XXXJi, '21] ENTOMOLOGICAL NEWS 209 



Miscellaneous Studies in the Family Aphididae 



(Hem. Horn.). 1 



By ALBERT F. SWAIN, Fresno. California. 



V. NOTES ON SOME LACHNIDS IN THE BRITISH MUSEUM. 



During the spring of 1919 the writer, while a member of 

 the Detachment of United States Army Students in British 

 Universities, had an opportunity to spend a few weeks in study 

 at the Natural History Museum (British Museum), London. 

 Unfortunately his time was limited, so only a portion of the 

 aphid collection in the Museum was studied by him, having 

 confined himself entirely to the study of the Lachnids in the 

 Francis Walker and George Buckton Collections. 



It is probable that the specimens in both of these collections 

 are the ones from which Walker and Buckton drew up their 

 descriptions, but unfortunately this is not at all certain. In 

 neither collection do the specimens bear labels which would 

 indicate whether or not they are type specimens, or whether 

 they are the specimens used in the describing of the species. 

 Those in the Buckton collection bear labels showing Buckton's 

 determination, and in some few cases showing host and locality 

 records. In the majority of the specimens the collection data 

 are by means of key letters, the key to which is not now avail- 

 able. In the Walker collection the labels show his determina- 

 tion, host, locality and date of collection. As just stated, there 

 is no certainty that these are the specimens from which Walker 

 and Buckton drew up their descriptions and in some cases there 

 is a discrepancy between their descriptions and the specimens. 

 However the writer believes these were probably due to the lack 

 of modern equipment, such as microscopes and micrometer 

 scales, rather than to the fact that other specimens were used. 



In the following notes the writer has listed the actual speci- 

 mens available, and where discrepancies exist between them 

 and the descriptions, such are noted. In addition the writer 

 has attempted to place these species in their proper place as 

 understood at the present time. In this he has followed tin- 

 generic classification of A. < '. Raker.- \s for specific di-U-rmi- 



J This paper is a continuation of one, the first four parts of which 

 were published in Entomological AY,v.9, December 1918, pp. 361-369. 

 2 Baker, A. C., U. S. Dept. Agr. Bull. 826, August, 1920. 



