all}- — but it is difficult to do so and get good fruit. It is ahva)S more or 

 less imperfect. Pronuba always succeeds. It makes two or three punct- 

 ures, and gets all around the tube, bringing the pollen into contact with 

 even- part of it. There are from 4 — 500 Yuccas in the Dep't Grounds 

 where he passes daily, and during the entire season he found but a solitary 

 bee on two successive mornings and none of die others in the Dep't ob- 

 served any. This bee was not inside, but tried to get at the nectar from 

 the outside of the (lower. 



Mr. Bassett asked whether this is ever repeated — whether a flower is 

 visited by more than one moth. Prof. Riley thought not— hut it may be. 

 He has no direct evidence on that point. 



He also spoke of a new species of Lecanium found on the Austrian 

 pine, in Wisconsin, of which the males were numerous. The males of 

 this species have been heretofore found very rarely and of many they arc 

 entirely unknown. In France the ^ of Lecanium hesperidum has been 

 found in the body of the 9 which it never leaves. It is a ven much de- 

 graded form. 



Prof. Riley. quoted Moniez's observations on this species as given in 

 the Ent. Mo. Mag. for July 18S7, showing the development of the <$ 

 and the bearing of the discovery on the question of parthenogenesis. I It 

 remarked upon the fact that discoveries aie often made in widely different 

 localities by observers, of the same facts, instancing several cases where 

 at about the same time males of this genus have been discovered. Mr. 

 Koebele has in California reared the males of two different species having 

 wings and other distinctively male characters. 



He also said that he finds Crioca is asparagi extending South — it has 

 been found at Falls Church, Fairfax Co., Va. 



The present year there has been a most remarkable swarming of 

 Apatura celtis in the Southern States. These migrations generally take 

 place in the Fall, but this was in the Spring. The only way of accounting 

 For it is that the conditions where unusually favorable for their hiberna- 

 nation and development. 



Prof. Cook said they have many Yucca filamentosa and he has found 

 bees on them very abundantly. So far as he knows they have not the 

 Pronuba in Michigan. 



He had not noticed particularly what part of the flowers the bees 

 visited. 



Prof. Riley said that in Colorado on a species of J 'ucca he discovered 

 a most remarkable species of Pronuba, flat-bodied with dusk}' wings, look- 

 ing almost like a cross between a saw-fly ami a Phryganid. 



(To BE CONTINUED.) 



