1879.] 53 



Abdomen bright green, genitalia bright green, genital plate broad 

 at the base, which is about equal to the height, posterior margin convex, 

 recurving just before reaching the apex, which is narrow, processes 

 about twice as high as broad at the base, inner margin rounded o:ffi at 

 the apex, which is narrowly black. 



Head — crown black, about one-half broader between the eyes than the length down 

 the centre ; posterior margin concave ; face-lobes black, triangular, shorter than 

 the crown, apex acute, inner margin slightly convex, divei'gence moderate, not 

 so great as the base of either. Antennce white, 1st joint black, 2ud brownish, 

 and from about the 6th to 10th black. 



Thorax — -fro- and meso-notum black, shining, scutellum of the latter with a yellowish- 

 white transverse band at the base. ILlytra clear, transparent, length about 21 

 times that of the breadth, nerves fine, pale at the base, somewhat darker towards 

 and at the apex ; costal margin convex, forming a continuous curve from base 

 to apex, the latter somewhat acute ; dorsal margin slightly convex, before the 

 apex of the clavus a short, more or less distinct, narrow, fuscous streak ; radial 

 cell lanceolate, terminating in the costal margin at a little more than its own 

 length from the apex, radial portion of the costal margin measured on the latter 

 very little shorter than the basal costal cell portion measured in a similar 

 manner ; upper arm of the cubitus throughout its length almost parallel with 

 the costal margin ; distance between the apices of the nerves of the 1st mar- 

 ginal cell about equal to that between those of the cubital piece of the marginal 

 nerve. Sternum white. Legs white ; tibics : fringe at the apex of the 3rd pair 

 black ; tarsi : 2nd joint more or less dark brown ; claivs black. 



Abdomen bright green, genitalia bright green, genital plate broad at the base, which 



is about equal to the height, posterior margin convex, recurving just before 



reaching the apex, which is narrow, processes about twice as high as broad at 



the base, inner margin rounded off at the apex, which is narrowly black. 



Length, I5 line. 

 Newly perfected examples are almost entirely pale. 



This insect is attached to Atrijplex patula, and, in its earlier stages, 

 does considerable damage to the plants by its attacks iipon the leaves, 

 which it deforms at the margins longitudinally, causing them to thicken 

 and recurve, whereby a chamber is formed in which it lives. The 

 larvcB are pale, with a very slight greenish tint. Head convex in front. 

 Eyes purplish-red, apex of the antennce black ; the whole insect has a 

 thick fringe of shining white hairs, longest round the abdomen. The 

 nymphs are very similar in appearance to those of the stage described 

 above. From the similarity in the deformation of the leaves to that 

 caused by Aphis afrijjlicis, Walker, which infests the plants at the 

 same time, it requires considerable patience when searching for this 



