1969] 
Ratnbla — Cave Harvestmen 
391 
Suborder Laniatores 
Family Phalangodidae 
Subfamily Phalangodinae 
The author has followed the classification of Goodnight and Good- 
night (1951, 1953), a modification of Roewer’s system, avoiding the 
numerous monotypic genera of Roewer by using a combination of 
generic characters, some of which proved to be variable. Thus the 
subfamily Stygnommatinae is ignored and all its members are united 
in one genus Stygnomma. The definition of Stygnomma is revised 
below to accommodate the new species. 
Stygnomma Roewer 1914 
Type species by monotypy S. fuhrmanni Roewer from Columbia. 
Phalangodids without a common eye tubercle; eyes present or not. 
Dorsal scute with five areas, boundaries of which are sometimes dif- 
ficult to discern. First area without a median line. Tarsi of third 
and fourth legs without scopulae, and with simple untoothed double 
claws. All tarsi have a varying number of articles. Distitarsus of 
first tarsus with two or three articles, of second with three or four. 
Metatarsi of legs divided or not into astragali and calcanea. Femur 
of first leg normal. Endite of second coxa without a ventral projec- 
tion. Secondary sexual characters of the male variable, usually ex- 
pressed as increased spination of the chelicera and palpus, and 
enlargement of some portion of metatarsus of third leg. 
We include the new species in the key made by Goodnight and 
Goodnight 1951. 
Key to species of Stygnomma 
1 a. Spiracle clearly visible, not concealed in any degree by the fourth 
coxa 2 
ib. Spiracle partly concealed by posterior expansion of the fourth 
coxa 3 
2a. Eyes widely separated, and one spine between them 
S. fuhrmanni 
2b. Without eyes and without such spine S. fiskei 
3a. Spine present between the eyes 4 
3b. Spine not present between the eyes 5 
4a. Eyes close together, lacking development of spines on the free 
tergites S. maya 
4b. Eyes widely separated, with some spinose development of tu- 
bercles of free tergites in the males S. spinifera 
5a. Fourth coxa with large spines visible from above .... S. spinulata 
