ART. 13. NEW AMERICAN AND CHINESE SPIDERS CHAMBERLIN. 9 



yellow, the tarsus blackish. Legs yellowish. Abdomen pale yellow 

 excepting the dorsal and ventral plate, which are dark fiilvons or 

 orange colored. 



Anterior portion of pars cephalica elevated, evenly rounded, pro- 

 truding conspicuously forward over lower part of clypeus, the latter 

 high. Posterior row of eyes recurved, the median eyes nearer to the 

 lateral eyes than to each other. Anterior row of eyes a little re- 

 curved; median eyes smaller than the laterals and much nearer to 

 each other than to the latter. 



Dorsal sclerite of abdomen covering the anterior two-thirds of dor- 

 sum. Epigastric sclerite well separated from the dorsal sclerite 

 anteriorly. 



Palpus of male as shown in Plate 2, figure 16. 



Length, 1.9 mm.; cephalothorax, 0.8 mm,; tibia and patella I, 0.52 

 mm. ; tibia and patella IV, 0.56 mm. 



Locality. — Louisiana : New Orleans. One male. 



Type.— C?it. No. 567, M.C. Z. 



Family ARGIOPIDAE. 



TETRAGNATHA CONFORMANS. new species. 



Plate 2, figs. 13-15. 



Female. — Carapace brown. Sternum darker brown, or more or less 

 dusky, the labium blackish. Legs brown, the joints, especially the 

 tibiae, darkened at extreme distal ends. Abdomen silvery colored 

 above, with the usual median dorsal dark line from which branch and 

 anastamose finer dark lines. Sides and venter of abdomen dark, 

 black or nearly so. 



Ocular quadrangle slightly narrower in front than behind. 



Mandibles outstanding and diverging, as long as cephalothorax. 

 Claw long and somewhat sinuous, untoothed. Upper margin of fur- 

 row bearing a series of seven teeth, of which the most distal, which 

 is well toward middle of length of mandible, is longest, the others 

 decreasing proximad ; at distal end a single large black tooth against 

 base of fang. Along ventral margin of furrow at distal end a large, 

 straight, apically black tooth, and proximad of this a series of nine 

 smaller teeth, decreasing in size proximad, the distal ones more widely 

 separated than the others. See further, Plate 2, figure 13. 



Abdomen widest in front, narrowing conspicuously caudad, at 

 caudal end projecting a little beyond the spinnerets and at interior 

 end projecting in the usual. manner over the cephalothorax. 



Male. — Coloration as in the female. 



Mandible in side view clavately widening distad and then narrow- 

 ing again a little at distal end. Toward distal end above with a 

 single large spine which curves distad. Upper margin with a small 



