174 BRITISH APHIDES. 



in connection with theNos. 10 and 11 in Mr. Scudder's 

 list, strongly recall the genus Siphonophora, whilst 

 figures 4, 7, and 8 indicate, though modified, Aphis, 

 Lachnus, and Pemphigus. The antennas of the rest 

 are too fragmentary to allow much to be gathered 

 from them. 



With the exception of the small conical tube on 

 figure 5 no trace of nectaries can be found. This is 

 remarkable, as these organs are generally as coriaceous 

 and dense in texture as the legs. 



The name of Mr. S. H. Scudder is so intimately 

 connected with fossil entomology that any materials he 

 offers to illustrate that branch of ancient biology will 

 be very acceptable. Most liberally he has allowed me 

 not only to inspect some of the beautiful plates in pre- 

 paration for the fine work I have before alluded to ; but 

 also to figure some insects which bear on my subject, 

 and Avhich appear now on Plate CXXXIII of this 

 Monograph. 



The fully-developed cornicles shown by many Euro- 

 pean fossil Aphides prove that these organs are not 

 the development of a recent era. Still it might be 

 argued that, as there are no tails visible in any of the 

 individuals I figure on Plate CXXXIII, they never 

 possessed nectaries ; since one organ is mostly accom- 

 panied by the others. Nevertheless, I think other 

 characters are present so similar to those of recent 

 genera, that their absence is due rather to accident 

 than to a real deficiency in the species. 



These remarks particularly refer to my figures 1, 2, 

 and 3. The insects figured 4, 5, and 6 of my Plate, 

 probably never possessed nectaries. 



The suctorial habits of ancient Aphides are clearly 

 shown in figure 2, where the insect is represented in 

 profile ; and also in figure G, where the stout third and 

 fourth joints of the rostrum point pretty distinctly to 

 a Lachnus or to some allied genus. The exceedingly 

 delicate wing-veining is finely detailed. As some of 

 tlio wings are complete, even to their marginal tips, 



