Walter Ritchie 315 



in the female (Fig. 14 a) instead of the membranous plate there are two 

 globular tubercles (at) placed anteriorly side by side. 



The Reproductive Organs. 



Saperda carcharias has, in my observation and breeding of it, a short 

 adult life in comparison with some Curculionid and Scolytid beetles, 

 only about two months, and its reproductive organs, though not quite 

 mature on the issue of the imagines from the pupal condition, ripen in 

 a short time. 



a 



Fig. 14 a. Ventral view of the last three abdominal segments of female pupa of S. car- 

 charias (greatly magnified). «« = anus; ai = anal tubercle on tenth segment; e< = eighth 

 sternite; nt = ninth sternite; st = seventh sternite. 



Fig. 14 6. Ventral view of the last three abdominal segments of male pupa of *S'. carcharias 

 (greatly magnified). c = membranous plate; other letters as in Fig. 14 a. 



The male reproductive organs of Saperda carcharias. 



The reproductive organs as dissected out from a male are shown in 

 Fig. 15. They are made up of the usual parts, testes (ts), vasa deferentia 

 (vd), seminal vesicles (sv), common or ejaculatory duct (cd), internal 

 sac (is) 1 and the chitinous pieces, viz. median lobe (ml), tegmen (t), 

 and spiculum gastrale (sp). 



The testes (ts) are paired glandular bodies and lie on each side of the 

 abdomen ventrally. Each body is dull yellow in colour and one lies 



1 In this description I have followed the terminology adopted by Sharp and Muir in 

 their studies of the male genitalia in Coleoptera. In these studies the nomenclature of the 

 earlier workers is reviewed and criticised Trans. Entom. Soc. Land. 1912, Part III, 

 pp. 477 et seq. "The comparative anatomy of the male genital tube in Coleoptera," Sharp 

 andMuir. Also same Journal, 1918, Parts I and II, pp. 209-229. "Studies in Rhyncophora," 

 D. Sharp, and "Notes on the Ontogeny and Morphology of the male genital tube in 

 Coleoptera," F. Muir. 



