73 
Ischaemum pilosum appears to have some economic importance, 
since Watt* states that it is “considered a good fodder grass in 
the Nimar district.” The gall-insect probably does no great 
amount of damage, as Mr. T es writes that the galls are not 
found on plants growing in porous soils, and that, where the galls 
occur, they are somewhat pemely distributed. 
EXPLANATION OF PLATE. 
All the figures are of Ischaemum pilosum. 
Fig. 1.—External view of mature gall showing sheathing pis 
eaves at the base and the pupal skin of the 
insect (7.) atiokang out of a hole near the ae of the 
gall. Nat. size. 
Fig. 2. —Longitudinal mere: of the same ee ahowike the 
extent of the cavity (c.). Nat. s 
Fig. 3.—Branch bearing two Mali Aas choned. ‘eae ee a young 
gall enclosed in the leaf-bases. Nat. siz 
Fig. 4.—The same after the removal of the leaves. Pe L size. 
Fig. 5.—The same gall cut longitudinally and enlarged, showing 
the larva (7.) in the cavity. 
Fig. 6.—Gall sonenns skin of gall-insect with parasites. The 
of the skin is shown at s. Nat. size. : 
Fig. 6a.— per "pat of same gall seen from fe left side to 
w the three small holes. ; 
Fig. 7. Pte: gall covered by its sheathing foavan p. puncture 
n upper leaf. Nat. size. 
Fig. 8.—The same after removal of the leaves; h. group of 
hairs; 7. skin of gall-insect containing parasitic 
larvae ; at db. the tissues of an gall are mature, at a. 
hey are meristematic. Nat. 
Fig. 9.—Transverse section of iid ecdtuant ‘from the apex of a 
mature gall. x 30. 
Fig. 10.—Transverse section of a mature gall near the middle of 
its length, x 
Fig. 11.—Transverse section of normal internode. x on 
Fig. 12.—Portion of transverse section of a gall. 
Fig. 13. eee section of vascular bundle ts normal 
ode. 
Fig. 1d, Peeaarecle section of vascular bundle of gall, x 305, 
x 
On 
XIII.—DECADES KEWENSES 
Pirantakum Novarum in Herpario Horti Reel 
ONSERVATARUM. 
DECAS LVI. 
numero diftert. 
* Watt, Dict. Econ. Prod. India. 
