NO. I 



THE INSECT HEAD — SNODGRASS 



53 



segment is that of the antenna. Friza and Przibram (1933), from 

 amputation experiments on Sphodromantis and Drosophila, report 

 that the regenerated pedicel always contains an organ of Johnston, 



Fig. 21. — Examples of normal and leglike antennae. (A, B, C, from Len- 

 gerken, 1933; D, from Cuenot, 1921; F-H, from Bodenstein and Abdel-Malek, 

 1949)- 



A, Trachyderes siiccinctus, Coleoptera, normal antenna. B, C, Same, left and 

 right leglike antennae found in nature. D, Carausius morosus, Orthoptera, adult 

 antennal regenerates after section through middle of second segment. E, Dro- 

 sophila virilis, Diptera, normal antenna. F-H, Same, antennae of adults reared 

 from larvae treated with nitrogen mustard, showing various degrees of leg- 

 like regeneration. 



and that the usual muscles are present in the scape. Here again, 

 therefore, it is only the flagellum that undergoes malformation dur- 

 ing regeneration, and the new appendage never reproduces the com- 

 plete segmentation of a leg. In some insects no regeneration follows 

 complete amputation of an antenna, as reported by Gabler (1934) in 

 his study of liomoptera. 



It is the conmion presence of apical "claws" on the regenerated 



