OF WASHINGTON. 131 



hibited a number of specimens of several orders which he ob- 

 tained from insect drift at Virginia Beach, Va., between 9:30 

 and 10 a. m., on November 11, 1907. Mr. Schwarz said that 

 drift at such a late season was remarkable, and showed a late 

 flight of all orders, the insects probably seeking winter quarters. 



Doctor Hopkins stated that the region is remarkable as an 

 intermediate region where the different faunal zones overlap. 

 He found that most of the mature pines (Pinus tieda) nearest 

 the ocean from Ocean View to beyond Virginia Beach were 

 being killed by Dendroctonus frontalis. This condition is 

 reported to prevail to Cape Hatteras and beyond. He thought 

 that the reason for this killing of a strip of the timber nearest 

 the ocean was that the swarms of the beetles in their eastward 

 migrations could go no farther than the ocean and so settled 

 on the surrounding timber. 



Doctor Howard stated that although Mr. F. C. Pratt had 

 found the yellow fever mosquito {Stegomyia calopus Meig.) 

 common at Virginia Beach in 1902, Doctor Hopkins had not 

 obtained a single specimen of it. This indicated that Stegomyia 

 was not a regular inhabitant of the locality, but would, as at 

 St. Louis, live there during favorable seasons. 



— The following papers were presented for publication : 



THE GENUS PSEUDAONIDIA 



By C. L. Marlatt. 

 (Plate VII.) 



In Technical Series No. 6, U. S. Department of Agri- 

 culture, p. 14, Prof. T. D. A. Cockerell designated Pseuda- 

 onidia as a subgenus of Aspidiotus, with the type species A. 

 duplex, to include also A. thece Maskell and A. trilobififormis 

 Green. The "latticework patch" is the character given, and 

 the fact that this patch is shared by the genus Ischnaspis in an 

 entirely different group is also alluded to. Other species have 

 since been assigned to this group, and it is raised to the full 

 generic rank in Mrs. Fernald's Catalogue of the Coccidse of 

 the World, the total number of species there assigned to it 

 being 8, including 2 varieties. 



The writer has recently made a careful study of the species 



