216 A NEW SCALE-INSECT AFFECTING SUGAR-CANE. 



A seta on the base of the median lobes latei'ally, one between 

 the halves of the 2nd and of the 3rd lobes, and one mesad of 

 each of the fourth and fifth groups of plates. 



Dorsal jtores in three longitudinal rows, the row immediately 

 laterad of the level of the circumgenital pores of some 7-9 pores, 

 and not reaching to the margin of the pygidium. A few, small, 

 ventral pores. Anus cii'cidar, situated at the level of the caudo- 

 lateral groups of circumgenital pores. 



Circmngenital pores in 5 compact groups. Pores numerous; 

 approximately 33 (49 and 52) (42 and 45). 



Hab. — New Guinea; on stems of Sugai'-cane. 



The specific name has reference to the size of the female scale. 



Xofe by E. Jarvis. — Whilst inspecting sugai'-cane procured 

 from New Guinea, [ noticed several sticks infested with a scale- 

 insect, and forwai'ded specimens of them to the Botanic Gardens, 

 Ceylon, foi- determination. The coccid was examined by the 

 late Dr. A. Rutherford, who referred it to, the genus Aulacasjns, 

 and, believing it to be a new species, named it A. major. In a 

 letter enclosing the description given above, Dr. Rutherford said : 

 — "I think there can be no doubt that the insect falls in the genus 

 Aulacasjns. It does not agree with any species known to me. 

 Perhaps it might be described under the genus Chionasjns, though 

 it would not fall into that genus as at present understood, 

 Froggatt, in his review of the Australian Coccidje (Agric. Gazette 

 N. 8. Wales) refers to two species only of Aulacasjns, viz., A. 

 pentayona Tai'g., and A. rosece Bouche. Yours is neither of these. 

 Quite possibly it is a new species. I append a technical descrip- 

 tion, which you are quite at liberty to publish." 



