiny blue spots. From East Colombia (Medina, 500 m). 
I. notipennis Btlr. (10 g). Head black, forehead white, on the vertex blue scales, the palpi yellow and notipennis. 
the antennae orange. The thorax is black and yellow striped; legs orange with small black spots. The abdomen 
is black, the two first segments whitish-yellow and orange- red banded, the others show metallic blue subdorsal 
stripes. The wings are yellowish hyaline, the forewing in the costal half as far as down to the middle radial 
orange-brownish, the base of the proximal margin likewise orange. The narrow black distal margins grow 
somewhat broader on the hindwing between the proximal angle and the lower median vein. Amazon (Villa 
Nova). 
I. profusa Hmps. (10 g) is very closely allied to the preceding species and differs chiefly by the more profusa. 
extensively yellow colouring of its body. Head and thorax are orange, the latter black-striped; forehead whitish; 
the antennae are orange, at the shaft partly black-coloured. At the abdomen the 4 first rings are entirely orange, 
only narrowly margined by black; the rest is coloured as in the preceding species, also exhibiting blue lateral 
spots. The wings are lighter than in notipennis, the black spot of the proximal angle of the hindwing sometimes 
bordered by orange. Brazil (Ega, Sao Paulo). 
I. vespiformis Btlr. (10 g) likewise greatly approximates notipennis-, it differs from the two preceding vespiformis. 
species by its larger size and narrow yellow belts on the 4 first abdominal rings, the one on the 3rd segment 
being the broadest; the 4 first segments are beneath entirely yellowish-white. The forewings are in the costal 
half not so dark as in notipennis. From the Amazon District (Villa Nova). 
I. porphyria Wlcr. (= machile H.-Schdjf.) (10 g). Head yellow, palpi, antennae and legs orange; collar porphyria. 
and thorax yellow, striped in black, on the metathorax metallic blue scales. Abdomen black with a purple 
lustre; the 3 first segments show orange-coloured rings, the fourth a yellow one, on which there are ventral, 
white spots. Subdorsal and sublateral, metallic-blue spots. The yellowish hyaline wings exhibit at the base of 
the costal margin a small black and metallic blue spot; costa and basal half of the proximal margin orange; 
the narrow black distal margin expands, from the lower radial vein, to a large apical spot, it also projects proxi- 
mally between the submedian fold and the lower median vein. From Surinam to the Amazon District, reported 
also from Peru. 
1. minor Btlr. (= bromus var. Wlcr.) (10 g) is one of the smallest species resembling felderi (9 1). It minor. 
has a black head, the forehead and spots above the eyes are white. The rest of the body is yellow, shoulder- 
covers and thorax black-striped; on the abdomen black segmental lines. The narrow black distal margin of 
the hyaline wings expands to an apical spot. A subcostal stripe and the base of the proximal margin are orange. 
Described from Brazil, the patria not being precisely mentioned. 
VI 
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