— 103 — 



forms instead three as heretofore recognized, and pointed out the differ- 

 ences between them, making the pattern of maculation the criterion of 

 iiis species. 



Mr. Graef expressed his dissent from Mr. Smith's views, and sliowul 

 how in his opinion the maculation could be so modified as to produce 

 the different forms. 



Prof. Riley commenting on Mr. Smith's paper said that he did not 

 agree with him at all. He thought that there was but a single white 

 species and possibly there may be three rather well marked species, with 

 three moderately well marked larval forms. He said that in variation 

 not only color changes but sometimes the pattern does, also. Especially 

 i> this true in forms that have more than a single brood annuall}'. He 

 instanced cases in the 7'i rj-ici<Lc, wheie lorms apf)ear, so different in 

 pattern that theie seems no possible connecticju between them, but bred 

 from the same hatch o I eggs. 



Mr. Hulst also expressed his dissent from Mr. Smith's views. He 

 thought that the variability of other species in x.\\& Arcfiidce was well estab- 

 lished by breeding, and it should be at least considered probable that 

 other sjjecies in the same group varied as much. He had taken speci- 

 mens numerously, and ii seemed to him that he had taken forms from the 

 lightest to the darkest undtr such circumstances as to make it very cer- 

 tain they were one species. 



Mr. Smith replied bricl]\-, admitting the possibility that the white 

 forms may be albino forms of dark species but again emphasizing the 

 differences in pattern as indicative of specific value. 



Mr. Hulst stated that .Mr. Bruce had taken an insect in New York 

 which Mr, Edwards after examination said must be new and allied to 

 Stirarc/id. Before dying the moth had laid some eggo, ami larva; hatch- 

 ing from them seemed rather unlike anvtliing known to Mr. Bruce — he 

 took them with him to Colorado, where the}- completed their iransfojma- 

 tion, giving forth Spi/o.soiia virginica. 



Prof Riley said in addition to his previous statements that species 

 sometimes varv in certain definite directions. He also called attention to 

 the fact that Mr. Smith had described a new species o^ Eiieryf/u-a, while 

 that same form had been bred from the same larva with iT. phasma. 



On behalf of the Brooklyn Ent. Soc. Mr. Angell wclcc)med the mem- 

 bers to the city, and anounced that arrangements had been made to join 

 the Botanists in their excursion to Highlands in N. |. and distributed 

 tickets and circulars giving date and place of starting. 



(^n motion of Dr. ^Morris the meeting adjourned until Wednesday 

 August loth, at y A. M. 



