LETTER OF TRANSMITTAL 



U. S. Department of Agriculture, 



Bureau of Entomology, 



Washington^ D. 61, Septeinher 19, 1906. 



Sir: I have the honor to submit a manuscript entitled "Notes on 



the Biology of Certain Weevils Related to the Cotton Boll Weevil," 



prepared by Mr. W. Dwight Pierce, special field agent in this Bureau. 



A number of weevils more or less closeh^ related to the boll weevil 



occur in the United States and there seems a possibility that from 



some of them parasites may be obtained which may be induced to 



transfei' their attacks to that destructive pest. The present paper 



gives some results of investigations carried on during the year 1905, 



and I recommend its publication as Part II of Bulletin No. 63 of the 



Bureau of Entomology. 



Respectfully, F. H. Chittenden, 



Acting Chief of Bureau. 

 Hon. James Wilson, 



Secretary of Agriculture. 



CONTENTS. 



rage 



Introduction 39 



Aut.Jionomus disjunctus Lee 41 



Anthonomus fulvus Lee - 41 



Anthonomus squamosus Lee - 42 



Lixus musculus Say 43 



Orthoris crotchii Lee 44 



ILLUSTRATIONS 



Page. 

 Plate I. Work of Lixus musculus and Orthoris crotchii. Fig. 1. — Gall of Lixus 

 musculus and exit hole of adult on stem of Polygonum pennsylvanicum. Fig. 

 2. — Gall of Lixus musculus and entrance hole (closed) of pyralid caterpillar 

 on stem of Polygonum. Fig. 3.— Pod of Mentzelia nuda showing two egg 

 punctures of Orthoris crotchii. Fig. 4. — Pod of Mentzelia opened, showing 

 a cluster of Orthoris crotchii cells, and the cocoons of Tetrastichus. Figs. 

 5, 6. — Interior of pod of the same, showing several cells of Orthoris crotchii. 

 Fig. 7. — An isolated cell of Orthoris crotchii, showing the manner in which 

 the seeds are eaten 42 



II 



