I20 THE AMERICAN MUSEUM JOURNAL 



which flows by Utuado, and excursions were made to two neigh- 

 boring mountains, Morales and Mandios, for the purpose of 

 studying the fauna and flora in the dense primeval forests on 

 their summits. 



Pursuing its journey, the party arrived at Ponce on the 

 southern coast of the island on March 21. For the purpose of 

 collecting on the dry southern slope of the sierra an excursion 

 was made to Tallaboa and Pehuelas. A number of Cerion shells 

 were gathered near the former locality, which in its fauna and 

 its drought conditions offers a striking resemblance to certain 

 parts of the Bahamas. From Ponce the expedition returned 

 to San Juan along the old Spanish military road, with a stop 

 of parts of two days at Coamo Springs and frequent stops near 

 Aibonito and Caguas. After reaching San Juan, where it was 

 necessary to wait a few days for the steamer to New York, an 

 excursion was made to the peculiar limestone cliffs about Vega 

 Baja. 



Although only four weeks could be devoted to the work, a 

 large amount of botanical and zoological material was secured by 

 the expedition. Professor Britton and his botanical staff col- 

 lected 1456 numbers of land plants, averaging three or four 

 specimens to a number, and 231 collection numbers of marine 

 algce, more than 6000 specimens altogether. Professor Wheeler 

 secured an extensive collection of the ants of Culebra and 

 Porto Rico, regions from which no ants have been described 

 heretofore. This collection contains some 5000 specimens, repre- 

 senting about 60 species, subspecies and varieties. A new 

 fungus-growing ant of the genus Cyphomyomex was discovered 

 and the peculiar and hitherto unknown fungus-gardens of Myco- 

 cepurus smithi Forel were studied. A new wingless fly {Pulici- 

 phora horinqiienensis sp. nov.) was taken at Utuado, and a new 

 arachnid belonging to the remarkable group of the Tartarides 

 {Schizomus brittoni sp, nov.) was secured at Coamo Springs. 

 The series of myriopods, spiders and termites also comprises 

 several undescribed species. 



