ELISHA MITCHELL SCIENTIFIC SOCIETY. 51 



ffprefents the eyes of p. (■nr()lin''n.sis ; fig. 4 of P. cnrahiroi'Hs ; fig 19 

 tarsal claw, spur at base with a, small spine on each side ht it3 base; 

 fiistan of this a sp're divicUd at the end Labium as long or longer 

 than broad at base. 



Eyes. Ant- and post-laterals form a trapezium as in P. carahivorvs, but 

 the ant centrals are situate don a line hallway between the base of the 

 trapezi im and the Of posite side ; the pnst-laterals and cenirals forma 

 curved Ime with convexiiy caudad, instead ■ f a straight line as in P. 

 carahivorvs. 



Sternum as broad as long, 5 mm., broadest part one third from caudal 

 end. 



M}j<jnle .solMltiolifi.^ Hentz : I am inclined to think, is the 

 male of this species. The depressions in the ceph'x are 

 similar, the difference in the lengths of the 2d and 3rd pair 

 of legs is not of much specific importance in many species. 

 The depressions on the abdomen are just what will appear 

 in any of these species, when the abdomen becomes small 

 for want of food, or after the depositing of eggs. In nearly 

 all specimens either one, two, or three, or more pair of cir- 

 cular depressions can be seen. When the abdomen shrinks 

 the space between the depressed dots of each pair becomes 

 depressed in the form of a rectangle as seen in Hentz's 

 {\gurQ of Mj/'/alr solsfitifilis. The difference in color of the 

 two is not of specific importance, for the young of /\ mrahiv- 

 orns have a brow^nish ceph'x, the old a glossy black, and 



when transferred to alcohol, this soon changes to brown. 



Pachylomerus turris, n. tp. lemale, 1 specimen. (Pi. V, fig. 5) 



L\ph'x 6 ij mm long x 6 n m bicjad. Mur^inal configuratit n ^a in P. 

 r.arnhv ms; lateral radial depressiors in torm of crescents with the 

 concavities caudad ; anterior ladial depressions indistinct, but marktd 

 by a de(p, smfill cylindrical punciure; aimature eame as P. cnmbhorvs, 

 with the exception of the lack here and Ihere of a few spines, which 

 may be accidental. 



Sternum nearly as broad as long, distinctly angled between articula- 

 tions of coxa?. Labium shorter than broad at base, nearly triangular, 

 separated from sternum by a furrow. 



Eyes. Upon the arrangement ot the eyes is laid the ffr^ atest stress in 

 establishing this species. Ant- fcind post laterals forming a rectangle; 

 posterior row curved with the cnnvex'iy caudad. 



Tuft of hairs ondyi^eus with f w hairs; also very few hairs or signs of 

 th ir haviiigbeen any, in the th'ee lines caudad of tlie eyes. 



Pachylomerus 4-spincsus, n. sp (PI V, fig. 21.) 



Eyes as in P. -jirolnx nsis. L gs 4, 1, 3, 2, tibia III with deprrsiiion at 

 proximil end, but distal end not enlarged as in the other species. Ar- 

 mature very distinct from the other species. Patella IV with a number 

 of spines; distal end of patella and meta'arsus Til, two spines ; two on 

 proximal end of m* tatartus ai.d two or three on distal end of tibia III : 

 row of spine on each lower side 01 II hud I, arranged thus in each row, 

 one on tarsus, two on mttatar^us, and two on tibia; palpus with a row 



I 



Boston journ. IV. p. 56. Spiders of the U. S. N. M. Hentz, p. 17, 

 pi. l.f. 3. 



