GENUINE SNOUT-BEETLES. 207 



THE WALNUT CURCULIO. 



(Cono tracheitis jit gland is Lee). 



Looking at the adult of this heetle we arc apt to imagine 

 that we have before us simply a very large specimen of the plum- 

 curculio, with the white band across the posterior portion of the 

 wing-covers whiter and more clearly marked. The sealingwax- 

 like projections, which form such a distinctive feature in nenuphar 

 are also present, while in all other species of the large genus Con- 

 otrachelus they are either simply indicated or entirely absent. 



The injury caused to our native walnuts and butternuts by 

 these beetles is considerable, as they frequently take more than 

 the lion's share, so that no nuts are left for our use. Infested 

 nuts show the presence of the worm inside by a discolored spot 

 upon the green husk, from which dark-colored masses not infre- 

 quently project. 



Several other species occur, for instance C. crataegi Walsh, 

 in the fruits of hawthorns ; C. clcgans Say, in the partly rolled up 

 leaves of the pig-hickory, which being cut off hang down, with- 

 er and turn black; C. naso Lee, and C. posticatus Say, in the fruit 

 of the haw. 



THE QUINCE CURCULIO. 



(Conotrachclus crataegi Walsh). 



As already mentioned this beetle is found in Minnesota, and 

 eats in its larval stage the fruits of the hawthorn ; but in the 

 east it has become rather destructive to the quince. As may be 

 seen from the illustration (Fig. 221), it is a broad-shouldered 

 snout-beetle, larger than our enemy, the plum curculio, possessing 

 also a larger snout. It is of an ash-gray color, mottled, in fresh 

 specimens with ochre-yellow or white, with a dusky and almost 

 triangular spot at the base of the pro-thorax ; there are seven 

 narrow longitudinal ridges on the elytra, with two narrow rows 

 of rather deep pits between. It is most commonly found during 

 the month ^>f June, when it punctures the young fruit, making 

 a cylindrical hole a little larger than is sufficient to admit the egg ; 



