TWELFTH ANNUAL REPORT g3 



a proposed publication on Philippine plant diseases, in which 

 he proposes to describe and discuss the different plant diseases 

 already known from the Philippines with, as far as possible, 

 nontechnical descriptions of the organisms causing the diseases, 

 the characters by which they may be recognized, and methods 

 of prevention and eradication. This work will be a basis for 

 the further study and investigation of vegetable pathology in 

 the Archipelago, a phase of botany that as yet has received 

 but little attention in the Philippines. 



Field luork. — As in the past, it has been our object to have 

 collections made, so far as possible, in regions not previously 

 botanically explored. One native collector is kept in the field 

 most of the time, while other members of the staff make trips 

 from time to time for the purpose of botanical observation and 

 the collection of material. The most extensive single collection 

 made during the year was by Mr. Merrill at Taj^tay, Palawan, 

 April 7 to June 7, 1913, of which no definite summary has been 

 included. The collection comprises about 1,100 numbers, rep- 

 resented by about 15,000 specimens. Collections approximat- 

 ing 1,000 numbers were made by Mr. R. C, McGregor in Nueva 

 Vizcaya Province and Ifugao subprovince. Extensive collections 

 also have been made in the Provinces of Laguna, Tayabas, Rizal, 

 and Bataan, Luzon, and in Leyte, Panay, Basilan, and Mindanao. 

 A total of 5,066 specimens, from the collections made by em- 

 ployees of the Bureau of Science, have been incorporated in the 

 herbarium. Miscellaneous collections made by employees of the 

 Bureau of Forestry, chiefly tree species, amount to 1,065 num- 

 bers; this material has mostly been received in small lots from 

 many provinces and islands. 



ENTOMOLOGICAL SECTION OF THE BIOLOGICAL LABORATORY 



Routine work. — Considerable time has been consumed in field 

 investigation and collection of injurious and other insects when 

 called upon either by private individuals or bureaus of the Gov- 

 ernment and in suggesting methods of combating such common 

 pests as mosquitoes and flies. The routine work further con- 

 sisted in mounting and accessioning of material and in arrang- 

 ing the same in the collection. The greater part of the collection 

 has been rearranged. 



Mr. Banks has spent considerable time in the supervision of 

 the mosquito-extermination project carried out by the Bureau of 

 Health, and has continued to give some instruction in the Uni- 

 versity. We are handicapped more than ever in the entomo- 



