22 THE BUREAU OF SCIENCE 



in which capacity he continues the supervision of the mosquito 

 extermination project which was originally organized at the 

 instigation of this Bureau. A Filipino employee, to whom can 

 te entrusted the work of preparing and mounting insects for the 

 cabinets, was added to the staff in 1913. 



Routine work. — The work of this section has been to assist the 

 Bureaus of Agriculture, Health, Forestry, and others in sug- 

 gesting methods of exterminating such common pests as sugar 

 cane insects, locusts, mosquitoes, flies, and forest insects ; in 

 classifying injurious and other insects; and in working out life 

 histories and devising means of keeping insect pests in check. 

 Considerable time has been consumed in furnishing information 

 with reference to injurious insects and insecticides, and formulas 

 for the preparation of the latter have been suggested when such 

 were necessary. At present this work is largely suspended 

 owing to lack of personnel. 



Accessions. — During the last year and a half nearly 2,000 

 numbers have been added to the collection, which represent 

 several times that number of insects. The extension of the 

 collections is being continued through our trained assistants and 

 by gifts. 



Identification of material. — A number of entomologists have 

 served in the identification of material and in the preparation 

 of papers for publication, of which several have been published 

 and a few are now on hand. 



Silk. — The silk industry was introduced into the Philippine 

 Islands by the Bureau of Science. Silkworms have now been 

 grown for eight years and have never suffered from any disease. 

 Our work in the culture of silk is being continued, and we are 

 now raising our stock of about 10,000 silkworms each generation. 

 There have been a large number of inquiries with reference to 

 the industry and requests for silkworm eggs ; and the desirability 

 of extending the silk industry throughout the Philippine Islands 

 becomes more apparent each year. There are very few people 

 who have mulberry trees ready to feed the silkworms, and fewer 

 still who have the requisite training to care for the worms, so that 

 progress is slow. However, through the efforts of the Bureau of 

 Science silk culture is steadily increasing in the Islands. It was 

 introduced into one new province during August. 



There is a large amount of work that ought to be done to as- 

 certain the best races of silkworms that should be introduced 

 and crossed with our own in order to retain our own worms in 

 vigor and free from danger of disease. The need of a technically 



