8 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
wreaths of long hairs. Fourth joint weakly separated from third; 
dorsal] margin with two long bristles, each with wreath of long hairs; 
distoventral corner with four long, bare bristles. Fifth joint small, 
inserted ventrally between fourth and sixth joints; sensory bristle 
with numerous thin filaments on broad base, two or three more distal 
short filaments and about four short terminal filaments. Sixth joint 
with one bare bristle distally. End joints bearing five slender bristles 
and two long, stout c- and f-bristles, each with about 12 short 
filaments. Broad surfaces of third joint and distal part of second 
joint with hairs. 
Second antenna (figs. 8B—G): Exopodite: first joint elongate with 
small mediodistal spine; second joint about one-fourth length of 
first; third joint about twice length of second; distal margins of second 
to eighth joints with comb of short spines. First joint without 
bristle; bristle of second joint with marginal spines, reaching end of 
third joint; on left appendage only, second bristle provided with 
marginal spines on proximal part, natatory hairs on distal one-half 
(second bristle at this location atypical for family, and probably not 
present on all males of species). Bristles on joints 3-8 with natatory 
hairs, without marginal spines. End joint with one short, and three 
long, stout bristles, all with natatory hairs, and two short, slender 
bristles, the longer of these having hairs. Endopodite: 3-jointed; 
first joint with five short, bare bristles and one long, stout bristle 
having short hairs on distal one-half and wreath of long hairs near 
middle; second joint elongate with two long, slender bristles on margin 
near middle; third joint elongate, arcuate, with broadest part proximal 
to middle; two short, annulated bristles along convex margin, one 
near distal, other near proximal end; tip of third joint with short, 
curved nonannulate bristle and four or five serrate transverse ridges. 
Mandible (figs. 94, B): Coxale endite not observed. Basale: 
ventral margin with five short, slender, bare bristles and two long, 
stout bristles with wreaths of long hair; one of the slender bristles 
farther in from margin than others. Dorsal margin with two bristles 
at distal corner and one near middle, all bare. Medial surface with 
about five short bristles near proximoventral corner. Exopodite 
reaches middle of first endopodite joint; with two subequal bare 
terminal bristles, proximal bristle with few short hairs; tip of joint 
with blunt process provided with hairs. Endopodite: distoventral 
corner of first joint with one short, bare bristle and three long bristles 
with wreaths of long hairs. Second joint: Dorsal margin with 
proximal group of two and distal group of six bristles; one short 
bristle located on medial side between proximal and distal groups. 
Ventral margin with two bristles proximal to middle and three 
