1930 ] Ant-like Spiders of the Genus Myrmarachne 213 
greatly swollen, and the swelling starts rather suddenly, 
each upper edge with a carina, lower inner edge with four 
teeth in apical part and some small ones on basal part, outer 
edge of fang-groove marked by a row of small teeth, those 
near tip scarcely larger and not noticeable from side ; fang 
sinuous, no tooth. Palpi short, tibia hardly as long as tar- 
sus. Sternum not very narrow, at coxse 1 fully one-half as 
wide as at coxse 2. Legs long and slender, tibia 1 fully two- 
thirds as long as jaw, with four pairs of spines, and an 
extra one near tip. Abdomen short, not constricted, rounded 
above, the two shields practically united. 
Body. — Length 4.5 mm. 
From Butuan, Mindanao (Baker). 
Myrmarachne mcgregori sp. nov. 
Figs. 9, 14. 
Cephalothorax red brown, clothed with appressed white 
hair, eyes on black spots, jaws dark red brown, legs pale 
yellowish brown, front pair rather darker, palpus mostly 
pale, abdomen black above, paler beneath. Cephalothorax 
deeply cut behind eyes, and the side furrows also deep, 
thoracic part sloping behind; eyes of second row a little 
nearer to A. S. E. than to third row. Jaws much longer 
than cephalothorax, very large, basal part constricted, api- 
cal part much swollen, but the slope rather gradual, from 
above not twice as broad as at base, lower inner edge with 
about five teeth, outer edge of fang-groove marked by a 
row of teeth of which several near the tip are larger and 
noticeable from side ; fang strongly sinuous, no tooth. Palpi 
much shorter than jaws, tibia 1 not two-thirds as long as 
jaw, with four pairs of spines. Sternum narrow, not one- 
half as wide at coxse 1 as at coxse 2. Abdomen rather 
short, but little longer than the swollen part of jaw, evenly 
convex above, not constricted, but with two distinctly sepa- 
rated shields. 
Body. — Length 3.2 mm. 
From Sarai, Paete, Laguna (McGregor). 
