36 THE REPOET OF THE A^o. 36 



though I believe the spraying helps. I have plenty of proof of the value of culti- 

 vation and removal of rubbish. 



Peof. iSwAiNE : Have you any evidence that the presence of plum trees about 

 the edges of apple orchards will tend to draw away the Curculio? 



Mr. C^sar: There do seem to be instances where this is the case. 



Peof, Swaine : I have seen some very interesting examples of this near Mac- 

 donald College. 



NOTES ON THE SEASON OF 1911. 

 Eev. Thomas W. F'yles, D.C.L., Hull, Que. 



SiLVANUs Surinamensis, Lin. 



Jan. 13th. Specimens of the Saw-toothed Grain Beetle (Silvamis surina- 

 mensis Lin.) from Ontario were brought to me. These mischievous little crea- 

 tures belong to the Cucujidae. The species is said to have been brought to the 

 Centennial Exhibition in straw goods from Italy. (See An. Eep- Ent. Soc. of Ont. 

 for 1876, page 23). The species is now widely distributed. I found it at Levis 

 in the granaries of the late Joshua Thompson, Esq. 



Fig. 23. Larva and pupa of water- 

 beetle (Dytiscus fasciventris) — one- 

 half natural size. 



Dytiscus fasciventris, Sa.y. 



May 27th. I caught two larvae of the Water Beetle (Dytiscus fasciventris Say) . 

 They were one inch long. Wlien they attained their full growth they were an inch 

 and five-eighths in length. They were sepia-coloured and had a pale dorsal line. 

 The head was large and round and furnished with two formidable nippers 6 milli- 

 metres long, and with antennae 10 millimetres. They had a horseshoe-shaped 

 suture on the top of the head. The second segment was small at the neck and 

 enlarged at the base. The three last segments were fringed on either side. The 

 tail was forked and fringed on the inner edges of the prongs. The legs wera' 

 fringed. The larvae crept into the earth and assumed the pupal stage on June 12th. 



The pupa was an inch long. In colour it was ochreous. The eyes Avere al- 

 mond-shaped, black. The legs were free. Two stumpy projections were at the 

 end of the body. The beetles appeared on the 23rd of June. 



The Eev. J. G. Wood, in "Insects at Home," Plate III., gives a representation 

 of the full-grown larva of Dytiscus marginalis. The Eev. W Houghton, in 

 " Country Walks of a Naturalist," page 31, represents the same insect in all its 

 stages. Both larva and pupa as represented differ somewhat from those of D. 

 fasciventris. 



