394' DactylopimcE. 



On under surface of leaves of Mango (Pundaluoya and Bandarawella). 

 Received also from India, on Mango. 



The insects are congregated in large patches, sometimes completely cover- 

 ing the under side of the leaves. There is not much accumulation of loose 

 cottony matter, as the insect appears to be ovoviviparous and no ovisac is pro- 

 duced. The exuviae of the females and empty puparia of the males remain 

 attached to the leaves. The species is fortunately not very common, or it 

 would constitute a serious pest. But a bad case was observed at Bandarawella, 

 where a single Mango tree in front of the Rest House was so heavily infested 

 that not a single leaf had escaped attack and considerable defoliation had re- 

 sulted. The presence of the insect is rendered conspicuous by a copious 

 growth of black fungus which collects on the upper surface of the foliage. The 

 insect is preyed upon by the larvae of a small Coccinellid beetle. These larvns 

 themselves secrete white cottony tassels which make them almost indistinguish- 

 able from the Coccidae upon which they are feeding. 



Allied to Phen. ornatiis, from which it may be distinguished by the larger 

 number of marginal spiniferous patches, and by the spines being truncate. 



PHENACOCCUS SPINOSUS, Robinson. 

 (Plate CLXIV. 17.) 



Phenacoccus spinosus, Robinson, Phil. Journ. Sci., Vol. XIII. Sec. D, No. 4, 

 p. 145 (July 1918)- 



Adult female similar, in nearly every particular, to Phenacoccus fnangi/erce, 

 from which it may be distinguished by the presence of thirty-four (instead of 

 thirty) spiniferous marginal tracts. The claw {fig. 17) is stouter and blunter, 

 and has a very pronounced denticle on its inner edge. The spines are trun- 

 cate — as in mangiferce. 



On Ficus sp., Peradeniya : and on an undetermined plant, at Trincomali. 

 Received also from Java, on Psidium piimilinn. Originally described from the 

 Philippine Islands. 



The difference in the form of the claw, alone, would not justify the separation 

 of this species from ma7tgifera; j but the number of definite spiniferous tracts 

 would seem to constitute more than a varietal distinction. 



Genus ANTONINA, Sign. 



Antonina, Signoret, Ann. Soc. Ent. Fr. (5), Vol. V. p. 24 (1875). 

 ChcBtococcus, Maskell, N.Z. Trafts. Vol. XXX. p. 249 (1898). 



Signoret diagnoses his genus as follows : ' The species for which we have 

 created this genus is distinguished from other Cocci?ice by the absence of limbs 

 of which one can see no trace and by the shortness of the antennje which pre- 

 sent but a multiarticulate stump with some stiff hairs at the extremity. Its 

 form is elongate, cylindrical, three times longer than broad and somewhat 

 resembling the pupa of a fly ; the rostrum presents in the young stage a 



