258 THE ENTOMOLOGIST. 



form as Spilosoma zatima, and also a modification in which the 

 ground colour is pale buff, and the black bordering of the neura- 

 tion is narrow and restricted to the outer marginal area. Another 

 modification of the zatima form, but in the opposite direction, is 

 the example figured by Depuiset as var. deschangei (A.nn. Soc. 

 Ent. Fr. 1886, pi. iv. fig. 4). In this all the wings are fuliginous 

 on both surfaces, and the neuration is pale buff, as also are the 

 head, tborax, and tip of abdomen. 



Bomhyx radiatus, Haworth, Trans. Ent. Soc. i. p. 336 (1812), 

 = Spilosoma radiata, Stephens, 111. Brit. Ent. Haust. ii. p. 77 

 (1828), as figured by Westwood and Humphreys, Brit. Moths, 

 pi. xviii. fig. 19 (1843), is certainly only a slight modification of 

 zatima as figured by Cramer. The specimen was taken in York- 

 shire. Another example is figured in the ' Entomologist ' for 

 1874, but the locality from which it came is not mentioned. 

 Mr. Carrington (Entom. xxiii. p. 207) is reported to have stated, 

 at a meeting of the South London Entom. and Nat. Hist. Society, 

 that, between the years 1860 and 1870, S . luhricipeda yslt, radiata 

 " only occurred in a timber-yard close to the railway station at 

 York ; he had recently visited the neighbourhood, and was 

 interested to find that although the timber-yard had been taken 

 by the railway company, the variety now occurred in fair numbers 

 throughout the whole district." In a most instructive paper on 

 " The ' Radiated' Varieties in the genus Arctia," &c., Mr. Porritt 

 (the 'Naturalist,' 1889, p. 233) remarks of Spilosoma {Arctia) 

 luhricipeda var. radiata : " The form is not at all uncommon 

 about York, and all the collections of that city contain it. That 

 of the late Mr. T. H. Allis, now in the York Museum, contains a 

 long series of it ; and another collector in York, less than a year 

 ago, showed me in his boxes, I should say, quite two hundred 

 specimens, all bred from larvae collected, when nearly full-grown, 

 from the gardens, &c., in York. The variety also occurs in other 

 parts of the county as well, but York appears to be its head- 

 quarters." 



_: . An important addition to the above information concerning 

 the variety oi S. liibricipeda underconsideration, is Mr. TugweU's 

 account of his experiment in rearing the form from ova deposited 

 fey a female radiata, which had paired with a male of the same form 

 "(ante; p. 247). All the offspring, he tells us, emerged in April, and 

 were of the radiata form; and from these he again obtained a 

 paiiring, the larvae from which fed-up during May and June, and a 

 •portion of them had attained the imago state between July 8th and 

 18th. All the imagines of this second brood were of the radiata 

 form, and some of them appear, from Mr. TugweU's description, 

 to be referable to var. deschangei. It is exceedingly interesting 

 to find tkiat the range of variation of the Yorkshire radiata is 

 co-equal with that of the Heligoland zatima, and that in each 

 case the varieties are reproduced even when reared from the egg 



