42 Journal of the Asiatic Soc. of Bengal. [N.S., XIX, 1923.] 

ig Plate V. 
Fig. 9.—Salivary pum 
Fig. 104a.—Dorsal view of 6-10 abdominal segments. 
10b. aged view of 5-10 abdominal segments. 
10c.—8th a ses abdominal segments. 
10d. aden 
Fig. lia tandat ion of the 6-10 abdominal segments, Female. 
i s3 7-10 
'Ne.— 2? oe) 8-10 ”? o> or 
Plate VI. 
Fig. 12.—Alimentary ca 
12a.—Figure sho Dig the valve between the oe and the crop. 
Fig. 13.—Salivary glands and pump apparatus 
Fig. 14.—Male reproductive organs. 
Plate VII. 
Fig. 15.—Female te organs. 
Fig. 16.—Nervous s syste 
16a.— Lateral view of the central nervous mass. 
Plate VIII. 
Fig. 17a.—Entire Insect, right side of the diagram showi ing the dorsal tra- 
cheal system ; left side showing the ventral tracheal system 
176. — Division of a main trachea rising from an abdominal spiracle. 
Fig. 18.—Stink glands, 
Plate IX. 
Fig. 19.—Circulatory system. 
20a.—Egg. 
20e.—After fourth moult. 
Mr. Hem Singh carried out the greater a of this work in the 
sone yo Laboratory of the Government College, Lahore. It was com- 
enced in 1919 and the Prego Mic embodi Bae in a dissertation which 
was submitted for the M.Se. ree of the Punjab Brereton in 1920 
he was continued, wit Be ste shane As the Punjab Agri- 
pare g College, Lyallpur, where Mr. Hem Singh acta vadeubls help 
and criticism i: Mr. M. A. Hussain, Entomologist to ties re 
Punjab. In connexion otis this research Mr. Hem Singh has had hse 
paca whack also ate ending some months in the Laboratory of the Im- 
perial Entomologist at Pusa (Bihar).—Greorcre Matruat, Professor of 
sees Y, Peco ‘nment College, Lahore. 
em ee et cs ee es 





