86 THE GROUP OF HYPERBOREUS. 



It feeds in company on the edges of the leaves of 

 Cratcegus oxyacantha, stretching and jerking the body 

 if alarmed. It is found in June and July. The 

 cocoon is single, elliptical, and is spun in the ground. 

 There is only one brood. 



The imago appears in May and June. In Scotland 

 it is not common, but seems to be tolerably abundant 

 in the South of England. 



Touch Hills, Stirling, Clydesdale, Worcester, Grlan- 

 ville's Wootton, Devonshire, Daren th Wood. 



Sweden (not common), Prussia (very rare), Harz, 

 Austria, Holland, Switzerland, France, Italy. 



VIII. THE GROUP OF HYPERBOREUS. 



Black. Mouth 9 anus, tibice, and tarsi white, or sordid 

 white, costa and stigma white. Antennae a little longer 

 than half the body, clypeus incised, cerci long, spurs 

 short, claws bifid. Head roughly punctured, mesonotum 

 and pleurce covered with fine scattered punctures ; body 

 covered with longish hair. 



The first two species of this group are readily known 

 by the long dense fuscous hair with which they are 

 covered ; the third species has the pubescence much 

 shorter, but otherwise agrees closely. They may 

 be known from the pallipes-group (which they resemble 

 in coloration) by their much less coarsely punctured 

 thorax, and emarginate clypeus. 



Synopsis of Species. 



1 (4) Head and thorax covered with longish pubescence. 



2 (3) Tegulas and edge of pronotum white ; hinder tarsi dirty white. 



Thomsoni. 



3 (2) Tegulae and edge of pronotum black ; hinder tarsi and apex of 



tibise black. Clibrichensis. 



4 (1) Head and thorax covered with short pubescence. Apicalis. 



