'72 REPORT OF THE AGRICULTURAL RESEARCH INSTITUTE 



Diacrisia obliqua, of which the last two are hairy and the 

 others smooth-skinned. The flies were found to oviposit on 

 all the varieties of caterpillars, whether hairy or smooth, 

 but could not breed in other caterpillars so successfully as 

 they could in the silkworms. Flies were actually bred out 

 only from the parasitized larvse of Cosmophila sabulifera 

 but from the experiments it appeared that the flies could, 

 if necessary, breed in the other caterpillars. 



VI. Illustrations. 



Coloured plates illustrating the life-histories of the 

 following insects were prepared during the year, viz. : — 

 Pachydiplosis oryzce,* Papua depressella, Phyllocnistis 

 citrella, Chloridea assulta* Kolla mimica, Oedematopoda 

 clerodendronella, Epicephala chalybacma, Terias hecabe* 

 of which those marked * are now in press and will be 

 available shortly. 



A coloured plate of orange fruits was also prepared for 

 the Agricultural Officer, North- West Frontier Province. 

 Besides the completed coloured plates, a large number of 

 figures, in colour and line, was drawn of various insects and 

 these will be utilized for publications in due course. 



There is always a heavy pressure of work to be done by 

 the Artist Staff and our life-history work is constantly 

 handicapped by insufficient artistic assistance. 



A list of all the coloured plates of Indian insects, pre- 

 pared to date, was issued during the year, mainly for the 

 information of Provincial Entomological Staffs. This list 

 shows for each insect whether the coloured plate has been 

 printed and, if published, in what publications it has ap- 

 peared. 



The issue of coloured plates and lantern slides has been 

 continued. 



VII. Miscellaneous. 



Correspondence. A total of 95 parcels of specimens, 

 mostly of crop-pests, was received during the year for 

 identification and advice, whilst 1,090 letters were received 



