IM.lSTRATKl.XS. 



I'LATKS. 



raif«'. 



Platk I. Stages of Mexican cotton l)oll weevil. V'u^. 1. — Adult weevil, dc.rsal 

 view. Fig. 2. — Adult weevil, side view. Fig. :i.— Full-grown 

 larva, side view. Fig. 4. — Egg. Fig. 5. — Pupa, ventral view. 



Fig. (). — Adult with wings spread l-'ronl isj)iece. 



II. Stages and characteristics of Solenopsis geminata. Fig. 1.— Adult, 

 small worker form. Fig. 2. — Sting of worker. Fig. 3. — Right 

 antenna of worker. Fig. 4. — Adult workers, various sizes from 

 workers minor to workers major. Fig. 5. — Larva? and pupa? of 

 small forms of worker. Fig. G. — Larvae of workers major compared 

 with larva and pupa of small forms. Fig. 7. — Workers dragging 

 off adult l)oll weevil which they have killed 24 



III. Signs determining boll weevil emergence or entrance of ant Solenopsis 



geminata. Fig. 1. — Emergence hole of boll weevil in cotton square. 

 Fig. 2. — Entrance holes of ants in squares. Fig. 3. — Evidences 

 of adult activity in square from which weevil emerged. Fig. 4. — 

 Clean interior of square entered by ants. Fig. 5. — The three evi- 

 dences of adult weevil activity, removed from square: a. Shed 

 pupal skin; b, refuse formed in cutting emergence hole; c, ex- 

 crement of unfed, young adult 2(> 



IV. Shedding and retention of forms in cotton. Fig. 1. — a, 6, r, Normal 



scars left by shed forms. Fig. 2. — a, b, c, Abnormal scars with 

 forms retained. Fig. 3. — a, Longitudinal section through normal 

 scar; 6, longitudinal section through base of retained form 2() 



TEXT FIGURES. 



Fig. 1. Map of Louisiana, showing dispersion movements of 1903 and 1!MM 



and reduction of infested area by w'inter conditions of 1!H)4-HH)5. Ki 



2. Solenopsis geminata 24 



y 



