1930 ] Ant-like Spiders of the Genus Myrmarachne 211 
little enlarged at base, tibia 1 with five outer and four inner 
spines. Sternum not very narrow, about as broad between 
coxae 1 as between coxae 2. Abdomen elongate, much con- 
stricted at basal third, with two separated shields, and 
showing some trace of dark marks. 
Body. — Length 8 mm. 
From Mt. Makeling (Baker) also females probably be- 
longing thereto, and a female from Calayan Island, 
(McGregor) . 
It is related to M. plataleoides Peck, from Ceylon, but the 
swollen part of the jaw is longer, and the tibia of palpus 
though elongate is not as much so as in M. plataleoides. 
Myrmarachne opaca Karsch 
Fig. 12. 
Cephalothorax dark red-brown to black, the mandibles 
also; legs yellow brown to dark brown, often not marked; 
abdomen dark, nearly black. Cephalothorax quite deeply 
cut back of eyes, the thoracic part rising somewhat behind 
before sloping off to tip ; eyes of second row plainly a little 
nearer to A. S. E. than to third row. Jaws fully as long or 
longer than the cephalothorax, constricted on basal half, 
but not as much so as in tagalica or mcgregori , about as 
much as in M. bellicosus, from above about one-half wider 
in widest place than at base, each edge with a carina, that 
on the inner side of apical part especially strong, on sides 
and above transversely wrinkled ; lower inner edge with six 
or more teeth, those on apical part fairly large, but hardly 
at equal distances apart, lower outer edge of fang-groove 
marked with a long row of good-sized teeth, plainly visible 
from side all along to near the base; fang sinuous, and 
near middle with the beginning of a tooth. Palpi nearly as 
long as the jaws; the tibia about equal to tarsus; legs long 
and slender, the front tibia very long and with five pairs of 
spines; sternum moderately slender, plainly wider at coxa 
2 than at coxa 1 ; abdomen rather short with one large 
shield above which on the anterior sides shows an indenta- 
tion each side. 
Body. — Length 6. 5-7. 5 mm. 
