20 ENTOMOLOGICAL SOCIETY 
Sympetrum semicinctum (Say). 
Kaslo, August 6 (i $), August 7 (i cT)- 
[Sympetrum costiferum (Uhler). 
Wellington, September 2 (Dyar : i $ ) .] 
[Sympetrum scoticum (Donovan). 
Banff, Alberta (N. B. Sanson: i teneral o n , i adult d\ i $).] 
Libellula quadrimaculata Linnaeus. 
Kaslo, May 29 (Dyar: i$), June 9 (i tf), J une IJ > Mirror 
Lake, 1,670 feet, and Fletcher's Ranch, 2,800 feet (21 dV, 5 $ 9 , 
2 pairs m coitu), June 14 (2 cTcT), June 16 (i $), June 18 (i cT, 
i $), July 2 (i tf). 
The concluding paper was by Mr. Banks, and entitled : 
ARACHNIDS FROM COCOS ISLAND. 
BY NATHAN BANKS. 
Cocos Island, situated in the Pacific Ocean some distance off 
the west coast of Mexico, has been rarely visited by naturalists. 
The only spider previously recorded from the island is Argy- 
roepeira nigriventris Keys., which was taken by the Hopkins- 
Stanford Galapagos Expedition. A few years ago Dr. Paul 
Biolley of San Jose, Costa Rica, visited the island, and several 
papers have been published on the results of his trip. The 
Arachnida were sent to me for examination, and although few 
containjone or two interesting things. The most important is 
a Phalangid representing a new genus. There were eight spe- 
cies in the collection, six spiders, and two Phalangids. The 
types are in the collection of the writer. 
ARANEIDA. 
Gasteracantha hexacantha Fabricius. 
Several specimens of the usual type. This is a widely dis- 
tributed species in the tropics. 
Gasteracantha biolleyi, new species. 
Cephalothorax black; legs and sternum black; abdomen yellow, with 
black spines and marks; a band connecting the larger lateral spines, an 
oblong spot near base of anterior spines, and a crescent each side in 
front; from the black band there is a mark extending to the posterior 
spines; all the sigillae are on these black marks. The venter is black, 
with many small yellowish spots. In shape it is much like G. cancriformis, 
