18 PARASITES OF THE COTTON BOLL WEEVIL. 
+ 
The highest percentages obtained in each class are as follows: 
Tm ghadeon woodland 2) tse = as Fe ee cee ne eee eee ees Oe 8.7 
insu on woodlands a... sceu Sette: He eee oo ey ee oe ee eee 8.3 
Im-shadeofiplantea op prairie. 3... 22) 2s. shee ep i a 8.2 
[ns On praities:. 0. oes seen te ae ee en ee ea ee 10.1 
Should further inquiry prove that sun-dried squares are the most 
highly parasitized, another reason is presented for wide rows. 
GEOGRAPHICAL CONSIDERATIONS. 
By far the most important facts established by the table of per- 
centage of parasitism (Table IV) were elicited by using the geograph- 
ical map of Texas, published in the census of 1880, as a base. 
I. The alluvial prairie of the Rio Grande is represented by Browns- 
ville with an average percentage of parasitism in all forms of 6.1. 
II. The coast prairie is represented by Corpus Christi with 8.5 per 
cent, Goliad with 8.0 per cent, Cuero with 5.5 per cent, and Victoria 
with 3.7 per cent. 
III. The Edwards plateau is represented by Junction with 8.2 per 
cent, Roosevelt with 6.9 per cent, and 16 miles south of Roosevelt 
with 2.2 percent. This latter case was a farm with very rank growth 
of cotton, from which shaded squares were picked on the ground. 
The weevil had not been present long. 
IV. The black prairie is represented by Kerrville with 3.3 per cent, 
Taylor with 2.6 per cent, Corsicana (IVb) with 6.0 per cent, sal 
Dallas with 5.1 per cent. 
V. The cross timbers are represented by Waco with 11.4 per cent. 
VI. The eastern hardwoods are represented on the south by 
Beeville with 1.2 per cent, Hallettsville with 2.8 per cent, each at the 
tip of an extension of this region, and by Calvert with 2.1 per cent, 
Palestine 3.7 per cent, Mineola 2.0 pe cent, Overton 1.9 per cent, 
Marshall 8.0 per cent, Mansfield, La., 2.9 per cent, Many, La., 3.8 
per cent. Marshall is probably pore ented by a field on a red-land 
knoll, which would account for the discrepancy. 
VII. The eastern pine country is represented by Trinity with 2.4 
per cent, and Orange, La., with 0.9 per cent. ‘Trinity is in a transi- 
tional region of pines and hardwoods, but seems to belong more 
typically 1 to the hardwood region. 
It will be readily observed that regions I, II, III, V, with Corsicana 
in IVb, which really belongs to the brown oa region in the eastern 
hardwoods, and Marshall in VI, which belongs to che red-land areas 
of the eastern hardwoods, are the most highly parasitized, while the 
regions IV, VI, and VII are the lowest parasitized. 
The map on the opposite page (fig. 4) is presented to illustrate these 
statements. 
While it may be merely a coincidence that the places 1 in the same 
belt have about the same pr Speman of parasitism, it is nevertheless 
