EXPLANATION OF PLATE. 



1. Tinea subtilella, Fuchs. Discovered as a species new to Britain by 



Mrs. N. M. Richardson at Portland, August, 1890. Fourteen 

 specimens have altogether been taken in that month and August, 

 1891, by Mr. and Mrs. Richardson, and two by Rev. C. R. Dig by. 



2. Gelechia ocellatella, Sta. This pink variety was bred, together with 



others of the ordinary form, from larvae collected at Portland on 

 Beta maritima by Mr. N. M. Richardson, June 28th, 1890. 



3. Laverna lacteella, Sta. From specimens taken by Rev. O. P. 



Cambridge at Bloxworth, and by Mr. N. M. Richardson at 

 Whatcombe, near Blandford ; Mr. E. R. Bankes has also bred 

 this species from larvae collected by him at Bloxworth all in 1890. 



4. Tinagma betulce, Wood. From a specimen taken at Bloxworth by 



Rev. O. P. Cambridge in July, 1887. The mines of this species 

 have also been observed at Whatcombe by Mr. N. M. Richardson, 

 and the perfect insect was taken in some abundance at Bloxworth 

 in June, July, and August, 1891, by Messrs. O. P. Cambridge, 

 N. M. Richardson, and E. R. Bankes; and most probably it 

 occurs elsewhere in the county amongst birch. 



The life history of this species was worked out by Dr. Wood, in 

 Worcestershire, from the slight clue afforded by the holes in 

 the birch leaves, and the moth, which was thus discovered, 

 was described as new to science in October, 1890 (E.M.M. 

 xxvi., 261). The egg is probably laid on the outside or in the 

 substance of a young shoot of birch. The larva, when hatched, 

 mines upwards in the birch twig, and in the late summer, 

 when almost full-fed, turns off into a leaf stalk, through which it 

 proceeds into the substance of the leaf. Having mined into it a 

 short distance, it cuts out from the upper and under cuticles 

 corresponding oval pieces (fig. 4a), which it lines with silk, closing 

 them together except at one end, so as to form a sort of bag-like 

 case. Carrying this on its back, it descends from the birch tree, 

 and, having found a convenient resting place, fastens up the mouth 

 of its case and turns therein to a pupa, from which the perfect 

 insect emerges in the following summer. 



Fig. 4a represents the biich leaf after the larva has left it. It now 

 appears that the work of the larva had been observed in 1885 near 

 Hamburg by Dr. Sorhagen, who proposed for the moth (not then 

 known) the name of Heliozela Hammoniella. A very full and 

 interesting description of the larva and its habits is given by 

 Dr. Wood in Entom. Monthly Mag. xxvi., 261. (See also 

 E.M.M. xxvii., 48, 299, and Stettin Entom. Zeitung, 1891, p. 133.) 



