COLONUS. 247 
Plexippus puerperus, Peckh. Proc. Nat. Hist. Soc. Wisc. 1885, p. 68°; Trans. Wisc. Acad. Sci. vii. 
p. 33, t. 1. fig. 23, t. 2. figg. 28, 23a (¢), t. 3. fig. 285 (2) (1888) *; Occas. Papers Nat. 
Hist. Soc, Wise. iii. 1, p. 15 (2) (1896) °. 
Altus sylvanus, Hentz, loc. cit. p. 364, t. 22. fig. 10(3)°. 
Attus branickii, Tacz. Hore Soc. Ent. Ross. viii. p. 94 (1874) ’. 
Aitus agrestris, Peckh. New and little-known Attide U.S.A. p. 12 (1883) °. 
Total length, ¢ 11, 9 18 millim. 
Hab. Norra America, Georgia, Florida, Texas, California 4>.—Mexico®, Chilpan- 
cingo, Atoyac, Teapa (/. H. Smith); Guaremata* (Sarg), Guatemala city (Sto//) ; 
Panama, Bugaba (Champion).—Soutn America, Colombia ®, Brazil. 
This species is very widely distributed, extending through the Southern States of 
North America, California, Central America, and Brazil. Whether it is, as Peckham 
supposes, identical with Alemena pallida, C. L. Koch, I cannot say; and rather than 
restore the genus Alemena, with a type-species which may never be identified, a new 
generic name is given to include Attus puerperus, Hentz, and an allied form. 
2. Colonus crucifer, sp.n. (Tab. XXI. fig. 13, 2.) 
Type, 2, in coll. Godman & Salvin. Total length 5 millim. 
Carapace dilated behind the posterior eyes, orange-yellow, suffused with brown, the cephalic area divided into 
four square black spots by a yellow cross, with a tuft of white hairs between and behind the anterior 
central eyes and one on the inner side of the anterior laterals. Abdomen white, mottled with brown, with 
five or six dark central dorsal chevrons in the apieal two-thirds ; ventral area speckled with black. Legs 
unicolorous yellow. 
Hab. Panama, Bugaba (Champion). 
A very much smaller species than C. puerperus, but with the characteristic pairs of 
setigerous spines beneath tibia i. 
Group MARPISSE *. 
The genera into which the spiders belonging to this group fall may be distinguished 
as follows :— . 
A. Carapace broadest in the middle, narrowed both in front and behind. 
aa. Tibia i. with 2—2—2—2 spines beneath, or 1—1—1—1 on the 
inside at least. 
a’, Tibia i. with ]—1—1—1 spines on both sides, and 1—1 
laterals on the inner side in addition . . . . . . . . Eprnea, Peckh. 
a’, Tibia i. with 1—1—1—1 spines on both sides, or on the inner 
side only, but no laterals . . . . . . . . . « « « Marpissa, C. L. Koch. 
bb. Tibia i. with 2—2—2 spines on each side beneath, or spines 
more or less obsolete. 
* The term “ Marpissex ” is substituted for ‘ Marptusese,” used by mo for this group, anted, p. 178, the 
generic name Marpissa antedating Marptusa by more than thirty years. 
