NOTES ON CEMIOSTOMA WAIMiSKLLA IN SUSSl'X. 



203 



Genista tinctoria is in profusion. Almost the Ihvst thing we foiind 

 there were the cases of Colt'op/mra viblceUa. In searching for these a 

 few cases of C. aatnratella var. tinctoriella were discovered, but only 

 two of these were bred, as the same parasites that decimated the 

 vibirella had attacked them. These cases are of the same construction 

 as those that are attached to broom, but are very light brown instead 

 of being bkckish. From a pupa tai\en off this plant the suffused form 

 of Depre.ssaria cotitosa was bred, but with one exception, to be mentioned 

 below, we did not discover any of the other species that feed exclusively 

 on (t. tinctoria. The most conspicuous Tortrix seen on the common 

 was Eacosina rivulana {conchana), a good series might have been taken. 

 It was very lively but only remained on the wing a short time. In 

 some spots Achillea jitaiiiiica grows rather freely ; among this 1 took 

 one Heiiiiiiioie, it may or may not be the local species which is attached 

 to this plant. Several Aiicylis biarcnana were seen flying over dwarf 

 sallow in the afternoon sunshine, and from mines off the same plant 

 Lithoculletis quinqneguttella was bred. These underside mines curl up 

 the small leaves longitudinally so that the margins meet. A few 

 Anarsia spartiella were boxed and one Ochsenheimeria mediopectinella 

 (birdella) was first seen on the wing and afterwards also boxed, all my 

 previous captures of this species were made when the insects were at 

 rest either on herbage or the trunks of trees. There is nearly always 

 a breeze blowing over this common which is pleasant, but it may 

 partly account for the general paucity of Lepidoptera, other than those 

 mentioned, which was noticeable, at any rate, this year. 



Here on June 10th we found some mines of L'emio^tutita ivailesella 

 and also the empty ovum shell. The ovum is lozenge-shaped and laid 

 singly on the underside of the leaves of G. tinctoria away from the 

 ribs. The larva passing through the leaf forms a small black roundish 

 spot under the upper cuticle, then mines a slender thread like track 

 for a short distance, at the end of which it makes a much larger round 

 blackish blotch, and finally a paler ovoid patch. 'J he larva itself is 

 extremely like that of 0. labutnella. The cocoon is spun on the under- 

 side of a leaf, which is somewhat curved by the strain of the silk. 

 The larva first spins two walls of white silk, one' slightly higher than 

 the other, afterwards the real cocoon is spun between the walls at the 

 base of one of them. It will *be seen from the description that the 

 ovum, the peculiar mine, the larva and the curious cocoon are exactly 

 like those of labuniella.'^ Stainton mentions the mine in the Annual. 

 I have compared the cocoons of the two species side by side, and the 

 only difference seems to be that those of icailesella are smaller, and its 

 mines are distinctly of less extent than those of labiirnella. The two- 

 species, as I think they are, must certainly be extremely closely allied. 

 I bred a pair of ivailesella on the same day and they paired. After- 

 wards I put some laburnum leaves in the box, but no ova were 

 laid. A few days later I put in some fresh leaves, on these at least 20 

 ova were deposited before the moth died. The result of this 

 experiment seems to show that the moth only used the leaves from 

 necessity, otherwise, I think, she would have laid on the leaves first 

 supplied. The imagines appear to be also smaller, but of the same 

 whiteness as those of lahumella. The markings of the forewing vary 



* Compare notes on G. lahumella in this Magazine, Vol. xxv., p. 182, &c. 



