64 : ARANEIDEA. 
often more nearly straight, and slightly dilate at the apex. Sternum not produced between coxe iil. and iv. 
Central pair of spinners more or less cylindrical. Mandibles stout, often gibbous at the base above. 
Lateral eyes often set on a small tubercle. 
This genus is well represented in the Central-American fauna. The species known 
to me can be divided into two distinct groups, which may some day receive names and 
be ranked as genera. The chief difference lies in the form of the maxilla, almost 
straight in C. bulbosa and C. bulbula, rounded in the other species. 
We have not received specimens of any of the six species previously described 
(C. cinnamia, E. Sim., excepted) from within our limits, and I have not attempted to 
include them in the following table :— 
Males. 
A. Eyes, as a group, more widely separate, anteriors one diameter of the centrals 
apart. Maxille more than twice as long as the labium, almost straight, 
dilate at the apex, concave at the middle of the outer side. Carapace 
broad in front ; cephalic area abruptly inclined behind. 
1. Protarsus i. with 2—2 spines beneath and a single central apical spine. 
Abdomen with a dorsal and ventral scutum. Lower margin of fang- 
groove with 6 teeth. : soe oe wie oe bulbula, sp. 1. 
2. Protarsus i. with 2—2 spines beneath, but no central apical spine. 
Abdomen without dorsal or ventral scutum. Lower margin of fang- 
groove with 4 teeth. 6 oa wg ea 
B. Eyes, as a group, much closer together, anteriors seldom over half a diameter 
of the centrals apart. Maxillee shorter, half as long again as labium, curved, 
not dilate, convex on the outer side. Carapace narrowed in front; cephalic 
area gradually inclined behind. (Protarsi i. and ii. without any apical, 
central spine.) 
a. Legs not granulose, the coxe alone slightly so. 
* Abdomen without dorsal scutum. Bulb with two spines at its apex and 
a racket-shaped membranous process. (Lower margin of fang-groove 
with 5 teeth.) 
1, Clypeus higher, two and a quarter diameters of an anterior central 
eye. Unca on tibial spur slender and strongly curved. Tibial spur 
minutely bifid at the apex. Bulb with two broad spines and a 
membranous process, the former separate at the base - . falcula, sp. n. 
2. Clypeus lower, scarcely two diameters of an anterior central eye. 
Unca on tibial spur long, very broad, compressed basally, shortly 
uncate at the apex. Tibial spur trifid. Bulb with a pair of stout 
sharp spines, coalescent at the base, curving outwards, and a 
membranous process . 
bulbosa, sp. 0. 
: . ss 8 8 ee. 6 Uncata, sp. un. 
** Abdomen with dorsal scutum. Bulb with a ies curving scimitar- 
shaped flat broad spine springing from the inner side at its apex, its 
point directed outwards, coinciding with the apex of an S-shaped 
membranous process. (Lower margin of fang-groove with 5 teeth.) . mucronata, sp. n 
F ) . . 
