1930 ] Ant-like Spiders of the Genus Myrmarachne 207 
ANT-LIKE SPIDERS OF THE GENUS 
MYRMARACHNE FROM THE PHILIPPINES 
By Nathan Banks 
In the collection of Arachnida of the Philippine Islands 
in the Museum of Comparative Zoology are a number of 
specimens of the interesting ant-like genus Myrmarachne. 
Peckham described four species and the types are here, 
Karsch described one, and Chamberlin one species. The 
large species, M. maxillosus Koch, known from various 
parts of the Malay region, also occurs in the collection. 
In this paper I shall treat only of the males, believing 
that we know too little as yet to place the females properly ; 
in several cases, however, there are females with males to 
which they evidently belong. I have, therefore, not treated 
of M. edentulus which Peckham based on a female; quite 
possibly it is the female of M. bellicosus. The specific 
characters are best illustrated in the jaws, their shape and 
armature. The male palpi are so nearly alike in the several 
species that it appears they are less useful than in most 
spiders ; the case is similar to that of Tetragnatha. 
The following synoptic table will distinguish the forms 
so far known; doubtless there will be fully as many more 
to be found in the islands. Only one of the species is from 
Mindanao, most of them from Luzon. Except M. maxillosus 
none of the species agree with the species known from 
Ceylon, Malacca, Java, or Borneo. 
1. Two teeth on outer upper edge of each jaw, jaws not 
constricted, fang without tooth, lower outer edge of 
fang-groove with a row of small teeth bidentata 
No teeth on outer upper edge of jaw 2 
2. Inner upper edge of jaw with a prominent tooth be- 
fore tip, and a large blunt tooth-like process at tip; 
jaws not constricted at base, abdomen not con- 
stricted, large dark species maxillosus 
No tooth on upper inner edge of jaw before tip .... 3 
