OF WASHINGTON, VOLUME XIII, 1911. 61 



tonwood (Populus deltoides), hackberry (Celtis), pecan (Hicoria 

 pecan), locust (Gleditsia triacanthos), and mulberry (Morus) 

 trees. In October and November, 1907, while collecting boll 

 weevils for hibernation, large numbers of this weevil were found 

 in cotton fields near Victoria. They were in the cotton (Gos- 

 sypium) squares and often associated with the boll weevil. In 

 1860 on the plantation in Lavaca County, Texas, we built a 

 crib 8 feet in the ground, walled up with rock, and 8 feet above 

 ground of logs. When this crib was opened in the spring, it 

 was found that the weevil had severely injured the corn (Zea 

 mays) above the ground, while that which was below the sur- 

 face was entirely free of weevil. In 1859, Mr. B. Q. Ward, of 

 Jackson County, piled 100 bushels of corn on the ground, cov- 

 ered it with hay, then put 1 foot of earth over all, heaping it to 

 a point for drainage. When opened in the spring not a sound 

 grain was to be found. In the winter of 1895, when the tempera- 

 ture went to 10 degrees above zero, and again in 1899, when it 

 went to 6 degrees above zero, all the weevils in my barn at 

 Victoria were killed. The corn was in the second story of a 

 wooden building. As a rule weevils get into corn in the field 

 before it is gathered. Mild winters and wet summers are con- 

 ducive to the increase of the weevil, while cold winters and dry 

 summers hinder it. Have seen corn gathered in September and 

 October so heavily infested that by January it was unfit to feed 

 to stock. It is seldom that corn can be kept in cribs in southern 

 Texas later than May on account of the damage of weevils 

 (Mitchell). Bred from stems of Ambrosia trifida March 24, 

 1909 (Mitchell). 



COSSONIN^E. 



Parahornia quercicola Horn. 



Found in large numbers in decayed willow (Salix) log, on 

 bank of Guadalupe River near town, February 12, 1910. They 

 were in cells, tunnels, and chambers made by large wood beetles; 

 some had just matured. They did not leave the log until after 

 March 2 (Mitchell),. 



Pseudopentarthrum robustum Casey. 



In cell of dead limb of mulberry (Morus), March 3, 1910 (Mit- 

 chell). 



IPID.E. 



Ips pini Say. 



At trap lantern in cotton field, October 1, 1897 (Mitchell). 

 (Undoubtedly carried in by the railroads.) 



Hypothenemus, new species, Hopkins. 



In old corn (Zea mays) stalks, March 6, 1909 (Mitchell). 



