12 INSECT ENEMIES OE THE BOLL WEE^HCL. 



galplius has since heen described as Urosigalphus anthonomi Crawford 

 (Cra^^ord, 1907a). 



In 1906 Mr. Nathan Banks described a mite, Tyroglyphus hreviceps, 

 collected at Victoria, Tex,, from boll-weevil larvae (Banks, 1906). 



In 1 907 the senior author of this bulletin added Hydnocera puhescens 

 LeConte as a predaceous enemy of the boll weevil (Pierce, 1907a, 1907b, 

 1907c). In the same year Dr. Hinds published two papers in which 

 the work of Solenopsis geminata Fab. (fig. 16, p. 70), variety xyloni 

 McCook, as a predator on the boll weevil was fully discussed, and 

 considerable statistical data on the parasitic control of the weevil 

 were presented (Hinds, 1907a, 1907b). Mr. Morgan published a 

 brief account of the predatory attack of a bug, Apiomerus spissipes 

 Sa.j (Morgan, 1907). Mr. J. C. Crawford described as parasites of 

 the boll weevil Torijmus anthonomi, Urosigalphus anthonomi, and 

 Urosigalphus schwarzi (Crawford, 1907a). 



In 1908 the senior author of this report recorded Catolaccus antho- 

 nomi Ashmead as a boll-weevil parasite and Cathartus cassix Reiche 

 (gemellatus Duval) as a predator (Pierce, 1908a, 1908b, 1908c, 1908d). 

 Mr. Crawford described Cerambycohius cushmani and Catolaccus 

 hunteri as new parasites of the boll weevil (Crawford, 1908). During 

 the same j^ear two new predaceous enemies of the boll weevil were 

 recorded from Louisiana, namely, Evarthrus sodalis LeConte and 

 Evarthrus sp. (Newell and Trehearne, 1908). Mr. Townsend, in a 

 paper on the muscoidean flies, recorded Ennyomma glohosa Townsend 

 as a parasite of the boll weevil (Townsend, 1908). During 1909 Mr. 

 Crawford described Tetrastichus hunteri as a parasite of the boll weevil 

 (Crawford, 1909b). 



SCOPE OF PRESENT REPORT. 



The present report is supplementary to a former bulletin which 

 was based on investigations prior to 1907 (Pierce, 1908a). The 

 matter contained herein has mainly been gathered during the years 

 1907, 1908, and 1909. Only such notes as are of value for the sake of 

 comparison have been repeated from the previous report. 



The work is divided into three parts: 



I. The status of the cotton boll weevil and its enemies. 



II. The biological complex. 



III. The economic application. 



PART I. THE STATUS OF THE COTTON BOLL WEEVIL AND ITS 



ENEMIES. 



Part I of this bulletin shows the large mass of statistical material 

 gathered during the four years of the parasite investigation, and 

 attempts to place this material in such form as to show its economic 

 value and significance. 



