s=T 
for) 
or 
1896.] SPIDERS FROM THE LOWER AMAZONS. 
B. Carapace testaceous brown, margined with a broad 
band of dull orange silky pubescence. 
1. Size larger. 18 mm. long (9).—Ceniral ante- 
rior eyes slightly smaller than laterals. Ante- 
rior row slightly procurved ; (posterior margin 
of laterals aligned with centre of medians). 
Laterals distinctly separate, subequal, anteriors 
a little larger. Abdomen with central, longi- 
tudinal, silver-white rufous lanceolate band, 
broad in front, narrowed behind, on apical 
three-quarters, with four, or sometimes five, 
short oblique branching Tinewsen se ee I, siemensi, n. sp. 
2. Size smaller, 10 mm. (2 ).—Central anterior 
eyes a little larger than laterals. 
Laterals scarcely separate; anteriors larger 
than posteriors. Abdomen with central longi- 
tudinal band of silver-white-rufous marks 
(‘‘vitta”), not reaching anterior margin, broad 
in front, narrowed behind, with four short 
branches on either side (‘‘ quadripennata”)... I. pusilla (H. Sim.). 
Remarxs.—The characters of J. digitata, I. caudata, and I, 
siemensi are taken from the type specimens. Those of J. guyan- 
ensis from females from St. Vincent, identified by M. Simon; e 
coll. Brit. Mus. Nat. Hist. Those of J. zebrina and J. pusilla are 
taken from M. Simon’s descriptions of the two species. As to the 
first four there can be no doubt about their distinctness as species ; 
I am not so convinced, however, as to the distinction between 
I. zebrina and I. guyanensis. M. Simon thinks that probably 
I, zebrina and I. digitata are identical. 
The chief distinction drawn by M. Simon between the first two 
is based on the difference between the anterior eyes: “ lineam 
subrectam formantibus” in zebrina; in guyanensis “ lineam leviter 
procurvam.” I must confess that I am unable myself to appreciate 
the distinction between “ a line almost straight” and “ a line slightly 
curved.” The other character, however, given in J. zebrina, “ oculis 
lateralibus subequis et utrinque juata contiguis,” as contrasted with 
“ oculis lateralibus distinete separatis et antico postico majore” in 
I. guyanensis, may be a good one, provided it is drawn from a long 
series of adult examples. The oblique bars in J. guyanensis are six 
in number, the first 3 not united on the median line; of J. zebrina 
M. Simon says, “abdomen atrum in parte secunda lineis testaceis 
obliquis et abbreviatis biseriatis, utrinque tribus, ornatum.” 
It J. zebrina (11 mm. long) and J. digitata (18 mm. long) are 
identical, the characters of the former have possibly been taken 
from an immature female. J. pusilla, too, must be closely allied to 
I. siemensi, tnough the great difference in the size furnishes a 
strong presumption that they are distinct. 
EXPLANATION OF THE PLATES, 
Puate XXXIII. 
Fig. : Melodeus sanguineus, n. sp., 2 (p. 758). Dorsal aspect. 
» niger, n.sp., 2 (p. 759). Dorsal aspect. 
