734 TINEINA [LITHOCOLLETIS 



Forewings : Ib simple, 3-5 absent, 7 to costa, 8 absent, 10 

 absent. Hind wings J, linear -lanceolate, cilia 4-5 ; transverse 

 vein absent between 2 and 5, 3 absent, 4 absent, 6 absent. 



A large genus, principally European, represented less freely 

 in other parts of the Northern hemisphere, and in Australia by 

 a single species. The species are often very closely related 



together and hard to discrimin- 

 ate, and it is possible that closer 

 study may modify our views on 

 the limits of some of them ; ex- 

 periments should be made to 

 test the direct influence of food- 

 plants. Imago with forewings 

 lanceolate ; in repose sitting with 

 forepart somewhat raised. Larva 

 stout anteriorly, usually with a 



Neurationandh^ad^of^^ocoWeto yellow Or orange spot on 9, 



without prolegs on 10, mining in 



leaves, seldom in bark of shoots ; the mine is a small blotch, of 

 which one surface is silk-lined and caused to contract, thus 

 producing a hollow chamber ; the contracting surface may be 

 either on the upper or under side of the leaf, but is always 

 constant in the same species. Pupa within the mine, with or 

 without a cocoon. 



1. Ground-colour of forewings clear shining white . 2. 



not clear white . 7. 



2. Forewings with two or more angulated fasciae . 3. 



without two fasciae . . .4. 



3. Last fascia straight . . .4. sylvella. 



,, angulated . . .3. hortella. 



4. Forewings with an oblique fascia from base of costa 



1. roboris. 

 without such fascia . . .5. 



5. Forewings with fuscous median line from base 7. heegeriella. 



without basal line . . .6. 



6. Forewings with four costal and three dorsal strigulae 



6. tenella. 

 ,, three costal and two dorsal strigulae 



5. cramerella. 



7. Forewings white, irrorated with fuscous, with dark 



bars . . .45. comparella. 



more or less ochreous, with pale 



markings . . . .8 



