1948] 
Bryant — Spiders from Mexico 
71 
pernotus (Petr .)=M. pernix, M. felix F.O.P.-Camb., 
nee Peckham, from Guatemala but it lacks the large 
tooth on the upper margin of the fang groove and has 
but one small tooth instead of two teeth near the base 
of the same margin. The tibial apophysis is much 
longer on M. purus and the median area of the dorsum 
is broken into four pairs of dark spots. The female of 
M. pernotus (Petr.) is not known. 
Genus Tomis F.O.P. -Cambridge 1901 
Tomis jonesae spec. nov. 
Figure 17 
Male. Length, 5.1 mm., ceph. 2.5 mm. long, 2.0 mm. 
wide, abd. 2.6 mm. long, 1.6 mm. wide. 
Cephalothorax chestnut-brown, ocular area covered 
with short white scales with a stripe on the median third 
of longer dark bairs that extends onto the clypeus, a 
broad marginal stripe of white hairs from the anterior 
eye row to the posterior margin and a small median .spot 
of white hairs on the posterior slope of the cephalotho- 
rax, carapace rather high, sloping very gradually from 
the anterior eve row to halfway between the groove and 
the posterior margin where it falls abruptly, widest 
posterior to tlie groove, groove very short and in a cir- 
cular depression; eyes , anterior row recurved, eyes very 
unequal in size, a.m.e. separated by little more than a 
line, and from a.l.e. by about double that space but less 
than a radius of a.l.e., small eyes midway between first 
and third rows, p.l.e. smaller than a.l.e. and not on the 
margin of the carapace; quadrangle narrower behind 
than in front and two-thirds as long as wide; clypeus 
about a radius of a.m.e., slightly retreating with a long 
median recurved bristle below a.m.e. ; mandibles dark 
brown, vertical, rather small, fang groove transverse, up- 
per margin with four small teeth, lower margin with no 
teeth, fang with a thick base ; labium brown, longer than 
wide, tip pale and narrower than the base ; maxillae 
brown, not twice as long as the labium; sternum brown, 
flat, about two-thirds as wide as long, with many long 
hairs about the margins, fourth coxae separated by about 
