10 



membrane. A <single ommatldlum consists of a hexagonal lens, a crystalline cone, 

 A Semper cells, 2 primary pigment cells, 6 ( econdary pigment ceils, 6 retinula 

 cells which contribute to the formation of a central rhabdom that extends from 

 the Semper cells to the basement membrane, and 2 basal pigment cells that sur- 

 round the base of the retinula cells. The 6 axons, 1 from each of the 6 retinula 

 cells, join and penetrate the basement membrane as a bundle. Each bundle of 

 primary nerves converges with other bundles to f rm larger bundles that enter 

 the optic ga-iglion. 



11. ArJerson, D. M. 1968. Observations on the pupae of Anthonomus grandis 

 grandis Boheman and A. grandis thurberiae Pierce (Coleoptera: Curcu- 

 lionidae). Ann. Entomol. Soc. Am. 61: 125-129. 



Typical pupae of the boll weevil, Anthonomus grandis grandis Boheman, from 

 the southeastern United States were found to differ in certain respects from 

 typical pupae of the thurberia weevil, A. grandis thurberiae Pierce from 

 Arizona. The differences are found in the relative length of a pair of 

 tubercles on the rostrum, in the number of well-developed setae on the post- 

 erolateral a^eas of the prothorax, and in the spacing of the setae on the 

 anterolateral areas of the prothorax. A small portion of the specimens 

 examined was observed to vary from the normal pattern of diferenccs. It was 

 found possible to distinguish the sex of pupae of both kinds of weevil by 

 the pair of lobes present near the anal opening in females. The lobes are 

 not present in males. 



12. Andrawes, N. R., and Dorough, H. W. 1967. Metabolic fate of carbaryl- 

 naphthyl-C in joll weevils and bollworms. J. Econ. Entomol. 60: 453-456. 



Adult boll weevils, Anthonomu s grandis Boheman, were treated topically and 

 bolivorm, Heliothis r.ea (Bcddie), larvae and adults were treated by injection 

 with carbaryl-naphthyl-C . Hydrolytic as well as oxidative mechanisms were 

 involved in the degradation of the carbamate in both species. Chloroform- 



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