144 ME. E. P. STEBBING ON THE 



Ayiogeissiis laiiJoUa, andi Terminalia tomentosa, hj the writer in 

 the Coimbatore Forests of the Madras Presidency. 



From the above notes it will be seen that the genus has 

 apparently a fairly general distribution throughout the Indian 

 EegioD, being, however, as yet unreported from Assam and 

 Burma. The boundaries may be roughly taken to be as follows : — 

 The Sutlej Valley at a point some 50-70 miles N.E. of Simla in 

 the North-West Himalayas for the northern, with Punduloyii 

 in Ceylon as the southern limit, whilst on the west we have 

 a species reported from Sind. Tlig eastern boundary is the most 

 vague. I have received specimens of J[f. Stebhingi from Philibhit, 

 and the mango variety of this scale is to found at Bareilly. 

 But since these insects were obtained, a Monopldehus has been 

 procured from Tirhoot and Dharbanga, and this must be looked 

 upon as tlie present eastern limit. I have myself little doubt, 

 however, tbat this limit will soon be passed as our knowledge of 

 the genus increases. 



Pabt II. — On the Life-History ofM.o\io^\i[eh\x% Stebbingi, Green 



(Indian Museum Notes, vol. viii. p. 100). 



(PI. 16. figs. 1-13 ; PI. 17. fig. 1 ; PI. 18.) 



After this brief summary of the information at present 

 available on the known species and distribution of the genua 

 MonopJilebus^ a more detailed consideration may be given to one 

 of the species, M. Stehhingi, with regard to its life-history, 

 portions of which the writer has had exceptional opportunities 

 of studying. 



Early in January 1901, whilst on tour in the Sal Forests of 

 tbe Siwaliks, soon after my arrival in Upper India, some minute 

 little yellow specks upon the underside of Sal-leaves were 

 pointed out to me by Mr. J. W. Oliver, Director of the Imperial 

 Forest School, Dehra Dun, as an insect, supposed to be an aphis 

 or scale, which later in the year appeared in great numbers *. 

 The yellow specks were the young larval forms of a Monopldehus, 

 subsequently named by Green M, Stelbingi. From that date 



* I found that this scale had been known for some years to Planters and 

 Forest ofBcers serving in the Dun, but no attempt had been made to study its 

 life-history. A few specimens of the immature female had apparently been 

 sent to the Indian Museum by Mr. R Gleadow in 1900, and he had been told 

 that they were immature forms of a Monophlebus, but much too small to do 

 anything with. This was the position of affairs in January 1901. 



