THE HIDDEN TYPE OF WING-GROWTH 117 



while its comparatively tiny legs are inconspicuous. In a later 

 stage, the larva assumes a legless condition during which 

 it remains quiescent and does not feed ; this is followed 

 by another stage in which short legs are again evident, leading 

 on to the pupal period and the completion of a most remark- 

 able transformation. For the active armoured early larva, 





ap 

 PyllF 



xs ' >-^ 



1" 



a 



FIG. 67. STREPSIPTERA. 



a, Tetrozocera Santchii, male (dorsal view), x 20. b, Xenos vespamm, female (ventral view). 

 X 6. c, first-stage larva of Stichotrema (dorsal view), x 50. d, second larva of Xenos 

 (dorsal view). x 6. a and c, after Pierce, Proc. U.S. Nat. Mus. LIV ; 6, after Berlese, 

 Gli Insetti ; d, after von Siebold, Arch. f. Naturgesch. IX. 



like that of a ground-beetle, passes into a sluggish, soft-bodied 

 grub like that of a longhorn or a weevil. We notice here that 

 the campodeiform larva precedes the cruciform in the life- 

 history, the former condition being suitable for the tiny 

 creature's invasion of an egg-cluster or its transport through 



