1909.] NATURAL SCIENCES OF PHILADELPHIA. 229 



greatly enlarged, swollen above and in front, in the female normal, 

 femur of palpus with a row of ten teeth below, much smaller in the 

 female ; legs long, rough ; hind pair longer, no teeth on femur IV of male, 

 coxae IV ends in one tooth above, hind femur nearly two-thirds as long 

 as body. Tarsus I with 7 joints, first four enlarged, II with 15, III 

 with 10, IV with 11 joints. Length, c^ 8 mm., 9 6.5 mm., femur 

 IV, d\ 15 mm. 



From Turrialba, Costa Rica (Tristan). 



Meterginus inermis n. sp. 



Red-brown, mandibles paler, trochanters rather bright yellowish, 

 rest of legs brownish, two large connected spots each side of the cepha- 

 lothorax, the Y-mark indistinct, and a faint transverse line behind. 

 Dorsum smooth, no tubercles; eye-tubercle very broad, smooth; 

 legs spinulose, hind femora with several rows of blunt teeth, largest 

 below, with many scattered rather larger granules ; a series of granules 

 under femur of palpus; second joint of mandibles large, but not much 

 swollen above,' legs rather long, hind pairs plainly larger than others; 

 femur IV nearly as long as body, tarsus I with 7 joints (4 enlarged), 

 II with 14, III with 8, and IV with 8 joints. Length of body 6 mm., 

 of femur IV, 5 mm. 



From Tablazo, Costa Rica, September (Tristan). 



Erginus subserialis Cambridge. 



Biol. C. Am. Arachn. Aran., II, 56-4, 1904. 



Uricuajo (Pac), 250 m. (B. and T.), and El Higuito, near San Mateo 

 (Pac), January (B. and T.). 



Erginus parvulus n. sp. 



Dark red-brown, a few yellow dots each side, and a line across 

 behind the tubercles; legs pale yellowish. Dorsum mostly smooth, 

 a few granules; eye-tubercle spinulose each side; basal joint of mandi- 

 bles very much spinulose above, the second joint is greatly swollen 

 above. Posterior tubercles large, acute, and less than their length 

 apart; posterior segments granulate along the edge. Legs spinulose; 

 coxae III with a little cusp behind, IV with a very large spine at tip, 

 trochanter IV with a small one on inner side at tip ; femur IV about as 

 long as body, much roughened, on inner side near the middle is a series 

 of six teeth, none as long as width of joint, and on outer side near tip 

 is a series of five teeth, none as long as width of joint; patella and tibia 

 IV also much roughened. Tarsus I with 6 joints (3 enlarged), III with 

 7, IV with 7 joints. Length 4 mm. 



From San Isidro, Costa Rica (Tristan). 



