TWO NEW SPECIES OF THE GENUS OTIOTHOPS 
(ARANEAE, PALPIMANIDAE) 
FROM THE VIRGIN ISLANDS* 
By Arthur M. Chickering 
Museum of Comparative Zoology 
Otiothops walckenaeri MaeLeay, 1839, was established on the basis 
of a female from Cuba. Miss Bryant recognized the male and very 
briefly described it in 1940. O. oblongus Simon, 1891 was described 
from a female taken on St. Vincent, B. W. I. The male remains 
unknown. I failed to collect any members of this family during 
my visit to this island in October 1966. O. lutzi Petrunkevitch, 
1929, was also described from a female taken on Puerto Rico. The 
male has never been reported. I was again disappointed in not finding 
any members of this family during my period of collecting in Puerto 
Rico in January and February 1964. While collecting in Trinidad, 
W. I. in 1964 I found both sexes of a new species described as O. 
carpenteri Chickering, 1966. While collecting in the American and 
British Virgin Islands in July and August, 1966, I found specimens 
which seem to represent two additional species belonging to this very 
interesting genus. These are described in the following pages of 
this brief paper. As the matter now stands, six species of the genus 
Otiothops are now known from the West Indies. Two of these are 
known from both sexes, three are known only from females and the 
remaining species is known only from males. I think it safe to pre- 
dict, however, that diligent searching in this region will yield sev- 
eral additional species. 
Grant No. GB-5013 from the National Science Foundation made 
it possible for me to spend nearly four months collecting on nine 
West Indian islands in 1966 and is now helping me to continue my 
studies in the Museum of Comparative Zoology. 
Types and all other specimens relating to the species described in 
this paper will be deposited in the Museum of Comparative Zoology, 
Harvard University. 
Otiothops casobus sp. nov. 
Figures 1-4 
The name of the species is an arbitrary combination of letters. 
Female holotype. Total length 6.08 mm. Carapace 2.73 mm 
* Manuscript received by the editor March 17, 1967 
203 
