1972] 
Chickering — Genus Trachelas 
219 
Parish, Stony Hill, October 24, 1957. The name of the species is 
an arbitrary combination of letters. 
Description. Total length, including the moderately extended 
chelicerae and spinnerets, 6.17 mm; excluding the chelicerae and 
spinnerets, total length is 5.65 mm. Carapace is 2.66 mm long; 
2.04 mm wide opposite second coxae where it is widest; nearly 1.17 
mm tall opposite second coxae where it is tallest; gradually raised 
from posterior border to tallest region; not as abruptly raised as in 
T. bravidus sp. nov. ; with a well defined, rather short, median 
thoracic groove; otherwise typical of males of the genus. Eyes: 
eight in two rows as usual in the genus. Anterior row gently pro- 
curved and posterior row moderately recurved, viewed from above; 
posterior row occupies nearly the entire width of carapace at that 
level and is wider than anterior row in ratio of nearly 13 : 10. 
Ratio of eyes AME : ALE : PME : PLE = nearly 7 : 7 : 6.5 : 
6.5 (where eyes are oval to any degree the long axis is always used 
in measurements). AME separated from one another by slightly 
more than their radius and separated from ALE by a little more 
than their diameter. PME separated from one another by nearly 
twice their diameter and separated from PLE by nearly three times 
their diameter. Lateral eyes separated from one another by nearly 
twice the diameter of AME. Clypeus deeply grooved near ventral 
margin; with height nearly equal to six-sevenths of the diameter of 
AME. Central ocular quadrangle wider behind than in front in 
ratio of nearly 13 : 9; wider behind than long in ratio of nearly 
26 : 17. Chelicerae: robust; geniculate near base; granulose; some- 
what concave along median surfaces ; gently keeled along most of the 
medial margins; lateral margins gently curved distally from base of 
moderately developed basal bosses ; fang regularly curved ; promargin 
of fang groove with three teeth and retromargin with two teeth; 
with well developed scopula along promargin of fang groove. Maxil- 
lae : quite typical of males of the genus in general ; with outer 
distal corners well rounded without a sharp extension such as is seen 
in T. ecudobus sp. nov. from Trinidad, W. I.; with a well developed 
distal medial scopula. Lip: also quite typical of the genus; longer 
than wide in ratio of nearly 6:5; nearly two-thirds as long as 
maxillae. Sternum: moderately convex; typically rebordered; longer 
than wide in ratio of nearly 4:3; with conspicuous extensions between 
first and second and second and third coxae; posterior end bluntly 
rounded opposite bases of fourth coxae which are separated by nearly 
one-third of their width ; surface finely pitted with a short, stiff hair 
arising from each pit; anterior border trilobed as shown in Figure 6. 
