THE CANADIAN ENTOMOLOGIST. 291 



no trace of puncture gave out large numbers of Weevils, but in the 

 drier pods the aperture remains and often takes the form of an elongate 

 slit along the ventral suture. More often, however, the eggs are thrust 

 into the more mature pods through the natural opening, as the pods 

 dehisce. In reference to nomenclature, Professor Riley confirmed the 

 position he had taken in 1870 that our Bean Weevil is not Bruchus 

 obsoletus Say, this species having been rediscovered by Mr. Schwarz on 

 Tephrosia virginiana. Our Bean Weevil, he concluded, must be known 

 in future as Briichus obtedus Say. 



AN ADDITIONAL NOTE ON THE BEAN WEEVIL. 



BY C. V. RILEY, PH. D. 



In the note on the post-embryonic larvte of the Pea and Bean 

 Weevils, published in the August number of the Canadian Entomologist, 

 (p. 185), I have stated that the eggs of the Bean Weevil "are primarily 

 laid upon the bean pod in the field, but chiefly, if not entirely, upon those 

 which are already matured and ripening." This statement was based 

 upon the finding of the eggs upon more mature bean pods in years gone 

 by, and represents the current belief hitherto held. A more careful 

 examination of the eggs thus found the present season, after the note 

 above referred to had been sent to the editor, showed that they did not 

 entirely agree with the eggs of the Bean Weevil as laid on stored beans, 

 the difference being sufficient to justify a doubt as to the former being 

 those of the ordinary Bean Weevil, and to cause me to look into the 

 matter more fully, which I have done in my own garden the past summer. 

 The facts resulting have been recorded in Insect Life, Vol. V., No. i, page 

 32, and they show that the eggs hitherto taken for those of the common 

 Bean Weevil are, without much question, those of another Bruchus, 

 either Bruchus quadriinaculattis Fab. or B. scutellaris, both of which 

 infest beans. The eggs of our common Bean Weevil {Bruchus obtectus 

 Sayj are thrust into an aperture made by the jaws of the parent Weevil, 

 generally along the ventral suture near the funiculus, or else are laid in 

 clusters on the inside of the pod, wherever this is sufficiently ripe to 

 cause a partial opening. In the field the aperture must be made early 

 enough to permit more or less perfect closing by growth of the pod ; 

 whereas on mature pods it is often quite elongate and does not close. 



