INSTITUTE, PUSA, FOR 1917-18 101 



Further observations were made in June, 1918, in Sylhet, 

 where isolated mango trees growing wild in the jungle as 

 well as those cultivated in rather isolated portions and 

 having hardly any epiphytes growing on them were found 

 to be equally infected. In confinement at Pusa the adult 

 weevils did not live beyond September, but it seems likely 

 that in Bengal and Assam it may pass the winter as an 

 adult. This pest requires close observation for a full year 

 under field conditions to enable remedial measures to be 

 suggested. 



(13) The Longicorn borer (? Oberea sp.) in stems of 

 Phaseolvs aconitifolius, mentioned in last year's Report, 

 has been observed to rest for two years in the larval state. 



(14) Odontotermes assmuthi. Colonies were again 

 established in tile nests from eggs laid by winged imagines, 

 but we have been unable to carry them on beyond October, 

 by which time the first-hatched eggs have become adult 

 soldiers and workers. 



(15) Microtermes obesi. After several failures in 

 former years, colonies have this year been established in 

 artificial nests. Eggs have been obtained from winged 

 imagines and are hatching out at the time of writing this 

 Report. 



(16) The following insects have been observed to have 

 only one generation in the year, viz., Anomala bengalensis, 

 A. biharensis, Adoretus caliginosus, Cryptocephalus sex- 

 signatus, an unidentified Lamiad borer in Saccharum sp., 

 and three unidentified lepidopterous borers in Saccharum 

 spp. 



(17) Cosmopteryx phceogastra. This was referred to 

 in last year's Report under the name C. manipularis, but 

 has since been differentiated and described by Mr. Meyrick 

 in the Entomologists' Monthly Magazine. Larvae mining 

 bean leaves were collected in November, 1916, and were 

 apparently resting at that time ; they continued to rest and 

 emerged in July, 1917. 



(18) Stictaspis ceratitina. The maggots of this Fruit- 

 fly were found in large numbers in July and August in new 



