Occasional Papers of the Museum of Zoology 29 



ing. On the same log were collected three other species, Cre- 

 mastogaster cerasi, Tapinoma sessile, and Lasiiis americanus. 

 Five days later a small and isolated band of this species, 

 not exceeding fifty individuals, was found beneath a pine block 

 in the damp sand in the willow area on the east beach. On 

 the same day a very large colony was found in the same hab- 

 itat. The nest was in a much rotted pine log ten feet long and 

 eight inches in diameter. The whole log was so honeycombed 

 with passages that it could little more than maintain its shape. 

 It was ])artly buried in the damp sand and well shaded by the 

 willows. It was torn open and a great number of ants were im- 

 mediately exposed. Besides the polymorphic workers there were 

 many of the secretive males and females, all winged. A few 

 pupae were stored in warm dry chambers in the upper part of 

 the nest, but these were very few in number for so large a 

 colony. A little later a few isolated workers were discovered 

 under a log on the beach very near a nest of Lasins atnericanus. 

 These were the only records obtained. The form was appar- 

 ently uncommon, almost rare, and was restricted to the willow 

 and grass areas on the upper part of the beach. 



The results of the Mershon Expedition and additional work car- 

 ried on by the Michigan Geological and Biological Survey have been 

 partially summarized in the following papers : 



iTh'e Mershon Expedition to the Charity Islands, Lake Huron, by 



A. G. Ruthven, Science, N. S. XXIII, pp. 208-209. 

 Results of the Mershon Expedition to the Charity Islands, Lake 

 Huron. 

 Birds, by N. A. Wood. Wilson Bull., Jul}', 191 1, pp. 78-112. 

 Plants, by C. K. Dodge. 13th Ann. Rept. Mich. Acad. Sci., 191 1, 



pp. 173-190. 

 Mammals, by N. A. Wood. Ibid., pp. 131-134- 

 Preliminary Report on the Coleoptera, by A. W. Andrews. 



Ibid., pp. 168-170. 

 The Amphibians and Reptiles of Charity Island, by Crystal 

 Thompson and Helen Thompson. 14th Ann. Rept. Mich. Acad. 

 Sci., 1912, pp. 156-158. 

 The Breeding birds of Charity Island with Additional Notes on 

 the Migrants, by N. A. Wood. Ibid., pp. 178-188. 



