266 



Forty-first Report on the State Museuil 



lights, it has of late in many localities become known as " the electric- 

 light bug." 



Ceresa bubalus (Fabr.). — Several twigs of apple-tree from the 

 nursery of Maxwell Brothers, at Geneva, N. Y., com- 

 municated by Mr. Goff, contained the egg-deposits 

 of the "buffalo tree-hopper." A piece of a twig two and 

 a half inches long showed eighteen of these deposits, 

 averaging eighteen eggs in each. Figure 61, repre- 

 sents the insect, enlarged to about twice its natural 

 size. 



Fig. 61— Ceresa As the mode of oviposition has been differently 

 BUBALUsiFabr.), n. ., , i t«. , ., n . 



enlarged. described by different writers, and m some cases erro- 



neously, it is with pleasure that we give place to a portion of a note 

 recently communicated to the "Industrialist," of Manhattan, Kansas, 



upon the method of egg-laying 

 in this insect, by Professor 

 Popenoe, with the figures which 

 satisfactorily illustrate it. 



" The irregularly circular or 

 oblong scars, resulting from the 

 growth of the injured bark upon 

 branches and twigs punctured 

 by the insect in question, occur 

 numerously on the twigs of vari- 

 ous trees, especially upon the 

 willow, soft maple and apple. 

 In a young apple orchard in 

 this vicinity, the scars were so 

 numerous that the growth of 

 the trees was lessened and their 

 shape injured in consequence. 

 The slits in the bark, made by 

 the ovipositor of the female tree- 

 hopper, are two in a place, 

 slightly curved, their concave 

 sides facing. The strip of bark 

 between these slits is separated 

 from the wood, as the insect 

 thrusts the ovipositor from each 

 slit to the bark under or beyond 

 FiG62.-Ovipositionofthe Buffalo tree-hop- ^j^g Opposite slit, the eggS in 

 per, Ceresa bubalus; showing the insect at i ■'^■'- i ■ ^ • • 



work.searsmadebyitinthe wood, a section each row having been mtro- 

 of a twig with bark removed with egg-clusters duced through the sllt above 

 in place, and an enlarged egg-cluster. (After the opposite row. The growth 

 Popenoe.) of the bark is thus checked, and 



the incisions remain for several years as the irregular scars above 

 noted. The wounds are made more numerously upon the upper side 

 of the branch, and are often so abundant that the branch is deformed 



