HAIR-TUFTS AND ANDROCONIA IN EUSTROMA RETICULATA. 5 



Magazine ; this name therefore can have no application to the American 

 species. 



Hiibner in the Tentamen (1810 ?) gave the same species as the type 

 of his genus Limnas ; in the Verzeichniss (1816), the family Ferruginece 

 of the stirps Limnades is divided into two genera, (1) Eupl(xa, including 

 plexippe, chrysippe, &c , (2) Anosia, including menippe which we have 

 already seen to be synonymous in Hiibner's mind with archippus, Fb. 

 He uses Anosia as the generic name for the American insect, when 

 later he figures it under the trivial name megalippe. It is not sur- 

 prising, considering the political history of the time, that Hiibner 

 should show no sign of any acquaintance with Latreille's works. 



The name Anosia seems therefore clearly marked out as the right 

 generic designation of archippus, and the graceful alliteration of Anosia 

 archippus will furnish the full answer to the question with which we 

 started. 



fiair-tufts and ^Iiidrocoriia in Eustroma reticulata. 



By T. a. chapman, M.D., F.E.S. 

 Bead before the Cambridge Entmnological Society, Dec. 1st, 1893. 



Mr. Farren has called my attention to a tuft or brush of hairs on 

 the fore- wings of Cidaria reticulata, and has afforded me the opportunity 

 of examining a specimen — I fear to its considerable injury ; I have 

 since obtained some additional material from Mr. Hodgkinson. 



The precise disposition and relations of this brush were quite new 

 to me, but, as I knew very little about the matter beyond the fact that 

 such brushes occur in various situations (legs, wings, body, &g.), I 

 referred to Mr. Meyrick's paper, Trans. Ent. Soc. Lond., March, 1892, 

 which contains an immense fund of information relative to the external 

 structural anatomy of the Geometr^e. From this source I gather that 

 such brushes are rarely found on the fore- wings of Geometers. 



Mr. Meyrick places reticidata in the genus Eustroma, Hb., one of 

 the characters of which he thus describes : — " Fore- wings in ^ with 

 strong hair pencil lying near inner margin from base beneath, some- 

 times partially clothing lb." The other species of this genus which 

 I have examined are prunata, associata, populata, testata ; the description 

 is fairly applicable to them, the tuft forming a dense pencil which 

 arises in mass from near the base of lb, its root sometimes extending 

 along a portion of that nervure, and which (in cabinet specimens) lies in 

 the form of a dense brush nearly parallel with the neuration. C. reticidata 

 does not agree at all with the above-mentioned species ; it comes nearer, 

 perhaps, to the genus Lasiogma, Meyr., in which the hairs spring from 

 the whole length of the submedian fold. I have had no opjDortunity 

 of examining the species comprised in this genus ; it may, therefore, be 

 worth while describing the arrangement which obtains in reticulata, 

 although it seems improbable that this has not been done already. 



In popidata, which may be taken as a type of the other species 

 that I have examined, the hairs arise from a triangular area, situated 

 on the costal side of nervure lb. almost at its extreme base, between 

 this nervure and the nervure above. In reticidata, the area from which 

 the hairs arise is situated between lb. and the inner margin ; it is 

 quadrangular in shape, its basal margin being rather farther from the 

 base of the wing than is the apical margin of the area (on the costal 



