74 



[April, 



black. Abdomen pale yellow, extremity infuscated more or less ; the base beneath 

 with two black spots. Expanse of wings, 3 mm. 



Larva, adult (fig. 1). Shining pale yellow, broad oval, the margin not attached 



to the leaf of the food-plant, but 

 distinctly separated, thus the usual 

 waxen fimbriation is wanting ; the 

 marginal area rather wide, flat, 

 delicately rayed transversely, the 

 body of the insect adjoining is 

 abruptly and greatly raised ; the 

 head very broad and prominent ; 

 the segmentation, especially of the 

 abdomen, evident ; the body is 

 bordered next the marginal area by 

 a wide zone of transverse, strong, 

 slightly wavy, irregular striation : 

 the profile (fig. 2) shows above the 

 ^S- 1- ^^S- 2. anal orifice a projecting conical 



tubercle surmounted by a short hair ; and on the top of the abdominal segments a 

 row of six short, blunt tubercles, one on each segment. No hairs. Length, 1 mm. 



At the beginning of November last Mr. C. W. Dale sent six of the 

 adult insects recently taken from Spir(sa uhnaria in Dorsetshire, and 

 one larva found on the under-side of a leaf of the Spiraea, a plant not 

 hitherto known to nourish any Aleurodes. The imago differs, inter 

 alia, from all the species with a single spot on the wings, by having a 

 very broad head, and a conspicuous black line on the nervure within 

 the spot on the lower arm of the furcation on the wings ; this is most 

 observable on the under-side. The larva is unlike any of the species 

 with one dark spot on each wing of the imago, described or figured by 

 Signoret in his " Essai sur les Aleurodes ;" it resembles A. quercus only 

 in having no hairs, but differs essentially in being destitute of the 

 shagreening so conspicuous in that species, which Signoret particularly 

 notes under the term "po?^c^^<e ;" and the pointed ano-dorsal tubercle 

 is a peculiar and special character. The species appears to be un- 

 described, and to be very distinct. 



Mr. Dale also sent six specimens of an Aleurodes brushed out 

 of a low-growing elder bush {Sambucus nigra) in another locality 

 (Brighton), and which are not to be distinguished from those from 

 the Spiraea ; I apprehend they were merely sheltering there. 



I am indebted to Mr. Ernest F. Tugwell for the excellent and 

 accurate drawings here re-produced. 



153, Lewisham Koad, S.B. : 



December 6th, 1893. 



