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,
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