200 



testes and ovaries and the mesodermic portions of their ducts. The 

 testes, however, remain as a pair of large spindle-shaped organs, 

 whilst the ovaries each becomes differentiated into eight ovarian 

 tubes. 



At an early stage the embryo of this Membracid, though no 

 appendages are visible, has the head and thoracic segments 

 plainly differentiated, whilst the abdominal région is as yet unseg- 

 mented(y, Fig. 13). At a later stage, when the head and thoracic 

 appendages bave appeared, eleven distinct abdominal segments can 

 be counted {z, Fig. 13). 



EXPLAN ATION OF FIGURES 



Fig. 1. Nymph after fourth moult. Above, the dorsal spiues of newly hatched 

 nymph. Beneath, same of later instars. 



Fig. 2. Alimeutary canal of adult. The lined portion of œsophagus and crop 

 indicates extent of fîlter-chamber. A', longitudinal section through 

 autei'ior part of recium. B', transverse section of same. a, b, c, d, e, 

 transverse sections through alimentai'y canal and fllter-chamber, 

 "a" beiug the most auterior and "e" most postei'ior section. 



Fig. 3. Longitudinal horizontal section through end of abdomen of nymph, 

 the parts retracted. 



Fig. 4. The same, parts extended. 



Fig. 5. Longitudinal vertical section through end of abdomen of adult 

 female, parts reti'acted. 



Fig. 6. The same, parts extended. 



Fig. 7. Ventral views of anterior end of niuth segment of maie nymph. 

 "a", of second instar; "è", of third instar; 'V, of fourth instar; 

 "d", of fifth instar. 



Fig. 8. Transverse sections through anterior end of uinth segment of maie 

 nymph of fifth instar. 'V(", most posterior, '°^'-, most anterio 

 section. 



Fig. 9. Longitudinal vertical section through end of abdomen of adult maler 

 Beneatli, enlargement of peuis. 



Fig. 10. "a", ventral view of eighth and ninth segments of female of second 

 instar. "6", longitudinal section through eighth and uinth seg- 

 ments of female of fourth instar, "c", ventral vie\y of ditto. 



Fig. 11. Ventral and latéral views of abdomen of female. 



Fig. 12. Trausvei*se section about mid-length of adult ovipositor, 



Fig. 13. Transverse sections through anterior end of niuth segment of female 

 nymph of fifth instar. 'V, most posterior; "rf", most anterior 

 section. 



(Ail figures are much enlarged.) 



I to XI, abdominal segments. 



an, anus. 



bm, basement-membrane. 



cr, crop. 



ejd, ejaculatory duct. 



