14 
PSYCHE 
[Feliruary 
at the base of each antenna, is a small tuft of 4 to 5 hairs. The antenna is rather 
short, curved, uniformly brown in color, the surface sparsely set with short, stout 
spines and with numerous small spinules scattered on the basal half. The tuft of 
4 or 5 hairs is situated at the middle of the shaft and does not reach the tip of 
the antenna, which has the apex terminated with one long and one short spine, 
two short bristles and a short articulated peg. The eyes are of moderate size, 
semi-circular in outline with a small detached portion at the posterior edge. The 
rotary mouth brushes are thick, with the hairs in the more central part distinctly 
pectinated. The mentum is triangular in form, about as long as broad and with 
slightly curved series of from 12 to 14 small teeth on each side of the apex. The 
mandible is normal, set with small spines at its base. The maxillary palpus is 
short and very broad, with hairs and spines arranged in patches on the surface 
and with a comparatively small apical tuft; the basal joint rather large, with 
small stout spines at its apex. 
The thorax is rounded, with rather short hair tufts issuing from slight angles 
at the sides. The anterior margin also with two short hair tufts. 
The abdomen is long, the anterior two segments transversely oblong and 
with lateral tufts of 4 or 5 hairs; the central and posterior joints lengthened and 
narrower, with only two hairs to the lateral tuft up to segment 7. The eighth 
segment has lateral patches of from 28 to 34 scales, without any regular arrange- 
ment; the single scale has spines at the apex and along the sides, the apical one 
largest and longest, the others diminishing in size toward the base. The anal 
siphon is about four times as long as its width at the base, and has two series of 
toothed spines, each ranging from 17 to 22 in number. The spines are black, 
white tipped, with the teeth not quite reaching the middle; a common arrangement 
is for four teeth to form two pairs. The ninth segment is longer than wide, with 
a double dorsal tuft and ventral brush,- the latter confined to the barred area. The 
dorsal chitinized saddle does not ring the segment. The tracheal gills are onh' a 
little longer than the ninth segment. 
Cule.x niveitarsis ('oq. 
This species was first met with May 9th, on the Garret Mts., near Paterson. 
Only a single fully matured larva was taken; it occurred in a rocky pool with 
larvte and pupm of Cnlex caiiadeiisis and syh’estn's, from which it was at once 
separated by its conspicious rusty brown color and robust form. May 12, a new 
species — niveitarsis £ — hatched from one of the pupm; and it was recognized as 
theretofore undescribed, and the larva was put in alcohol. May 14, another col- 
lection was made, resulting in five specimens of the new species being found. 
