70 



PSrCHE. 



[June iSS8. 



the neighboring genus Scaphiira from Bra- 

 zil. It has been suggested that since chloro- 

 phyll is found in certain insect tissues, tlie 

 color might be changed by frost, but this 

 could not have been possible in the Woods 

 Holl specimens, as they were found too early 

 in the season. 



Mr. J. H. Emerton exhibited figures of the 

 eggs of diurnal lepidoptera, which he had 

 drawn for Mr. S: H. Scudder, a figure of the 

 micropyle of a species of hesperid, and fig- 

 ures of the larvae of various butterflies. 



Mr. S : H. Scudder showed a figure of the 

 pupa of Feniseca tarquinius and remarked at 

 some length on the habits of this interesting 

 species. The chrysalis has a curiously ex- 

 panded cremaster. The larva differs very 

 much from those of other copper-butterflies 

 with which it has been placed, by having 

 large protruding legs and a scarcely retrac- 

 tile head, while in its earlier stage, according 

 to Mr. W : H. Edwards, it is completely cylin- 

 drical, and in no way onisciform. The &^,^ 

 is not pitted, but only possesses polygonal 

 marking. 



Dr. G: Dimmock asked if there had been 

 any study of the mouth-parts of the larva 

 of Feniseca, with reference to any modification 

 for its insect food. 



Mr. J. H. Emerton exhibited a drawing of a 

 wasp in the act of eating a fly. [See Psyche, 

 May 1888, V. 5, p. 54.] 



Mr. C : W. Woodworth stated that the only 

 wasps that sleep with their mandibles grasp- 

 ing upon grass or sticks were males of sphe- 

 gidae. 



Mr. S : H. Scudder showed eggs o{ Argyn- 

 nts idalia. Most of the eggs were laid upon 

 the lace with which the butterflies had been 

 covered during transportation, and not upon 

 the violet leaves which had been placed with 

 the butterflies. Some of the eggs were laid 

 upon the lace while in the cars, the butterflies 

 being in a dim light under a seat. All the 

 eergs were pushed through by the ovipositor 

 of the female so as to stand on the outside of 

 the lace. 



9 April 1886. — The 119th meeting Avas 



held at 61 Sacramento St., 9 Apiil 18S6. In 

 the absence of the president, Dr. G : Dim- 

 mock was chosen chairman. 



The additions to the library were an- 

 nounced by the librarian. 



The secretary stated that a reply had been 

 sent to the invitation to attend a celebration 

 of the fiftieth anniversary of the foundation 

 of the Verein fiir naturkunde zu cassel. 



Nominations nos. 136-142 were acted on 

 and the following persons elected to Active 

 membership: Prof. T: J. Burril, Champaign 

 111: W : H. Garman, Champaign 111: Clar- 

 ence M. Weed, Champaign 111 : C: A. Hart, 

 Champaign 111: T: F. Hunt, Champaign 

 111: Prof C. Robertson, Carlinville, 111: C: 

 W: Woodworth, Champaign 111. 



Mr. S. H. Scudder spoke of a recent paper 

 by Dr. Paul Oppenheim of Berlin upon fossil 

 lepidoptera, in which new light was thrown 

 upon some hitherto insufficiently known 

 fossils from Solenhofen which had been 

 referred to hemiptera, lepidoptera and hy- 

 menoptera. Dr. Oppenheim claimed, and 

 apparently with some reason, that they 

 should be referred to a distant archaic type 

 to be considered the progenitors of lepidop- 

 tera. Two new Jurassic forms were described 

 from Siberia which should probably be re- 

 ferred to the same archaic type, though 

 looked upon by Oppenheim as true lepidop- 

 tera. 



The Club then visited the laboratory of 

 Dr. Dimmock, who showed his apparatus 

 for rearing insects in constant increased 

 temperature. He also showed some speci- 

 mens of Hipfodamia coiivergens which had 

 been thus reared, and remarked on the differ- 

 ence in time of development and the varia- 

 tions caused by this artificial method of 

 rearing. He further remarked on observa- 

 tions he had made as regards the time of 

 appearance of the spots in various species of 

 cocciuellidae. 



Prof Alpheus Hyatt said that he had been 

 much interested in Dr. Dimmock's exper- 

 iments on the acceleration of development, as 

 it has a close bearing on his own studies. 



