NEW SPECIES OF GRAMMONOTA 
(ARANEAE, LINYPHIIDAE) FROM 
PANAMA AND COSTA RICA* 
By Arthur M. Chickering 
Museum of Comparative Zoology 
Numerous species of the genus Grammonota Emerton, 1882, have 
been recognized from North and Central America as far south as 
Costa Rica. Two species of this genus were reported from Costa 
Rica by Bishop and Crosby in 1932. Kraus (1955) did not report 
this genus from El Salvador, and it has not been reported from 
Panama as far as I have been able to determine. Many specimens 
belonging to this genus have appeared in my collections from Panama 
during the past forty years and the present seems to be a convenient 
time to put these on record. The frequency with which members of 
this genus have appeared in my collections from Panama indicates, 
I believe, the need for more careful collecting throughout the Neo- 
tropical region. 
Grants GB-1801 and GB-5013 from the National Science Founda- 
tion have furnished aid for several collecting trips in Central Amer- 
ica, the West Indies and Florida together with my continued research 
in the Museum of Comparative Zoology, Harvard University, for 
nearly five and one half years. As I have so frequently done in the 
past, I am again acknowledging the very gracious help and encour- 
agement received from members of the staff of the Museum of Com- 
parative Zoology extending over a period of many years. 
Genus Grammonota Emerton, 1882 
Grammonota tabuna sp. nov. 
Figures 1-10 
Holotype. The male holotype is from Gatun, Panama Canal 
Zone, January 30, 1958. The name of the species is an arbitrary 
combination of letters. 
Description. Total length 1.8 mm. Carapace about 0.92 mm long 
(overlapped by anterior border of abdomen) ; 0.77 mm wide opposite 
second coxae where it is widest; with an obscure longitudinal thoracic 
groove; cephalic region considerably raised and strongly modified 
by a pair of conspicuous lobes (Figs. 1-3) ; below each lobe is a 
* Published with the aid of a grant from the Museum of Comparative 
Zoology at Harvard College. 
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