of the Genus Lithocolletis. clxxi 



cimens it has a dark margin towards the costa. The first costal 

 streak has a faintly indicated darker margin on the side towards 

 the base of the wing, and hardly reaches half across the wing ; 

 the first dorsal spot has also only faint indications of a dark 

 margin towards the base; the second pair of spots have distinct 

 dark margins towards the base of the wing : the apical black 

 streak is longish-oval, the last costal streak coming nearly to the 

 middle of it, and not nnfrequently white scales are continued 

 along it from the costal streak. 

 On blackthorn, at the end of July and beginning of August; the 

 larva mines the under side of the leaves of the blackthorn, and forms 

 a fold in a longitudinal direction, the upper epidermis having a mot- 

 tled green and white appearance. They may be obtained in the pupa 

 state in the middle of July, and towards the end of the month the per- 

 fect insect appears. 



6. L. ulmifoliella. The continental specimens of this species are 

 much paler than ours ; but as the markings appear identical, it is to 

 be presumed that it is merely a variation of the same species induced 

 by climate. 



7. L. capreella, Wocke. This appears to be the Salicicolella of 

 Sircom, which is a species subject to great variations. Its main cha- 

 racters are the unmargined, slender, basal streak, slightly curved up- 

 wards at its extremity, and the dark scales on the disk of the wing, 

 between the second pair of opposite spots. The intensity of the 

 ground colour varies exceedingly, and the colour of the spots is not 

 always white, being sometimes pale yellowish, which gives the insect 

 at first sight a totally different appearance. 



I have collected the pupae in October and November, and bred the 

 perfect insect in February and March. 



8. L. quercifoliella mines the oak-leaves in regular oval patches, 

 and spins up its excrement on the outside of its cocoon, as also does 

 Cramerella. 



9. L. connexella. The difference mentioned by Von Nicelli be- 

 tween the spring and summer broods, has again made me doubt whe- 

 ther our Viminiella may not be a form of this species. Viminiella I 

 have bred in February, from pupae collected in October and Novem- 

 ber on sallows ; but, according to Von Nicelli, L. connexella should 

 occur only on the smooth-leaved willows. 



10. L. tenella frequents the hornbeam (Carpinns Betulus) in May 

 (and August ?). The mode of feeding of the larvae is yet unknown to 

 me. There is a suffused variety of it which, seen by itself, might 



