182 THE CANADIAN ENTOMOLOGIST. 



Mr. Riley said that the larvae in Missouri are frequently found in 

 water, and he had no doubt but that the eggs he had referred to were 

 those of Corydalis cornutus. 



Mr. Scudder stated that Mr. Sanborn had frequently taken large num- 

 bers of the larvae in the water in the neighborhood of Cambridge. 



Mr. Saunders had never found them in the water, but had frequently 

 captured them buried in moist sand or under stones along the banks of 

 rivers. 



Mr. Riley next exhibited to the Club some silken masses containing 

 eggs of Hydrofihilus triangularis, which were very remarkable and 

 interesting. 



Mr. Saunders offered some remarks on a mass of pupae and escaping 

 insects of Calopterou reticulatum . which he found one morning early in 

 summer at the roots of some long grass. The mass was fully as large as 

 a hen's egg, and must have contained some hundreds of individuals. A 

 large number of the freshly escaped insects were captured with a view to 

 ascertain whether there was much variation in the markings and whether 

 the form term iu alls, which is said to be a variety of reticulatum, could be 

 found among them. He saw none approaching this latter form — all were 

 well marked specimens of reticulatum. 



Dr. LeConte mentioned the curious fact that in some species of 

 Calopteron the larval skin was not shed when it pupated, but that the larva 

 skin and pupa skin both remained in situ until the perfect insect escaped. 



Dr. Morris then made some interesting remarks on the mouth parts 

 of the woodpeckers. 



Mr. Riley exhibited specimens of blown larvae very nicely set up ; he 

 thinks, however, that in this condition they are scarcely of value for scien- 

 tific study, and for this purpose prefers the specimens preserved in 

 alcohol. 



Mr. Scudder differed from Mr. Riley, and thinks that the advantages 

 are in favor of the blown specimens, and much prefers to study larvae in 

 this way. 



Dr. Hagen agreed with Mr. Scudder that blown larvae were advan- 

 tageous for study. 



Dr. Morris asked if any of the gentlemen present who were in the 

 habit of raising larvae, had made any observations in reference to the 

 length of time the development of the perfect insect may be retarded. 



