MUSEUM OF COMPARATIVE ZOOLOGY. 15 



REPORT ON THE MYRIOPODS, ARACHNIDS, AND 



WORMS. 



By Ralph V. Chamberlin. 



During August, the Curator engaged in field-work in Utah. 



In continuing the study of spiders from the western United 

 States and from Louisiana and Texas, a revision of the Gnaphosi- 

 dae, as represented in North America, was prepared and a synopsis 

 sent to press. The genus Mimetus was revised. In conjunction 

 with these studies, particular thanks are due to Profs. W. M. 

 Barrows, C. R. Crosby, and Mr. S. C. Bishop, for loans and gifts. 

 Additional material from Louisiana was received from Mr. H. E. 

 Hubert, and the new forms found in this and several other col- 

 lections from the South were described and included in a paper on 

 New North American and Chinese spiders. A short time was 

 given to work on the Aviculariidae. 



Prof. C. F. Baker made substantial additions to the collection 

 of Philippine arachnids previously sent for identification. An 

 important accession to the collection of myriopods includes, in 

 addition to a series of 247 species, the types of 162 species described 

 by Dr. Graf Carl Attems; of these types 145 are diplopods, and 

 17 chilopods. Important additions were received by exchanges 

 with Dr. H. Brolemann, and with Capt. Gilbert Archey who sent 

 paratypes of most of the chilopods described by him. A report 

 was made upon the myriopods secured by the expedition of the 

 California Academy of Sciences to the islands of the Gulf of Cali- 

 fornia. Some further study was made of the North American 

 Julidae, and a beginning was made in work upon the diplopods of 

 Mexico. Minor collections were received for identification from 

 the American Museum of Natural History, the U. S. Biological 

 Survey, the Illinois Horticultural Board, and the U. S. Bureau of 

 Entomology. 



