1910.] 225 



obviously a vokmtary one, not provoked by disturbance, but this 

 exceptional behaviour was perhaps due to the intense heat that pre- 

 vailed. Weavrrella is certainly double-brooded sometiines, and probably 

 always, in the south of England, appearing in May or early June, and 

 again in August or September, but no evidence is before me of the 

 existence of a second brood in Scotland. The imago was taken by 

 Scott at Rannoch, Perthshire, from mid-June to early July in former 

 years, and by myself at Aviemore, Inverness-shire, June 23rd — 

 July 3rd, 1908, and agam Jtme 21st— July 1st, 1909. 



Learning from Stgr. & Ebl., Cat., ii, p. 236, No. 4537 (1901), that 

 Strand had described, under the suggestive name " ab. semisjnlotella," 

 a form that he assigned to rusticella, I asked Mr. Durrant for a copy 

 of the original notice, and he kindly forwarded one, pointing oiit that 

 the reference, which should read " Ent. Nachtr., xxvi, pp. 225 — 226 

 (1900)," is incorrectly given by Eebel {I.e.). Strand only knew this 

 form, which he says is intermediate between rusticella. and its var. 

 spllotella, through a single individual taken by him at Vefsen, Norway, 

 on May 5th, 1899. He tells us that, while the ground-colour of the 

 fore- wings is identical with that of var. sjnlotella, the costa shows only 

 a pale spot (presumably as distinct from a blotch. — E. E. B.), and the 

 hind tarsi are unicolorous. Strand's remarks leave me in no doubt 

 that his rusticella ab. semispilotella is the same insect that was 

 described as iveaverella by Scott forty-two years previously, but 

 although, in the solitary specimen before Strand, the hind tarsi were 

 unicolorous, as is occasionally the case, these parts are, as in rusticella, 

 dark-barred above, as a rule, sometimes broadly and conspicuously so. 

 Strand seems clearly to imply that the hind tarsi of B. spilotella are 

 not imicolorous, but they certainly are so in the individuals examined 

 by me, and Rebel (I.e.) specially says of spilotella, " tarsis postic. 

 unicoloribus.'" A specimen in the Walsingham collection (14332), 

 taken at Fagernes, also in Norway, by the Rev. A. E. Eaton on 

 July 11th, 1902, is certainly iveaverella: before I saw it, it had ah-eady 

 been identified as " Monopis rusticella, ■ Hb., + weaverella, Scott 

 (= semispilotella. Strand)," by Mr. Durrant, who, with Lord 

 Walsingham, has hitherto regarded weaverella as a form of rusticella, 

 Hb., but striicturally distinct from spilotella, Tgstr., and hiflavi- 

 maculella., Clms. 



