82 ENTOMOLOGICAL SOCIETY 



anterior wings and serve to connect the two in flight. The clear 

 spots or " bullae " of Walsh, which sometimes occur particularly 

 on the veins of the anterior wings, have not proven of very great 

 value in the separation of species. 



Considerable variation will be found in the venation within 

 generic limits, and even in some cases in the same species, but a 

 little experience will soon enable one to properly refer such 

 specimens. That the absence or presence of any particular vein 

 is abnormal will usually be indicated by the position of the 

 other veins and the character of the venation as a whole. 



The paper was discussed by Messrs. Ashmead, Riley, and 

 Howard, Messrs. Riley and Ashmead suggesting one or two 

 changes in nomenclature, and Mr. Howard calling attention to 

 the comprehensive system of numeral designation of veins pro 

 posed by Redtenbacher and based upon evolutional studies. He 

 urged the adoption of this system by specialists. 



Prof. A. D. Hopkins, of West Virginia, presented short notes 

 upon, and finely executed drawings of, certain ''timber worms" 

 which produce the so-called pin-holes in the solid wood of various 

 trees, and are thus very injurious. The species discussed and 

 exhibited were the following: i, Iarva3 of Hyleccetus lugubris 

 from chestnut; 2, larva? of Serropalpus striatus from black 

 spruce ; 3, larvaB of Eupsalis minuta from oak, and which is 

 much more injurious than has hitherto been supposed ; 4, an un 

 known Coleopterous larva with a curiously formed anal segment, 

 greatly injurious to oak and chestnut timber, which is identical 

 with an unbred larva figured and described by Prof. Riley in his 

 6th report on the insects of Missouri (Fig. 32), where it is sug 

 gested that it may be the larva of the genus Strongylium. Prof. 

 Hopkins also exhibited very fine specimens of the work of an 

 Agrilus (probably bilineatus} which appears to be the primary 

 cause of the wide-spread dying of the chestnut trees. In one of 

 these samples the galleries had been completely filled up by a new 

 growth of hard wood. 



In the discussion of this paper, Mr. Schwarz stated that he was 

 greatly interested in the undetermined larva which had been figured 

 by Prof. Riley in his sixth report, and suspected to belong to the 



