1972] 
C bickering — Genus Trachelas 
223 
that level, and is wider than anterior row in ratio of nearly 19 : 15. 
Ratio of eyes AME : ALE : PME : PLE = nearly 11 : 12 : 
11 : 10. AME separated from one another and from ALE by 
nearly their radius. PME separated from one another by nearly 
their diameter and from PLE by slightly more than 1.5 times their 
diameter. Laterals separated from one another by nearly 1.5 times 
the diameter of PLE. Central ocular quadrangle wider behind than 
in front in ratio of nearly 33 : 25 ; wider behind than long in ratio 
of nearly 11 : 10. Height of clypeus nearly equal to 1.2 times the 
diameter of AME. Chelicerae: robust; somewhat porrect; parallel; 
somewhat keeled along medial surfaces; only moderately geniculate 
near bases; fang regularly curved; fang groove with three teeth 
along each margin. Maxillae: slightly convergent; lateral distal 
corners extended to a definite pointed termination (Fig. 14, from a 
paratype) ; otherwise essentially typical of males of the genus. Lip: 
nearly three-fifths as long as maxillae; essentially typical of males of 
the genus. Sternum : moderately convex ; longer than wide in ratio 
of nearly 23 : 16; widest between second coxae; the rounded posterior 
end reaches just to bases of fourth coxae which are separated by 
nearly one-half their width; surface granulose; lateral extensions 
between coxae essentially as usual in the genus; anterior border only 
bilobed (Fig. 15) ; lateral margins moderately developed. Legs: 
12—43 in order of length; no true spines observed; trichobothria 
quite conspicuous on tarsi, especially the fourth; first tibia with a 
row of about eight ventral cusps and first metatarsus with a ventral 
row of four or five cusps ; second tibia and metatarsus with somewhat 
fewer ventral cusps (observed on a paratype). Palp: there is a well 
developed retrolateral, distal, tibial apophysis (Fig. 18); other 
essential features shown in Figures 16-17; when the bulb is removed 
from the cymbium the embolus is seen to be accompanied by a trans- 
parent rod or filament closely applied to the embolus and regarded 
as the conductor; this type of structure has been observed in several 
species of this genus from Panama where I have collected a rather 
large number of specimens belonging to this genus. Abdomen: in 
general quite typical of males of the genus; dorsal scutum quite well 
outlined and covers the major part of the dorsum; posterior pair of 
muscle impressions clear but anterior pair very obscure; epigastric 
region on venter considerably chitinized. Color in alcohol : in general 
typical of the genus with few minor variations. 
Female paratype. Total length, including somewhat extended 
chelicerae and spinnerets, 4.46 mm; excluding chelicerae and spin- 
nerets, total length is nearly 4.22 mm. Carapace nearly 2.02 mm 
