THE CANADIAN ENTOMOLOGIST. 173 



Mr. Westcott gave an account of the mode of building its web by a 

 Geometrical Spider, and stated that the insect when forming the concen- 

 tric lines across the rays measured the distance from the next parallel 

 line by means of its second right fore-leg before attaching the thread to 

 the ray. 



Prof. Cook, in answer to a question, stated that he had found a mix- 

 ture of honey and beer equally efficacious with the ordinary mixture for 

 sugaring. 



Mr. Grote remarked that he had found the Colorado Potato Beetle 

 feeding upon a large cultivated variety of Datura, and feared that it would 

 probably soon prove a serious enemy to the Tobacco plant, another mem- 

 ber of the family Solanacece. 



Prof. Riley stated that he had found the Colorado Beetle in South 

 Carolina. 



The meeting adjourned at 6 o'clock. 



MONDAY, AUGUST 30TH. 



The Sub-section of Entomology met at the Institute this morning, Dr. 

 J. G. Morris in the chair. For the first time the titles of the papers to be 

 read, with the names of the officers, were published in the Association 

 programme for the day. 



Prof. Fernald gave a brief description of his method of preparing and 

 mounting the wings of micro-lepidoptera. 



Mr. B. P. Mann gave an account of the contributions of the Cambridge 

 Entomological Club and the progress of Entomology. 



Prof. C. V. Riley described the life-habits of certain Bee-flies (Bomby- 

 liidae), and made some remarks on Tree-Crickets and on the early stages 

 of Blepharocera. 



Dr. Hagen exhibited a specimen of Passalus cornutus, which was 

 entirely destitute of any trace of elytra, but possessed wings and all other 

 parts quite perfect. He stated that it was impossible that the elytra had 

 been artificially removed and that he considered this to be a very rare 

 natural deformity. 



Rev. C. J. S. Bethune, in the absence of Dr. Hoy, who was to have 

 read the next paper on the occurrence of Aletia argillacea in Wisconsin, 

 stated that he had learned in conversation with Dr. Hoy that this moth 

 had occurred in immense numbers on ripe melons near- Racine, Wis., and 

 that he had himself, in the autumn of 1865, taken a great quantity of the 



