VERTICAL DISTRIBUTION OF BRITISH LEPIDOPTERA. 37 



between type and variety are of frequent occurrence. E. ida, Esp. Fairly 

 common on the coast; rare in the mountainous districts; the females 

 appeared about a fortnight later than the males; the present year has been 

 a great one for ida ; first taken in Nice on June 29th ; I captured a speci- 

 men in our garden, on July 21st, having the apical pupilledspot on one of the 

 fore wings twice as small as that on the corresponding wing, similar to that 

 already described in the case of Satyrus arelhusa v. dentata. E. tlthonus, 

 L. Commoner than the last. 



C(vnon>jmpha dorus, Esp. Common on the rocky ground at St. Vallier; 

 rare at Caussols ; the first specimen was taken in the Val Obscur, Nice, on 

 July 4th; the spots are very variable, both in size and number. C. pani- 

 philus, L. Abundant everywhere. 



Spilothyrus alcece, Esp. Generally distributed ; this insect was taken as 

 late as October 21st, at Nice; ova and larvae, some of the latter being full- 

 fed, were found in large numbers on a mallow (probably Malva amhirjua) in 

 the mountains, at Caussols, on August 27th ; during October I found larvae, 

 but sparingly, at Nice, in the roUed-up leaves of a mallow in our garden, 

 and elsewhere. S. althece, Hiib. I have a specimen from the neighbourhood 

 of Nice, taken some years ago, and submitted to Dr. Staudinger, who certi- 

 fied it to be a typical althece; scarcer than the last. The variety bcEticiis, 

 Ram., of South-western Europe, I have not met with up to the present. 

 S. lavatercB, Esp. Common on the coast and in the mountains, up to an 

 elevation of about 3300 feet. 



Syrichthus carthami, Hlib. Very common in the mountains up to 3960 

 feet altitude, at Caussols ; I frequently met with it in little groups on damp 

 ground near water ; some of the females taken were deeply suffused with a 

 powdering of greenish grey. S. sao, Hiib. Common everywhere ; some 

 examples are very small. 



Niso)iiades tages, L. I took a very unicolorous specimen, for the first 

 time this year, at Nice, on July 4th. 



Hesperla thaumas, Hufn. Abundant. H. lineola, 0. Scarcer than the 

 last. H.actcDon, Esp. This year it was certainly the commonest "skipper" 

 to be seen; first captured at Nice, on June 29th. H. syhanus, Esp. 

 Common in glades; captured, for the first time, in the Vallon des Fleurs, 

 Nice, on July 1st. H. comma, L. Abundant. 



(Erratum: Entom. xxvi., p. 358, line 18, for "3795 feet," &c., read 

 " 3960 feet," &c.) 



Nice, France, November, 1893. 



ON THE VERTICAL DISTRIBUTION OF THE BRITISH 



LEPIDOPTERA. 



By W. Harcourt Bath. 



(Concluded from p. 6.) 



The following table shows the relative heights of each vertical 

 zone in each of the various latitudes in the British Isles, with 

 the chief elevated tracts contained in them, after allowing a 

 license of half a degree of latitude each way. I have also shown 

 what would be the mean annual temperature of each locality 



