1968] 
Crabill — Eurytion 
231 
than penult; tarsalia 2, narrow than preceding articles; pretarsus 
strongly unguiform. 
postpedal segments. Female gonopods medially fused, uniar- 
ticular. Anal pores present. 
The new species described below differs from all known members 
of the genus in that each coxopleuron possesses two rosettes of gland 
canals. Eurytion lethifer seems most like E. mundum (Chamberlin), 
from Chile, which was initially proposed as the type-species of a new 
genus, Chilerium 5 , here considered to be a junior subjective synonym 
of Eurytion Attems (New Synonym). In E. mundum each coxo- 
pleuron has only one rosette of gland canals. 
Eurytion lethifer, new species 
Holotype: female. Peru: Cuzco, Urubamba at 2880 m. Febru- 
ary 18, 1965. Herbert W. Levi, leg. Deposited in the Museum of 
Comparative Zoology, Harvard. 
GENERAL. Length, 35 mm. Leg pairs, 59. Color, brownish yel- 
low. Shape: last 10 segments slightly attenuate; anteriorly not so. 
antennae. Filiform, not flattened. First 7 articles sparsely clothed 
with long setae; 8-14 densely clothed with short setae, cephalic 
plate. Much longer than wide, 21 : 15. Cephalic suture absent. 
CLYPEUS. Much wider than long. Fenestra minutely punctate, not 
areolate, with 2 inclusive setae. Plagulae absent. Setae: 2 prefen- 
estrals, 2 intrafenestrals, 1 postfenestral, 2 midclypeals. labrum. 
Sidepieces very narrowly separated by triangular midpiece, first 
maxillae. Telopodite lappets scabrous, long. Coxosternal lappets 
absent, second maxillae. Isthmus shallow, narrow, medially hya- 
line, not areolate. Mesodistal process absent. Pore surrounded by 
sclerotized rim. Telopodite: basal condyles both present, equal; 
articles without denticles; claw long, simple, curved. 
prehensor. Flexed, projecting well beyond head margin. Tar- 
sungular edge smooth, not serrulate. Denticles: article 4 with prom- 
inent basal tooth ; articles 2 and 3 unarmed ; article 1 with two 
5 Lunds Universitets Arrskrift, N.F. Avd. 2, Bd. 51(5), p. 23, 1955. 
Explanation of Plate 16 
Eurytion tenebrosum (Meinert) : 2, 5. Eurytion lethifer, sp. n. : 1, 3, 4. 
1. Right prehensor; ventral aspect. 2. Ultimate pedal segment; ventral 
aspect. 3. Ultimate pedal segment; ventral aspect. 4. First and second 
maxillae; ventral aspect. 5. First and second maxillae; ventral aspect. 
