1969] 
Chickering — Oonopidae 
145 
genus Opopaea. It seems highly probable that diligent collecting in 
the habitats preferred by members of this family will yield additional 
genera and species not yet recorded in the state. 
Key to the known genera of Oonopidae in Florida 
1 a. Genera with dorsal abdominal scutum (Ischnothyreus, Opopaea, 
Triaeris 2 
ib. Genera without a dorsal abdominal scutum (dieter oonops, 
Oonops , Orchestina , Stenoonops) 4 
2a. Abdomen with dorsal and ventral scuta strongly chitinized and 
covering nearly the entire abdominal surface Opopaea , p. 
2b. Abdomen with scuta covering only a relatively small portion 
of the abdominal surface and not so strongly chitinized 
( Ischnothyreus , Triaeris) 3 
3a. ale nearly contiguous to one another; pme contiguous to one 
another and to ple; males with dark brown palps and a basal 
hook on the cheliceral fang Ischnothyreus, p. 
3b. ale fairly well separated ; pme contiguous but more or less well 
separated from ple Triaeris , p. 
4a. pme moved far forward between ale thus making an anterior 
row of four eyes Orchestina, p. 
4b. pme not moved forward as given above ; forming a somewhat 
recurved row with ple .... (IT eteroonops, Oonops, Stenoonops) 5 
5a. Legs without conspicuous spines; venter of abdomen with a 
moderately well outlined epigastric scutum and with a narrow 
ventral scutum just posterior to the genital groove 
Stenoonops, p. 
5b. Legs with more or less conspicuous spines; venter of abdomen 
with weakly outlined scuta (Oonops, Heteroonops) 6 
6a. Palpal patella with a conspicuous prolateral bulge bearing ro- 
bust spines; palpal femur and tibia also with conspicuous spines 
(Figs. 29-31) Heteroonops , p. 
6b. Palpal patella without notable distortion; palpal segments with- 
out conspicuous spines Oonops, p. 
Species with dorsal abdominal scutum 
Genus Ischnothyreus Simon, 1893 
Ischnothyreus peltifer (Simon) 
Ischnaspis peltifer Simon, 1891: 562. The female holotype from St. Vincent, 
B. W. I. is in the British Museum (Natural History), examined. 
Ischnothyreus peltifer Simon, 1893: 298; (not the male p. 299 fig. 264). 
Petrunkevitch, 1911: 127; 1928: 88 ; 1929: 66; Bryant, 1940: 266; 
Roewer, 1942: 287; Chickering, 1951: 219; 1968: 80; Bonnet, 1957: 2309. 
