Insects and Spiders Ji 



was used by 11,841 pupils of 449 classes from 185 institutions, 

 as compared with 6,667 pupils of 244 classes from 130 institu- 

 tions in 1914. Dr. Van Name has been most successful in 

 consolidating the general collections of invertebrates, giving 

 particular attention to the arthropods and urochordates. Inci- 

 dentally, duplicate series of Porto Rico collections have been 

 selected for the Porto Rican Government, and much work has 

 been done on the invertebrates of the Congo collection. 



In an earlier paragraph the major work with insects and spi- 

 ders has been described, and little needs to be added. The 

 exhibits in the Hall of Insects have been amplified 



Insects and s0 as to mcrease materially the educational value 

 spiders 



of the entire hall. The study collections have been 



used by numerous entomologists who have also contributed 

 their services for the improvement of the collections. Mr. 

 Mutchler's work with Coleoptera and Mr. Watson's with Lepi- 

 doptera have been particularly noteworthy, while Mr. Wunder 

 has continued to be invaluable as a laboratory assistant. On 

 account of the large size of the groups in question, and also 

 because of the variety and delicacy of the material, the princi- 

 pal problems are concerned with the installation and care of the 

 rapidly growing collections. 



While it is impracticable to enumerate all the valuable acces- 

 sions of the year, the following may be noted. Among the 

 general invertebrates are an extensive and important 

 collection of Bryozoa, embracing many types, pre- 

 sented by Professor Raymond C. Osburn of the Ohio State 

 University; the series of myriapods and arachnids given by 

 Mr. Howard J. Notman; models of trematode and cestode 

 parasites secured by Professor Dean in Japan; a collection of 

 invertebrates from Florida presented by Dr. W. G. Van Name, 

 and by purchase a series of well prepared marine invertebrates, 

 including a number of rare forms. The entomological acces- 

 sions are numerous, though for the most part of small series of 

 specimens. Among the larger and more important items are 

 the series of 243 Lepidoptera, including some very rare speci- 

 mens, given by Mr. B. Preston Clark; nearly a thousand speci- 



