— 131— 



than in N. marxii, and the lateral groups of three distinctly separated. Radial fur- 

 rows on thorax not so deep as in N. marxii, Otherwise the same. 

 II Genus MYRMEKIAPHILA, n. gen. 

 (murmekia, ants nest or hill, philos loving.) 

 (PI. V, figs. 6, 7, 12, 14 and 22.) 



Ceph'x perceptibly longer than broad, nearly^: crescent shaped depression ^ 

 distance from posterior edge, convexity caudad, ends not so extended as in Pachylo- 

 merus; 6 radial lines, sometimes quite indistinct. Greatest width about the middle, 

 narrowing gently to the anterior end, and more perceptibly toward posterior end. 

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

 depression and also narrowing on the sides to this point. 



Eyes. Anterior and posterior laterals forming a rectangle, the height of which 

 is equal to two-fifths the base. Ant-laterals oval, largest; postcentrals near the post- 

 laterals; ant-centrals in a line about j from base of rectangle. Legs 4, 1, 2, 3. Lab- 

 ium, trapezoidal, shorter than broad at base. Maxillas extending forward not quite 

 so much in proportion as in Nidivalvata. See fig. 12, Plate V. 



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

 margin of caput, armed with a strong fang. 



Inner edge only of groove for reception of fang armed with short teeth; front of 

 mandible, on the inside of the insertion of fang drawn out into a three cornered toothed 

 projection, much as in Pachylomerus, but a little smaller; short teeth along anterior 

 half of inner upper edge of mandibles, and few at base of fang. Abdomen elongate, 

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

 length. 



I have been somewhat in doubt about placing this genus in the sub- 

 family Eriodontince, as it has some affinities with members of the subfam- 

 ily Therapho since, division yEpicep/iaii. But I think, after a comparison 

 of the maxillae, with those of Cteniza, Nemesia, and Eurypelma, some 

 species of which have a prolongation of the inner distal end, that the char- 

 acter of the maxillae would place it in the subfamily Eriodoniince. If how- 

 ever it should prove to belong to the Theraphosinae, it would constitute a 

 genus related with, Aepycephalus, Cteniza, Cyrtocarenum, and Cyrtauche- 

 nius, in the group Aepycephali. It can however be separated easilv from 

 these genera by the following characters. 1 



Aepycephalus. "Head high and somewhat pointed, ceph'x broad as long, side 

 eyes form a trapezium, lip broad as long etc." 



Cteniza. '-Side eyes form a trapezium. Lip somewhat three cornered, spinner- 

 ets short and thick. Abdomen great, eggformed etc." 



Cyrtocarenum. "Ceph'x as in Cteniza; but head broader in front. Eyes occu- 

 py whole breadth of head, abdomen and spinerets as in Cteniza etc." 



Cyiiauchenius. "Form of Ceph'x, and position of eyes as in Cyrtocarenum, 

 mandibles not drawn into a point etc." 



As the nesting and food habits singularly resemble those of mem- 

 bers of the genus Nemesia, and the form of the abdomen also, it might 

 be confounded with that genus, which belongs to the group of ' Therapho- 



1 Beitriige zur Kenntniss der Territelarke, Auss. pp. 150, 151, 152, 156 

 and 161. 



