191^1.] 119 



AfJiero/'des hirfellus Halid. 



Through the kindness of Prof. F. V. Theobald, I have been able to 

 see both apterous and alate specimens of this species. I also found it in 

 abundance on Aira caespifosa at Monymusk, Aberdeenshire, in August 

 1920. The apterous examples were plentiful, and were to be found 

 between the ribs of the leaf, upon which they left a brown, linear stain 

 after they had been feeding for some time. The viviparous mother drops 

 a larva, and then moves forward a little way to give birth to another, so 

 that after a time a long row of 3'oung is to be found nestling between the 

 ribs of the leaf, the mother at the head, and the oldest of the young at 

 the tail. The young differ considerably from the dense black, glistening- 

 adults in having the dorsum broken up into large squarish black areas 

 bounded by green. 



SqjJui schoutedeni Del Guerc. 



Apliis ghjceriae Walker, Ann. & Mag. Nat. Hist. (2) ii, 184S, 

 p. 43. 



It would appear from Del Guercio's Monograph on the Genus Sipha 

 (Kedia, ii, 1904, p. 132) that 8. glyceriae Kaltenbach differs from his 

 8. schoutedeni in that the cuticle of the latter is completely "spinulose, 

 but that the two species resemble each other closely in coloration. As 

 Walker's *S'. (jJijceriae has the cuticle completely spinulose, and is other- 

 wise inseparable from 8. schoutedeni, it should be known by that name, 

 provided that Kaltenbach's species has been correctl}^ determined on the 

 Continent. Amongst a long series of apterous viviparous females are 

 several apterous males. My colleague, the Rev. J. Waterston, found 

 this species at Catacol, Arran, September 1920, Mr. H. Donisthorpe took 

 it at Putney in November, and Mr. G. C. Champion has captured an 

 example at Wisley, Surrey. 



Sipha Uttoralis (Walker) (fig. 1, D, E). 



Aphis Uttoralis Walker, Ann. & Mag. Nat. Hist. (2) ii, 1S4S, p. 44. 



Apie7-uu$ Tiviparous Female. — Ovate, "rather flat, darlc green, sometimes, 

 but very rarely, pale green, not hairy nor bristly, but clothed with a white, 

 velvet-like down" {Walker). Antennae yellow, black towards the tip, 

 5-segmented, segments I and H equal, HI twice the length of II, IV one-third 

 the length of III, with a rather large, primary seusorium at distal end, V base 

 twice the length of IV, spur just about equal to the leugth of the base, with two 

 short, strong sjiiues at the tip, s])ur distinctly imbricated, priuuiry seusoriuui 

 large, compound. Total length •4:4mm. {i.e. just reaching the hind margin of 

 the prothorax), the proportions of the segments being 15, 15, 28, 10, L'O+'JO. 



