34 THE CANADIAN ENTOMOLOGIST. 



THE ENTOMOLOGICAL CLUB OF THE AMERICAN ASSO- 

 CIATION FOR THE ADVANCEMENT OF SCIENCE. 



St. Louis, Mo., Dec. 30 and 31, 1903. 



One of the most enjoyable features of the St. Louis meeting of the 

 A. A. A. S., from the entomologists' standpoint, was the informal sessions 

 of the Entomological Club, held at the Southern Hotel on the evenings of 

 Dec. 30-31. The duties of chairman were discharged by Dr. Jas. 

 Fletcher in his inimitably felicitous manner, the proceedings being 

 recorded by Messrs. Kirkland and Wilcox. Among those present were : 

 Messrs. Howard, Marlatt, Lochhead, Corbett, Clifton, Symons, Cooley, 

 Frost, Adams, Sanderson, Fairchild, Burgess, Fletcher, Gillette, Felt, 

 Knab, Kirkland and others. 



Mr, Marlatt gave a description of a recent trip in California, and 

 described in detail the work of the introduced parasite, Sadellista cyaiiea, 

 on the black scale {Lecajiium olece). This insect has become well 

 established in Californian orchards, and now practically controls the black 

 scale. It will probably prove as valuable an ally of the fruit-grower as 

 has Vedalia cardhialis in the case of the white scale {Icerya pjirchasi). 



The black scale is a general feeder, breeding on orange, pepper-tree, 

 erigeron, cockle-burr, sunflower, Chili pepper, etc. It results that these 

 food plants keep up the stock of scale in which the Srutellistti breeds, 

 and it in turn attacks the scale in the orchards. So valuable has the 

 Sadellista proved, and so general is the appreciation of its services, that 

 it is not unusual for orchardists suffering from the scale attack to 

 surreptitiously remove infested scales from the orchards of their more 

 fortunate neighbors and thus colonize the parasite among their own trees. 



Dr. Howard discussed the first importation of Sadellista to Baton 

 Rouge, La., several years ago, to which place he sent the parasite, 

 hoping it would prove effective against certain Ceroplastes common there. 

 This introduction, according to Prof Morgan, was a failure. When 

 Lounsbury bred the Sadellista on the black scale in S. Africa, Dr. 

 Howard at once arranged for an importation of the parasite to California, 

 where, through the work of the agents of the Department of Agriculture, 

 and Mr. Craw, the insect has now become well established,, with results as 

 previously described by Mr. Marlatt. 



The Sadellista was probably sent to South Africa originally on plants 

 from English colonists at Ceylon, where it is a native species. It is the 

 first known Chalcid that destroys all the eggs of its host. In the case of 



