— 129 — 



I subjoin, for clearne-<s a brief synopsis of his Classification. 

 Suborder Territelarice. This was divided by rhorcil into 3 families, 

 as follows: 



2, lung sacs Caktdisoidcf. 



4, lung sacs. 



a. Wiih >ut spinneiets Liphist idi/r. 



h. With spinnerets llierophoHoidd' . 



i'lii;- fami!\- Theraf)hosoid(£, Thorell, is further dividecT int^i three 

 subfamilies as follows: 



Maxilhie well iToadentd ai tlie bnse, palpi inserted laterally,.. Atypinae Thorell. 



Maxilli^ little broadened at base, palpi inserted laterally, 



Eriodontinae Ausserer. 



Maxillce not broadened at base, palpi inserted on ihe end, 



Theraphosinae Thorell. 

 The The pho.ujhP are then fuitlier divided into two groups, baseti 

 on the relative elevation 1 if the caput above the thorax. 



(I. Capui w.rll elevated, Aepicephali. 



h. C iput not much elevated, Tapinocephali. 



In specific descriptions I have endeavored to not repeat characters 

 which seem at present generic, so that in most cases it will require both 

 the generic and specific characters to identify a single species; for this 

 reason I have given the characters of the genus Puchylomems, established 

 by Aii.sserer. 



Family THERAPHOSOIDAE, Thorell. 



Subfamily Eriodontinae, Auss. 

 I. CJenus Nidivalvata, n. gen. 



{nidus, nest, valcata having folding doors.) 

 (PI. V, figs. 8, 9, 10, 13, 23.) 



Ceph'x little longer than broad; greatest breadth at middle, tapering very gently 

 and equally to both ends; edges of posterior half slightly scalloped; small, deep, cir- 

 cular, depression in center from which radiate to edges of ceph'x 6 depressed lines 

 quite well marked. Caput well elevated, sloping to thorax gently, not broadly arched 

 as in Myrmekiaphila. In front, caput gently drawn toash'ri Munt point about 

 whioh the eyes are crowded. Eyes can be better described by -peaking of ;hem as 

 being HI three groups; the ant-centrals a diameter cr less ds:antand siiuatid at the 

 top and on sides of the hill ; on each side of these, not far separated is a group of three 

 eyes forming a crescent with the concavity toward the middle group; the eyes in this 

 group nearly or quite touch each other. Fig. 8, PI. V, represents the eyes as seen from 

 the front at an angle of 450 to a plane parallel with the base of the ceph'x. 



With this view the ant- and post- laterals form a trapezium, base at post- laterals 

 one-fourth larger than opposite side; height about one- thnd of base, postcentrals 

 slightly in front of base of trapezium. Ant-laterals comparatively large; others vary- 

 ing in relative size in different species, and it may be found, that the relative position 

 varies also as in Pachylomera.s: Maxilla> extended in front, hut not so much as in 

 Erindon. Fig. 10 represents a maxilla showing insertion of palpu.s. Labium triangu- 

 lar, distal end rounded, longer than l)ioad at base. Mandibles strongly kneed in front 

 of perpendicular clypeu:;. 



