1886. 1 151 



The description of the (^ scale of Aspidiotus quercus, Sign. (/. c), 

 found on oaks, accords with my examples, but the dimension is not 

 given ; it is only said " Cette espece nous parait distincte de zonafus, 

 Frauenfeld." 



To elucidate the matter, I sent some leaves with (^ scales attached 

 to Dr. Signoret, and he, with his usual courtesy, at once replied : " Les 

 echantillons sur chene sont V Aspidiotus zonatus, Frauenf., = Asp. 

 quercus, Sign. Je n'avais pu reconnaitre d'abord cette espece a cause 

 des differences de couleurs, mais I'ayant re9ue de Vienne je n'ai plus 

 aucun doute a cet egard." I may surmise that, as in other species of 

 Aspidiotus, the colour changes with the age of the scale ; the length 

 evidently varies. 



The scales I examined were empty, no doubt due to the previous 

 exit of the ^ , the time for its appearance, as stated by Frauenfeld, 

 being the end of August or beginning of September ; but Mr. Gr. S. 

 Saunders, to whom I sent some scales, was fortunate enough to obtain 

 two males, one of which was alive. 



In comparison with the number of $ scales, of which there were 

 sometimes as many as 30 on one leaf, those of the ? were scarce. 

 They are small and rounded, but I suspect would grow much after the 

 fecundation of the ? , and that the eggs would not hatch until next 

 year, so that there may possibly be a summer brood. Signoret found 

 (J scales on the trunk as well as on the leaves ; this I failed to do, but 

 without there are ? scales and eggs also deposited on the branches it 

 is diflBcult to comprehend how the race is carried on, as the leaves are 

 all fallen by the end of October and perish during the wdnter. The 

 (^ scale is remarkable for its form and great size, as well as for its 

 being larger than that of the $ , the converse of the latter being the 

 rule. In the spring of 1885 Mr. Saunders found on oak leaves of the 

 previous year, at Frant Wood, a few scales, which were probably of 

 this species, but being shrunk and empty, nothing could be made of 

 them. Frauenfeld first discovered the scales of his A. zonatus (but only 

 the (J) extremely abundant on the leaves of Quercus wiow^a«a, Willd., 

 an American oak growing in the Botanic Garden at Vienna, and it is 

 therefore curious that this Aspidiotus is not enumerated by Comstock 

 among the American species known to him. It is new to the British 

 Hst. 



Aspidiotus neeii, Bouche. 



Scales flat, white or yellowish-white ; 9 when adult 2 mm. in diameter, circular, 

 when immature with a more irregiilar outline ; the larval exuTiro nearly central, 

 yellowish : $ smaller, elongate, oval. <J imago yellow, mottled with orange-brown, 

 I have not seen. 



