Dec, 1908.] Proceedings of the Society. 247 



Professor Wheeler read an interesting paper on Cremastochilns which is to be 

 published in the June number of the Journal. 



Mr. Dow exhibited a specimen of Prometkia moth which was abnormal in the 

 shape of the angles of the wings. 



Mr. Stebbins exhibited a moth, Estigmene acresa, with the fore wings darker than 

 the normal form. 



Mr. Osborn spoke of finding a species of Cheilosia (one of the Syrphidse) at 

 Garrett Rock near Paterson. X. J., which had heretofore been taken only in Colorado. 



Mr. Schaeffer remarked that Mr. Schott had taken a rare beetle, Anatrichusminu- 

 ttts, at Huntington, Long Island. 



Society adjourned. 



Meeting of May 29, 190S. 



Held at the American Museum of Xatural History, President C. W. Leng in 

 the chair, with sixteen members and seven visitors present. 



The minutes of May 5 were read and approved. 



The Librarian, Mr. Schaeffer, reported the receipt of the following exchanges : 



Descriptions of New Species of South American Geometrid Moths by William 

 Warren. 



Descriptions of New Curculionid Beetles of the Tribe Anthonomini by W. D. 

 Pierce. 



Descriptions of Three New Species of Saturnian Moths by William Schaus. 



On a Collection of Thysanopterous Insects from Barbadoes and St. Vincent 

 Islands by H. F. Franklin. 



Notes on some Western Orthoptera by A. N. Caudell. 



Canadian Entomologist, XL, No. 5. 



Verhandlungen d. k. k. zool. Bot. Gesellschaft in Wien, LVIII, Xos. 2 and 3. 



Tijdschrift voor Entomologie, 1 90S, No. 1. 



Mr. Dow, chairman of the field committee, announced an excursion of the New- 

 ark, Brooklyn and X T ew York societies to Great Piece Meadow on Decoration 1 'ay. 



On motion of the secretary the June meetings of the society were dispensed with. 



Professor J. B. Smith gave an illustrated lecture on the " Development of Mouth 

 Parts in Insects." He mentioned the Thysanoptera as having the simplest typo of 

 mouth parts. The Hemiptera not having mandibles present at any stage in their de- 

 velopment were emandibulate, while all of the other orders showed the mandibulate 

 character at some stage in their development. He dwelt particularly upon the mouth 

 parts of the locust as being particularly typical of the mandibulate type and pointed 

 out the homology between these and corresponding parts of other insects. In con- 

 nection with the Diptera he said that there existed in text-books a great deal of mis- 

 conception concerning the homology of their mouth part?. 



Professor Wheeler differed from Professor Smith in the assumption that the 

 Hemiptera were emandibulate during their entire development and showed drawings 

 of the early embryos of Ranatra and Zaitka as evidence. He also took issue with 

 Professor Smith on the homology of some of the mouth parts of the Diptera. 



Mr. Engelhardt exhibited a collection of Sesiidae comprising all but three of the 

 species recorded from the eastern United States. His remarks related briefly to their 

 feeding habits and economic importance. He mentioned briefly the life history of 

 several species heretofore unknown and spoke of a new species of Memythrus. 



