50 JOURNAL OF THE 



rounded ; as long or nearly as long as broad at base ; armed near distal 

 end with a few spines similar to those on the maxilla- ; separated from 

 the sternum by a deep furrow. 



Colors. When alive. Ceph'x and legs def'p glossy black. Abdomeu 

 light brown End- cf ma < ibU s, hairs in end of mandible<^, and on 

 anterior edtfe of maxillie reddish. P-tclla IV alo reddish on upper sur- 

 face. Under par s iigher colored. M» mb nne CuULecting legs to ceph'x 

 a» d the joiuts of the legs whitish. When placed in alcohol thf glossy 

 black after a while disappears, and becomes a dark rufous brown, ends 

 of legs remaining darker because of the presence of numerous v«.ry short, 

 black spines. 



Pachylomerus carabivorus. var. emarginatus, n. var. (fema'e 

 1 specimen.) 



This seems to te a varietal form of P. carabivorus, Labium trapezoirlal, 

 anterior corners rounded ; shorter than broad at base. Ceph'x nearly 

 as broad as long, 10 mm. long Marginal configuration as in P. cara- 

 bivorus, except that the posterior margin is strongly emarginate. Wh le 

 upper portion of cepii'x seeriis to be elevated, showing quite a breadth 

 of membrane which c nnects it with the cox.ie. Middle portion of caput, 

 perceptibly elevat' d and broadened a 1 ttle caulad ol the eyes. Leg-*: 

 4 h, 23.5 mm; 3rd. 19.25 ri.m; 2d, 18.5 mm; 1st, 20 mm In fnmt of 

 ihe U-sliaptd depressi<m the caput is emar.inat^, the depressi-n ext'-nd- 

 ing for a short distance rephalad in the median line. This is seen to a 

 certain extent in some good specimens of P. carabivorus. Otberw.se as 

 in P, carabivorus. 



Pachylomerus carolinensis, Hcntz. female 1 specimen. (Plate 

 V, figs 2 and 3, and 20.) Beitrage zur Kej ntniss <^er T err tetariae, Aus- 

 serer, 1871, p. 147. M gale carolinensis, Hentz ,. Boston Journ IV, p 53, 

 pi. VII, fig 3. 



This specimen I am convinced is the same as the o-'C describ d by 

 Hentz as Mygale carolinensis. The description is very imperfect, and I 

 take this ( pportu' ity of mMkiog it a liiile more compl' te. and • a-y to 

 ident fy. Hjs description is as follows : ' Brownish, very gh^ssy ; cep- 

 hal thorax with :wo slii^ht impressions near the base ; abd« men black- 

 ish, not glossy; third joint of the third pair of I gs very short and 

 crooked; feet 4, 1. 3, 2." Tbe spinal armature is the S'unp as in P cara- 

 bivorus, hut the ceph'x and arrangement ot eyes are quite distinct. Ceph'x 

 longer in proportion to m idth than in P. carabivorus, 10 mm. x 8 mm. 

 in th's specimen. U-shaped depression situated more than two-thirds 

 the distance from anterior margin of caput, making caput larger in pro- 

 portion. In the curve f the U shaped depression, theri is scarcely any 

 depression ; a very faintly depres.-ed line, which is quite readily seen 

 because it is very dark, connects the two well marked depressions at the 

 anterior ends of the U. As Hentz's specimen was a small one, these de- 

 pressions would be smaller than in the specimen I have. Had it been a 

 well marked U-shaped depression, he would have noted it, as he has in 

 the case of May gale trancata.^ 



Caput caudal of eyes slightly elevated, making the slope quite steep. 



Kadial depressions distinct, straight. Base of ceph'x 4 mm; angles not 

 sharply defined; lateral edge from posterior angle to point of g latest 

 breadth curved, with convexity ou; ward, fig. 2, pi. V, represents the 

 ceph'x 01 this species. By comparing it with fig. 1, can be seen the dit- 

 ferences of the two species in the configuration and markings.'-' Fig- 3 



' Boston Journ. IV, p. 55. Spiders of the U. S. N. M. Hentz, p. 16, pi. 

 I, fig i. 



"^ The curvature of the lateral radials I do not think is constant. 



