OF WASHINGTON. 237 



erence to the facts brought out in a paper read by Mr. Ashmead. 

 Messrs. Riley, Gill, Schwarz, Howard, Ashmead, Marx and 

 otfiers participated in the remarks. 

 Mr. Howard read the following note : 



APPEARANCE OF MEALY BUGS PARASITIZED BY 

 LEPTOMASTIX. 



BY Iy. O. HOWARD. 



A species of the encyrtine genus Leptomastix which I de 

 scribed in 1885 as L. dactylopii is a not uncommon parasite of 

 the common mealy-bug of the greenhouse in Washington. It 

 was reared in large series in the Division of Entomology 

 in 1884, and although not observed since, it is probably only 

 because we have not looked for it. Miss Lillie Sullivan has 

 found it the present season infesting mealy-bugs upon house 

 plants at her residence on R street, and informs me that she can 

 at once recognize infested scales by the fact that they lose al 

 most entirely their waxy or meal-like covering and swell up 

 into yellow objects closely resembling dipterous puparia. She 

 has shown me several from which the parasites have emerged 

 and I have been greatly struck by this resemblance, which is 

 heightened by the fact that the parasite in issuing cuts off a 

 cap at the end of the scale insect, just as the dipterous insect 

 forces off the end of its puparium. This is an abnormal habit 

 so far as I know, as allied parasites are accustomed to gnaw 

 holes through their hosts, removing the epidermis in small 

 particles and leaving no cap. The resemblance of the swollen 

 mealy bug to a dipterous puparium is so strong that only by 

 close search with a strong lens can the observer, by finding 

 the minute legs and antennae, be certain of its identity. 



Prof. Fernow gave a report on the results in Europe of the 

 use of the new insect lime to which he had called the Society's 

 attention at a previous meeting. He has furnished the follow 

 ing abstract of his remarks : 



RESULTS ON WORK AGAINST PSILURA MONACHA IN 



EUROPE. 



BY B. E. FERNOW. 



[AUTHOR'S ABSTRACT.! 



Mr. Fernow gave further account of the use of insect lime 

 against Psilura monacha. Tar bands had been employed in 

 single cases against it in 1829, and ten years later against 



