122 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Abdomen : 334-494 (403) pi long and 236-312 (281) pi wide. Tergites of segments I and II 

 small ; those of segments VIII and IX + X large. Sternites of segment VIII weak. Ostioles 

 well developed, 37-46 (40)10. long at orifice. Abdominal setae on each side : Dorsal setae 2-3 

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

 4-6 on segments II to VII, and 3-4 on segment VIII, including one slightly longer seta. 

 Ventral setae 1-2 on segment II, 2-3 on segments III to VII, and 0-1 on segment VIII. 

 Abdominal disc pores : Pleural pores 2-4 (2-8), 0-1 (0-2), 0-1 (o-i), and 0-1 (o-i) on segments 

 I to VI respectively, and absent on segments VII and VIII. One ventral pore occurs at least 

 on one side of segments III to VII, forming together a longitudinal sublateral row on each side. 



Glandular pouch well developed ; setae of glandular pouch include a pair of 229-296 (265) pi 

 long tail setae and one, 52-82 (61) pi long seta, i.e the ratio length of the tail setae to the total 

 length of the body 1 : 4-0-4-9 (4-5). 



Genital segment moderately large ; subtriangular in dorsal view ; style more or less straight 

 and apically rounded in lateral view. Penial sheath 140-180 (162) pi long and 67-89 (82) pi 

 wide, the ratio being 1-8-2-4 ( 2 '°) : x > an d tne ratio its length to the total body length 1 : 7-1- 

 8-4 (7-6). Basal ridge of penial sheath with a small projection. Process of penial sheath vestigial 

 and hardly indicated. Aedeagus comparatively long, anteriorly bent to reach the cavity of 

 abdominal segment VII. Setae of genital segment : Dorsally, 3 setae always occur on each 

 side near the base of the style ; ventrally 4-6 (5-1) setae present on each side of the penial 

 sheath, and 3-4 (3-8) setal sensilla on its vestigial process. 



Material : 10 specimens examined, collected by myself, on Psidium guava, in 

 Fayoum, Egypt, U.A.R., during the second week of August, 1964 ; females were 

 identified by A. I. Ezz and confirmed by Y. M. Ezzat. 



FERRISIANA Takahashi, 1929 



Ferrisiana virgata (Cockerell) 



(Text-figs. 17, 18) 



Macropterous forms only known ; comparatively long and slender, with moderately long 

 antennae and long legs. When mounted, total body length 1274-1596 (1386) pi, width at 

 mesothorax 294-364 (322) pi, and wing expanse 2296-2576 (2422) pi. 



Body setae and pores : Antennae and legs with numerous fleshy and very few hair-like setae, 

 about 55 pi long ; the body itself with only hair-like setae, about 28 pi long. Quadrilocular and 

 occasionally trilocular or quinquelocular disc pores, about 6pi in diameter, occur on the thorax 

 and abdomen. 



Head : Irregularly tetrahedron ; subtriangular in dorsal and front views ; ventral preocular 

 depression well pronounced in lateral view. Length from apex to postoccipital ridge 1 13-137 

 (i25)pi ; from apex to neck 174-204 (i86)pi ; width across genae 204-253 (22o)pi. Dorsal 

 arm of midcranial ridge only indicated by a median longitudinal heavy sclerotization. Lateral 

 and ventral arms forming together a Y-shaped ridge. Postoccipital ridge anteriorly confluent 

 with the preocular ridges. Preocular -\- interocular ridge join the postocular ridge below the 

 ocellus ; ventral rudiment of the preocular ridge weakly indicated. Eyes : Dorsal simple 

 eyes not projecting beyond the outer margins of the head in dorsal view ; their cornea 24-28 

 (26)pi in diameter and separated by 98-110 (i04)pi, i.e. 3-6-4-5 (4-2) times their diameter apart. 

 Ventral simple eyes 28-31 (29) pi in diameter and 25-31 (28) pi apart. Lateral ocelli well 

 developed. Cranial apophysis apically truncate. Tentorial bridge slender. Dorsal head 

 setae 11-14 (12-5) on each side of the median line ; each gena with 3-4 (3-3) genal setae. Ventral 

 head setae on each side : 2-4 (3-2) between the ventral eyes ; 5-8 (6-7) forming with their 



