ii4 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



on segment I, 2-4 on segments II to VII, and always 1 on segment VIII. Pleural setae 2-3 

 on segment I, 3-5 on segments II to VII, and always 3 on segment VIII, including one slightly 

 longer seta. Ventral setae 1-2 on segment II, 2-3 on segments III to VII, and absent on 

 segment VIII. Abdominal disc pores on each side : Pleural pores 2-4 on segment I and 1-3 

 on segments II to VII. One ventral pore usually also present on segments III to VII, but 

 sometimes two occur on segments IV and VI, and sometimes the pores are absent on segment 

 VII. 



Glandular pouch well developed ; glandular pouch setae include a pair of 244-300 (268) \j. 

 long tail setae, and one, about 70^ long seta, i.e. the ratio length of the tail setae to the total 

 length of the body 1 : 4-2-5-2 (4-6). 



Genital segment small ; subtriangular in dorsal view ; style curving upwards in lateral view. 

 Penial sheath 101-119 {ioj)y. long and 64-76 (70)^1 wide (ratio 1-5-1-6, av. 1-52 : 1, and the 

 ratio its length to the total body length 1 : 11-1-12-3, av - n - 6). Basal ridge of penial sheath 

 its projection and the process of penial sheath well developed. Aedeagus tapering posteriorly 

 towards a pointed tip. Setae of genital segment on each side : Dorsally 3 setae always present 

 near the base of the style ; ventrally, 4-7 (5-4) setae occur on the penial sheath, and 3-4 (3-6) 

 setal sensilla on its process. 



Material : 10 specimens examined, collected by G. M. Das, in Cinnamara, Assam, 

 India, during October, 1961 ; host plant not stated. 



Nipaecoccus nipae (Maskell) 

 (Text-figs. 13, 14) 



Macropterous forms only known. A narrow and slender species ; comparatively very 

 small, with moderately long antennae and legs. When mounted 840-980 (896) pi long, 210-224 

 (214) (x wide and 1974-2240 (2086) \l wing expanse. 



Body setae and pores : Fleshy and hair-like setae rather difficult to separate ; those occurring 

 on the antennae about 31U. long and those on the legs slightly shorter ; the body itself only 

 with hair-like setae, about i8(x long. Disc pores present on the head, thorax and abdomen ; 

 these about 6fj. in diameter, usually with 5 or 6, and occasionally 4 peripheral loculi. 



Head : Subtetrahedron ; subtriangular in dorsal and front views ; ventral preocular 

 depression hardly indicated in lateral view. Length from apex to postoccipital ridge 85-98 

 (92)^ ; from apex to neck 128-143 (137) (i ; width across the genae 162-177 (171) [i. Dorsal 

 arm of midcranial ridge distinct, anteriorly separated from the other arms and posteriorly 

 meeting the postoccipital ridge. Lateral and ventral arms forming a T-shaped ridge. Post- 

 occipital ridge weakly developed and anteriorly confluent with the preocular ridges. Dorso- 

 medial part of epicranium slightly raised. Preocular + interocular ridges joining postocular 

 ridge below the ocellus ; ventral rudiment of preocular ridge absent. Eyes : Dorsal eyes not 

 projecting beyond the outer margins of the head in dorsal view ; 18-21 (19) u. in diameter and 

 separated by 79-89 (85) jx, i.e. 4-1-4-8 (4-6) times as much as their diameter apart. Ventral 

 eyes 24-27 (26) \l in diameter and 18-21 (20) \l apart. Lateral ocelli well developed. Ocular 

 sclerites weakly sclerotized. Cranial apophysis apically truncate. Tentorial bridge slender. 

 Dorsal head setae 8-10 (8-8) on each side of the median line ; each gena always with 2 genal 

 setae. Ventral head setae on each side : 4-5 (4-1) between the ventral eyes ; 9-13 (io-i) 

 forming on both sides a transverse band in the area of the ventral preocular depression ; 2-3 

 (2-3) in a row on each side of the ventral arm of the midcranial ridge. The head also with 

 1-2 (1-3) dorsal pores on each side near the antennal base. 



Antennae : Filiform ; 10-segmented ; 479-540 (509) (x long, i.e. somewhat longer than half 



