84 THE ENTOMOLOGIST. 
Lithocolletis anderide. Eight specimens bred in May from birch- 
mines gathered in November preceding. 
L. ulmifoliella, The above 8 anderid@, and 150 of the present 
species, bred from 630 mines in birch-leaves. Swarms of ichneumons 
issued from the remainder. There does not appear to be any reliable 
external character by which to separate the mines of this and the pre- 
ceding species, notwithstanding the great distinctness of their respective 
perfect insects. 
L. lantanella, From 227 mines in leaves of Viburnum lantana 
I bred 18 moths and 130 ichneumons. The rest were mostly empty 
mines. No wonder this insect is rare (in my own experience, at least) 
in the perfect state. 
Cemiostoma lotella. Bred freely from mines in leaves of Lotus major 
by the road-side, but very local, being confined to a space of less than 
100 yards. 
Bucculatria cidariella. One specimen. 
B. frangulella. Abundant on buckthorn (R. frangula). 
Nepticula centifoliella. Bred from mines found on sweet briar at 
Portland. 
N. @neofasciella. Bred freely from mines in leaves of wild straw- 
berry gathered in November preceding. 
N. acetose. Bred from mines in leaves of Rumew acetosella found in 
Portland. 
Bohemannia quadrimaculella. Five specimens brushed from alder. 
Trifurcula atrifrontella. One beat from oak, in the same locality as 
the specimen recorded last year. 
Aciptilia paludum. The evenings in August last were so un- 
favourable in point of weather that it was impossible to work for this 
little plume; one specimen only was taken. 
Bloxworth, Dorset, February, 1892. 
“ASSEMBLING” IN LEPIDOPTERA. 
By Henry D. Sykes. 
In the ‘ Entomologist’ for 1891 (xxiv. 99), Mr. Perry Coste 
asks for a complete catalogue of all the species in which 
‘“‘assembling” has been observed. It seems to me that such 
a catalogue would be very useful for reference, and I think it 
would be a good idea for the correspondents of this magazine 
to record such species as have either come under their personal 
notice or that they have seen recorded occasionally in entomo- 
logical books or periodicals, more especially as no such list 
appears to have been hitherto published. 
The list of “assembling’’ species given below is not in any 
way intended as an exhaustive catalogue, but merely as a basis 
for the formation, and with a view to the compilation, of such a 
catalogue. It will be seen that, in my short list of seventeen 
species, each of the four great groups of the Macro-Lepidoptera 
