Arthur M. Chickering

“ At distal end of femur is a dorsal snow white cap of scales which may extend over a much longer part of the segment in life.
Abdomen. Ovoid, longer than wide in ratio of 13 : 8; widest near middle; all spinnerets short, first pair most robust, third pair somewhat slender and plainly two-jointed, middle pair shortest and closely surrounded by others; tracheal spiracle near base of spinnerets; apparently colulus indicated by a very small tuft of black bristles. ”

“ Males
Palpal tibial apophysis slender, fully half as long as bulb; embolus long and slender, fully half as long as bulb. . . . . Z. optatus, (p. 410) Palpal tibial apophysis short and robust, about one third as long as bulb; embolus about one third as long as bulb. ”

“ It is, however, my earnest hope that the work presented in this paper will help later students of the family to resolve the troubles which they are certain to encounter. For convenience, all genera and species are arranged alphabetically within their respective groups. ”

“ Eyes. Seen from in front, anterior row recurved so that a line tangent to dorsal borders of ALE cuts off about one fifteenth of the diameter of AME. Posterior row wider than anterior row in ratio of about 10 : 9, wider than middle row in ratio of about 17 : 14. Quadrangle of laterals wider than long in ratio of 25 : 18. Total eye space occupies twenty thirty-firsts of the length of the carapace. Ratio of eyes AME : ALE : PME : PLE = 15 : 8 : 2 : 7. AME nearly contiguous to one another and definitely so to ALE. Middle eyes closer to ALE than to PLE in ratio of about 4 : 3. ”

“ Both tibia and patella short with former only a little more than half as long as latter; femur much bent; tibial retrolateral apophysis long, slender, and sinuous; embolus sickle-shaped from an expanded base (Figs. 215–216) . ”

“ Legs: first pair generally reddish brown with tarsi and middle of metatarsi yellowish white and numerous short white lanceolate hairs on dorsal surfaces especially of tibiae and patellae; second and third pairs yellowish white with distal two thirds of femora dark brown except dorsal surfaces and dark brown distal ends of patellae, tibiae, and metatarsi; fourth pair with femora reddish brown except a narrow dorsal stripe, both ends of patellae reddish brown and also distal ends of tibiae and metatarsi. ”

“ Height of clypeus equal to one sixth of the diameter of AME. Clypeus decorated with a rich coat of long white lanceolate hair which shows some iridescence, two long white bristles beneath each AME, and three long upturned yellowish bristles in lower angle between AME.
Chelicerae. Fairly robust, vertical, parallel; well rounded in front where there are many short white loose scales ”