20 



body ; but tbese are wantinf^ in several anomalous genera that have 

 been assigned to this subfamily. The antennae (when present) 

 have never more than seven joints, and the terminal joint is rela- 

 tively short. 



The typical genus, Eriocncnis,\s characterised by the mature female 

 insect being completely enclosed within a closely felted sac. The 

 posterior lobes of the body are well developed, and conical spines are 

 usually present on at least some part of the body. 



E. deroiiiensi!^ (Green). On Erica tetrali.v, causing distortion and 

 convolution of the stems at the point of attachment. Sac 

 white, subglobular. Insect orange-yellow; the dorsum thickly 

 set with stout spines. 



E. insii/nis, Newstead (fig. 8 c). On grasses. Sac white ; elongate, 

 narrow ; surface relatively smooth. Body of insect with a 

 continuous marginal fringe of spines. 



i^./yrfen/, Newstead (fig. 8 b). On grasses. The sacs, which are often 

 attached to dead bracken and fallen leaves, are usually more 

 ovate than those of insi</nis and, in fresh examples, exhibit 

 numerous erect filaments. Dorsum of the insect with 

 numerous spines. 



E. pseiiduisiiinis, Green. On grasses. Sac pale ochreous, elongate. 

 Body of insect with scattered spines on the frons and median 

 area of thorax in addition to the marginal fringe of spines. 



E. glyceriae, Green. On the underground stems and rhizomes of 

 Glyceria niaritinia. Sac whitish ; broadly ovate. Colour of 

 insect rose-red. Spines few, confined to the margins of the 

 abdominal segments. 



E. inerniis, Green (fig. 8 a). On Eestuca ovi)w. Sac small, hammock- 

 shaped, creamy-white ; surface smooth. Body of insect 

 devoid of spines, except on the posterior lobes. 



E. placidiis, Green. On liracJn/podiinn si/lvaticmu. Sac relatively 

 large ; ochreous or whitish ; surface woolly. Body of insect 

 without spines, except on the frons and posterior lobes. 



The genus Gonfii/paria difi'ers from Eriorocciat in the covering sac 

 being incomplete, leaving the greater part of the dorsum of the 

 insect exposed. Posterior lobes strongly developed. 



G. spuria (Modeer) (fig. 8^/). On the stems and branches of various 

 species of Ulvms. At present recorded only from a few 

 nursery gardens. Insect chocolate-brown, lying within what 

 might be described as a fringed calyx of whitish felted 

 secretion. 



In the genus Eonscolondna the mature female is enclosed within 

 a cylindrical ovisac. Body without prominent lobes or spines. 



