DactylopiincB. 369 



TYLOCOCCUS SIMPLICIOR, nov. 

 (Plate CXLVIII.) 



Adult female coated above with rather dense white meal. Margin with a 

 close fringe of white tassels which tend to coalesce. Broadly oval; rather 

 strongly convex above. Margin of body, on each side, with a series of seven- 

 teen more or less prominent ceriferous tracts, which become rather broken 

 and diffuse at the cephalic extremity. Each tract bears a group of from five 

 to eight stout, sharply acuminate spines and many strong setae (see figs. 6, 7). 

 Antenna i^fig. 2) rather short, eight-jointed ; eighth as long as or longer than 

 the preceding two joints together; first joint basally constricted; fourth shortest. 

 A conspicuous eye spot is noticeable shortly beyotid the base of the antenna, on 

 each side (see fig. 6 b). Limbs robust but comparatively short {fig. 3) ; femur 

 and trochanter together longer than tibia, tarsus, and claw together ; tarsus 

 approximately two-thirds the length of tibia ; claw stout, falcate ; tarsal digitules 

 slender, simple ; ungual digitules, slender, slightly dilated at extremity. An- 

 terior glandular fovete rather small and inconspicuous ; posterior fovea; large 

 and well defined. Anal ring with six comparatively short setae. Anal lobes 

 (see_;f^. 7) rounded, prominent; the caudal setas stout, nearly three times the 

 length of those on the anal ring. Between the anal lobes is a pair of stout setas 

 equalling in size those of the anal ring. Derm with scattered minute circular 

 pores which are more concentrated on the marginal area and on the ceriferous 

 tracts (seeyffi'. 6, 7). Length 2 to 2*5 mm. 



On undetermined plant. Maha Illuppalama, N.C.P. Attended by ants 

 {CEcophylla sinaragditid). Clearly allied to T. fiormicarii, from which it differs 

 in the obsolescent marginal lobes, in the larger limbs, and in the smaller number 

 of spines on the ceriferous tracts. 



Genus PSEUDOCOCCUS, Wesiwood. 



PseudococcuSy Westw., Synop. Gen. Br. Ins., p. 118 (1839). 

 Dactylopms., Targ., Mem. Soc. Ent. Ital. (1867). 

 Boisduvallia, Sign.,yi««. Soc. Ent. Fr. (5), Vol. V. p. 338 (1875). 

 Oudablis, Sign., Bui. Soc. Ent Fr. (6), Vol. I, p. clvii. (1881). 



Westwood proposed this name to cover the * mealy bugs,' and specified 

 adonidum (now generally known as longispinus) as the type of the genus. 

 Signoret, in 1875, restricted the name to those species having nine-jointed 

 antennae and relegated the others (with eight or fewer joints) to the genus 

 Dactylopius, by which name they were generally recognised until the publica- 

 tion of Mrs. Fernald's Catalogue of the Coccidce of the World, in which many 

 sweeping changes in generic names were propounded. The name Dactylopius 

 having now been allotted to the ' Cochineal Insects,' Westwood's name takes 



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