1917.] 209 



orifice and in a medio-longitudinal series on tbe dorsum. Anal cleft short, 

 about one-teuth the length of the body. The whole dorsum is thrown into 

 delicate transverse folds, and the median area of the venter has a roughened 

 sliagreen-like surface. There are sparsely scattered pores and minute setae on 

 the dorsum, but there are no specialized marginal hairs or spines, and no stig- 

 matic spines. 



Length 375-4'0, breadth 2-3 mm. ; average of nine examples 4x242 mm. 



Newly hatched larva elongate-ovate ; pinkish ochreous. Antenna 

 6-jointed. Abdomen (fig. 4,/) with a marginal series of what at first appear 

 to be large ring-shaped pores, but which, when a iewed in profile, are seen to 

 consist of an aculeate cupula-shaped spine on a ring-shaped base. Margin of 

 thorax (tig. 4, //) with groups of large circular pores which vary in number and 

 position. Posterior extremity with prominent rounded lobes (each bearing a 

 long seta) which differ in form and structure from the same, parts in most 

 Lecaniid larvae. 



Length OS mm. 



This new species was first brought to my notice by Mr. E. A. 

 Butler, who swept it from grass, at Royston Heath, Herts, on Whit 

 Monday (May 28th, 1917). Mi*. Butler reports that the insects seemed 

 to be fairly common on one part of the heath. He remarks that, 

 although he has swept over the same part of the heath on many 

 previous AVhit Mondays, lie has nev^er noticed the insect before. These 

 examples, though apparently adult, Avere not quite fully grown. 



Subsequently, on June 22ncl of the same year. Professor Newstead 

 and I discovered fully mature examples, with ovisacs, at Camberley. 

 The ovisacs, which are of a loose silky composition and of a more or less 

 globular form, were full of rosy-pink eggs, each measuring 0"4 mm. in 

 length. The parent insects remained attached to the ovisacs, partly 

 entangled in the structure ; they were mostly dead — distended by the 

 attacks of Chaleid parasites, which subsequently emerged in considerable 

 numbers. The ovisacs were found low down at the base of the tufts of 

 grass, usually underneath a growth of moss that covers the ground 

 between the plants. Young larvae commenced to emerge on July 5th. 



It is probable, from the circumstances of their discovery, that the 

 insects — for a short period before oviposition — ascend towards the top 

 of the plants. The fact that they had not been observed by Mr. Butler, 

 on his previous visits to the locality, may perhaps be accounted for by 

 such visits not having exactly coincided with this period. I have much 

 pleasure in naming this interesting species after its original discoverer. 



Pdrafairmairia fjracilis Green. 

 Examples taken on July 14th of the ])rescnt year bad only just 

 commenced the .secretion of the covering scale, which was still quite 



