46 JOURNAL OF THE 



atarsus I, three rows of long spines on under and anterior surface Palpus, 

 tarsus and tibia a somewhat double row of long spines on each si'Je; 

 patella, one or two spines on interior surface 



Labium separated from sternum by a deep farrow. 



Colors. Upper surface Ceph'x and legs, olive browm. Under surface 

 legs dull yellowish Sternum a little darker. Maxillae dull rufous, with 

 reddish hairs. Ocular prominence black. Ablomen dull yellowish un- 

 derneath, brownish yellow above, wjth two rectangular rich dark brown 

 spots on anterior end Mandibles rufous. Colors little change 1 in al 

 cohol, not so bright however, and marks on abdomen aisappeared. 



2. Nidivalvata angustata n sp. female 2, specimens. 



Ceph'x oblong, 5f mm long by 4 mm broad Caput in front below 

 eyes perceptibly narrowed; caudad of ocular prominence perceptibly 

 elevated, making the descent to the thorax steeper than in N. marxii. 

 Legs 4, I, 2, 3. Anterior central and 1 teral eves dark, the others light ; 

 posterior centrals much smaller comparatively than in iV". m irxii, ani the 

 lateral groups of three distinctly separated. Radial furrows on thorax 

 not so deep as in N. marxii. Otherwise the same. 



II Genus MYRMEKIAPHILA, n. gen. 



{murmekia, ants' nest or hill plulos loving ) 



(PI, V, figs. 6, 7, 12, 14 and 23.) 



Ceph'x perceptibly longer than broad, nearly J- : crescent shaped de- 

 pr'S^on^ distance from posterior edge, convexity caudad, ends not so 

 extended as iu Pachylomeru^; 6 radial lines, s )metimes qui e indistinct. 

 Greatest width about the middle, narrowing gently to the anterior end, 

 and more percepdbly t )ward posterior end 



Caput large, high and broadly arched in the anterior f , then steeply 

 descending to depression aad narrowing on the sides to this point. 



Eye^. Anterior and posterior laterals forming a rectangle, the height 

 of which U equal to two fifths the b ise. Ant-laterals oval, largest ; p jst- 

 centrals near the post laterals; ant-centrals ia a line aboat f from bise of 

 rectangle. Legs 4, 1,2,3. L ibium, trapezoidal, shorter thaa broad at 

 base. Maxillse extending forward not quite so muc;h in proportion as in 

 Nidivalvata. See fig 12, Plate V. 



Mandibles, half or more than half as long a3 ceph'x slightly kneed in 

 front of mirgin of caput, aroaed with a strong faog. 



Inner edge only of groove for reception of fang armed with short 

 teeth; Iront of mandible, on the inside of the insertion offmg < rawn out 

 into a three cornered toothed pr jection, much as in Pa':hylomerus, but a 

 little smaller ; short teth along anterior half of inner upper eJge of 

 mandibles, and few at base of fang. Abdomen elongate, cylindrical, 

 tapering gently to each end. Spinnerets 4, upper pair medium size and 

 length. 



I have been somewhat in doubt about placing this genus 



in the subfamily Eriodontuiae, as it has some affinities with 



members of the subfamily Theyaphosince, division JEpice- 



phali. But I think, after a comparison of the maxillae, with 



those of Cteniza, Nemesia, and Eiui/pelma, some species of 



which have a prolongation of the inner distal end, that the 



character of the maxillae would place it in the subfamily 



Eriodontuiae. If, however, it should prove to belong to the 



Theraphosinae, it would constitute a genus related with, 



Aepycephalus, Cteniza^ Cytocarenum^ and CyrtaucJienius, in the 



