U.S. NATIONAL MUSEUM BULLETIN 100, VOL. 14 PART 4, PLATE 4 
SA 
2. 
RXXYS 
LS 
ecee. 
PTT 
\ 
= Ae 
a 
epee eee 
3 . 
SPECIES OF AMALLOTHRIX AND ARIETELLUS. 
21, 22, Amallothrix obtusifrons (Sars), female: 21, Dorsal view; 22, fifth leg. 
23-26, Arietellus armatus Wolfenden; 23, Dorsal view, female; 24, lateral view, female; 25, 
fifth legs, female; 26, fifth legs, male. 
27-29, Arietellus tripartitus, new species, female: 27, Dorsal view; 28, crest and rostral 
filaments in lateral view; 29, fifth legs. 
