LEPIDOPTEROLOGY.—-TWO NEW HUROPEAN LYCAENIDS. 25 
to enable all entomologists to recognise to what forms the names he 
gives to Actinote not hitherto figured apply. 
_ Then follows 250 pp. of Monsieur F. le Cerf’s Contributions a V 
Etude des Aigeriidae. ** Descriptions and figures of new or little known 
Species and Forms.’’ This is accompanied by seven plates with sixty- 
four figures. M. Oberthtr gives a preface to this important paper, a 
preface in which he tells us that the A/yeriidae have been the object of 
no complete work, unless we so regard what we find in Dr. Boisduval’s 
Species général de Lépidoptéres Heteroceres, published in 1874. He gives 
us various personal reminiscences of the attraction the clearwingsalways 
have for the collector, and illustrations of how comparatively common 
some very rare species prove to be when we know their habits. Andre- 
neformis in Emgland is a case that occurs to us all in this connection. 
He relates his experiences of Sesia wroceriformis-armoricana in regard to 
its sembling and the alertness of its enemies. This species feeds in the 
roots of gorse, and, though a south Huropean form, occurs in Brittany 
and might perchance turn up in our south-western counties. 
There are also some notes on their mimetism, remarkably illus- 
trated by Pl. celxxx., with Triscotia rubiginosa, a Javan wasp, closely 
resembled by a Javan Sesta, Sura ignicauda, and by an Indian species, 
Trilochana scolioides, and an even more close mimicry of T’riscotia 
procer by Trilochana oberthiiri, both from Java, in which the dark wings 
and black body, with yellow patches, are much the same in the wasp 
and in the clearwing. M. Le Cerf’s paper is the first written contribu- 
tion to the subject in the Etudes, his activities having been delayed and 
hindered by war duties. There appeared, however, in Fasc. xi., 8 plates 
with 82 figures, of species from Barbary, and 9 plates in Fase. xii., 
presenting exotic species. ‘These, with the seven plates in the present 
part, are all drawn by M. Culot in his usual masterly manner, and are 
nearly all from specimens in M. Oberthiir’s collection. M. le Certf’s 
introduction refers to various difficulties that meet the students of this 
family, and finds many of them can only be met by insisting on all 
descriptions of species being accompanied by a good figure, and by 
giving, as he does, certain text figures to elucidate special details. He 
says that figures and descriptions of Ageriidae require the underside 
of body and legs to be noted as well as the upper surface. There are 
text figures to give details, with names of the various parts of the sur- 
face anatomy. M. le Cerf proposes to publish a series of papers and 
detached notes, to be called Contributions to the study of Atgertidae, on 
the Systematics, the Morphology, the Biology, etc., without professing 
at present to make it a complete work. 
The present paper deals with the exotic species figured in the present 
and the xiith Fascicules. 
We come again in Part iv. to Considerations about some species of 
Lycaena. ‘These refer chiefly to observations on the habits of Lycaena 
alcon and Plebeius argus var. armoricana, to which M. Oberthir and 
Mr. Powell devoted much careful attention last summer, in which they 
were assisted by the sharp eyes of M. Oberthiir’s grandson, M. Hervé 
Oberthtr. Mr. Powell’s detailed notes on L. alcon extend to 17 pp. 
The point of departure was that the life history of alcon cannot be alto- 
gether different from that of L. arion, and that the larva was probably 
reared by ants in a similar way. This proved to be a correct surmise. 
M. Gillmer proved in 1907 that the larva of alcon feeds in the flowers 
