80 



650. GRAPE-VINE TOMATO-GALL. 



Lasioptera vitis. 



Model in wax of the abnormal growths on terminal twigs of the grape, 

 caused by the sting of a little gnat. (See No. 159.) 



651. GRAPE-VINE PHYLLOXERA-GALL. 



Phylloxera vastatrix. 



Model in wax of the galls produced by the leaf form of the grape 

 phylloxera, showing their characteristic appearance and disposition on 

 the leaf. (See No. 147.) 



652. AMERICAN PROCRIS. 



Procris americana. 



Twig of grape vine modeled in wax, showing the characteristic 

 appearance and work of the larvse and their method of feeding in uni- 

 form rows on the leaf. (See No. 175.) 



653. GRAPE-LEAP FOLDER. 



Desmia maculalis. 



Sprays of grape modeled in wax, showing the characteristic folding 

 of the leaves and the skeletonizing due to the attacks of the larvse. 

 (See No. 173.) 



654. THE GRAPE-SEED WEEVIL. 



Craponius incequalis. 



A bunch of grapes, showing damage to the berries by the larvae of 

 this insect; also punctures made by the female beetle in oviposition. 



(See No. 185.) 



ANATOMICAL MODELS OF INSECTS. 



655. THE SILKWORM. 



Sericaria mori. 



Enlarged model of the larva, showing its complete anatomy; the 

 muscles, nerves, trachae, viscera, the silk apparatus in its whole extent, 

 the silk- secreting gland, and the gland discovered by Auzoux which 

 secretes a liquid the use of which is most probably to convert the silky 

 matter into insoluble threads. In one of the prolegs may be seen the 

 muscles which move the claws and sucking discs which enable the 

 animal to walk with its true feet in the air. (After Auzoux.) 



656. THE SILKWORM. 



Sericaria mori. 



Enlarged models of the moth, male and female. In each model is 

 shown the atrophy of the digestive tube and the development of the 

 marvelous organs by which the species is perpetuated. (After Auzoux.) 



