90: I eee a 
Hymenopterous insects are very numerous and many are undoubt- 
edly valuable in destroying lepidopterous larve. Thus far, however. 
only one Hymenopter (A ¢ta insularis Guer.) has been studied. ‘These 
ants are polymorphic leaf-cutters which construct large underground 
chambers and galleries. They are very destructive and cut great 
quantities of leaves which they carry into their galleries and use for 
cultivating fungus gardens. These galleries extend from 4 to 8 feet 
underground and frequently cover large areas. 
The Coccide are very numerous, but are well parasitized both by 
hymenopterous insects and by fungi. For this reason they are not 
of such great economic importance as in the United States. 
Coleopterous insects are very numerous and frequently very in- 
jurious in orange groves. The cotton boll weevil (Anthonomus 
grandis Boh.) 1s very abundant. 
Gail-producing insects are very abundant. At the present time 
the writer is inclined to consider the Phytoptus galls the most abun- 
dant. A Coecid gall was found on the twigs of the fig and the native 
anonas. 
SOME OBSERVATIONS ON THE COTTON BOLL WEEVIL. 
By E. DWIGHT SANDERSON, Durham, N. H. 
In the following paper the writer wishes to give but a brief sum- 
mary of the more important conclusions resulting from two years’ 
study of the cotton boll weevil and its relation to cotton production 
in Texas. 
Inasmuch as the most important means of control have to do with 
the hibernating weevils, and as the mortality of those hibernating 
and the time of their emergence in the spring is a most important 
factor in the injury during the subsequent season, we have given con- 
siderable attention to all phenomena connected with their hibernation. 
Messrs. Hunter and Hinds have stated that the weevils enter hiber- 
nation when the mean average temperature falls to between 55° and 
60° F. Our observations entirely corroborate this rule. By confining 
several hundred weevils in cages once a week after October 1 we 
ascertained that in 1903 none hibernated until about November 18, 
when there was a freeze; and about that time the mean average 
temperature dropped below 60°. Furthermore, those confined some 
time before this died before hibernating, almost without exception, 
showing that they can not be forced into hibernation; that the time of 
hibernating depends on the average temperature; and that by de- 
priving the weevils of all food early in the fall they can be starved 
to death in Jarge numbers, 
