192 



The Chinese species of Memhracid (mentioned later in a foot- 

 note) on the contrary always lays its eggs in very neat Imtches of 

 six to eight, and makes the sht laterally just beneath the bark of 

 rathei" large shoots and twigs of varions trees (cliiefiy Ficus^, thus 

 raising the bark in a very shght pronilnencc, on whicli the contonr 

 of the eggs can some times be disceriied. The eggs of this iiisect 

 hatch in fourteen days, the firsL moult occnrs in about four days, 

 the next three in about six days each, Ihe last moult in ten days; 

 from hatching to adult occupies about thii'ty-two days, and from 

 egg to adult forty-six. 



The ahmentary canal bas certain peculiarities both in Ihe 

 earliest nymphal instar and ailult which resemble those 

 described by varions authors as occarring in Psyllidœ (Packard, 



Textbook of Entomology, p. 320, 

 1903), Cicadidœ, Cercopidœ and 

 Coccidœ. The basai portion of 

 the œsopbagus joins the crop 

 on the right-hand side and some- 

 what poslerior to the snmmit, 

 instead of joining the crop ante- 

 riorly in the usual way. The 

 exterior basement - membrane 

 (^;n, Fig.2)and external muscles 

 of ihe anteri'Or end of the crop 

 aud base of the œsophagus (oe) 

 separate from the epithelial wall 

 Iheie of and enclose the twisted 

 kuot, formed by the ascending 

 ventricle {voi) and descending 

 siuall in lésine (s?), togetljer wilh 

 Ihe aiilerior poi'tion of tbe uri- 

 nary tubes (u). The chamber 

 thus formed by the basement- 

 membrane may — accepting the 

 theory of Berlese hereafter men- 

 tioned — be termed the filler- 

 chamber {fc). The ventricle is 

 rather long and of large diameter 

 and somewhat convolnted, and 

 from its junclion with the pos- 

 terior part of the crop (cr) bends sharply anleriorly and conti- 

 nues alongside the crop to the anterior end thereof, where it is 

 enlarged somewhat in diameter {ep). At its posterior end com- 

 mences the very long small intestine (si) and from the junction 



Fil 



