128 THE CANADIAN ENTOMOLOGIST. 



^^2.) Exuvise strongly contrasting. 



(a.) Scale grayish-white or greenish, , . . . = cacti, Comst. 

 (b.) Scale pale yellowish-brown, . , . . = opimticola, Newst. 

 The mut. opunticola is from Demerara. 



I quite expect that D. cacti will itself prove to be a synonym of D. 

 calyptroides, Costa. The colour character given by Comstock will not 

 hold, as I found D. cacti v. opuntix had the ? sometimes (in February) 

 orange, sometimes pale yellow. The other characters, of the grouped 

 glands, are surely also variable. 



(3.) Aspidiotus fimbriatus, (Maskell). Syn. Diaspis (?) fitnbriata, 

 Maskell, Trans. N. Z. Inst., 1892 [publ. 1893], p. 208. Found on 

 Eugenia in Australia by Mr. Koebele. 



Mr. Maskell has kindly sent me specimens, and I am convinced that 

 the species belongs to Aspidiotus, and in that genus to the group of ^. 

 nerii, destructor, &c. This reference is borne out by the scale, and also 

 by the terminal portion of the female, which is quite unlike that of any 

 Diaspis known to me. The somewhat elongate form of the female is not 

 of any generic significance, or at all events, cannot be considered to out- 

 weigh the structural characters of the terminal portion, which are entirely 

 those of an Aspidiotus. Unfortunately th; male scale is unknown. 



(4.) Aspidiotus dictyospermi, Morgan. There is an Aspidiotus which 

 I found on Cjcas at King's House, Jamaica, and Mr. Campbell found 

 abundantly on stems of rose at Castleton Gardens in the same island, that 

 is apparently identical with Morgan's dictyospermi. The scales look like 

 those of A. auratitii, but the shape of the female is as in the majority of 

 the genus, which will distinguish it at once from either aurantii or ar- 

 ticulatus. 



The colour of the ? is pale yellow. 



The terminal portion of the ? agrees well with dictyospermi. There 

 are three pairs of lobes, the middle pair much largest, and notched with- 

 out, the second also notched, the third very small. Between the lobes 

 are scaly plates. Cephalad of the third lobe, the margin presents a pair 

 of elongated plates, though not so long as in Morgan's figure of dictyo- 

 spermi. Beyond these are two small plates. There are conspicuous 

 elongated sacs near the bases of the lobes, somewhat after the manner of 

 A. fnifuosos and A. smilacis. The anterior lateral groups of glands are of 

 about three each, the posterior lateral of two. 



The scale is red-brown, with covered exuviae to one side of the centre, 



