388. DactylopiincB. 



PSEUDOCOCCUS DEBREGEASI^, sp. nov. 

 (Plate CLIX.) 



Adult female oblong ovate ; convex above. Dorsum closely covered with 

 greyish or white meal, sometimes ochreous — in dried examples. A marginal 

 fringe of thirty-four short white tassels, slightly longer on the posterior segments. 

 Antenna {fig. i) eight-jointed, hairy ; a stout curved spine on side of terminal 

 joint, and a similar spine near distal end of seventh joint ; eighth joint consider- 

 ably longer than any of the others ; third next longest, closely followed (occa- 

 sionally equalled) by second ; fourth to seventh shortest, subequal. Limbs 

 {fig. 2), long and robust ; tarsus of anterior leg half, or slightly more than half 

 the length of tibia ; tarsus of mid and posterior legs less than half the length of 

 the tibia. Claw {fig. 3), stout and falcate ; digitules slender, the unguals 

 slightly dilated at extremity, the tarsals minutely knobbed. Ceriferous tracts in 

 a series of seventeen on each side ; each tract with two or more stout spines and 

 some longish stout setae. The spines on the anterior seven or eight tracts are 

 more numerous and are drawn out at the apex, assuming the appearance of 

 unusually stout setae {see fig. 6). On the abdominal segments the spines are of 

 the normal form, and are seldom more than two in number. Towards the 

 posterior extremity {see fig. 7) the setae on the ceriferous tracts are longer and 

 more numerous, attaining their maximum size and number on the anal lobes, 

 where they form a rather dense tuft amongst which it is difficult to isolate with 

 certainty any specialised caudal setae. Anal ring large, bearing six very stout 

 setce which are markedly larger than any of those on the anal lobes. Derm with 

 numerous minute scattered pores and many comparatively long setae. The 

 anterior and posterior glandular foveae are small and inconspicuous. Length 

 averaging 3 mm., ranging from 2 to 3*25 mm. 



On Debregeasia vehttina ; in shelters constructed by the ant Creinastogaster 

 dohrni. Pundaluoya ; Peradeniya. 



Characterised by the unusually numerous and long setae on the anal lobes. 



Genus PHENACOCCUS, Cockerell. 



Pseudococcus, Sign, (non Westw.), Ami. Soc. Ent. Fr. (5), Vol. V. p. 328, 1875. 

 Phenacoccus, Ckll., Ent. New.';, Vol. IV. p. 318, 1893. 



Signoret erroneously adopted Westwood's genus, to contain those ' mealy 

 bugs ' that have nine-jointed antenna ; whereas the type of Westwood's Pseudo- 

 coccus is longispinus — a species with eight-jointed antennae. Cockerell 

 accordingly erected the genus Phenacoccus to replace Signoret's (not West- 

 wood's) Pseudococcus. 



With the exception of this difference in the antennae, there is no character 



