In distinguishing Thecla from Lycaena, I must confine my- 

 self to the British species ; and for the exotic forms I would 

 refer the student to Dr. Horsfield's valuable remarks and 

 beautiful illustrations in his descriptive Catalogue of Indian 

 Lepidoptera. The sombre tints of the upper side of the wings 

 and the plainer under sides, characterize our genus Thecla ; 

 and the inferior wings with one exception have caudal ap- 

 pendages ; the antennae are shorter, with less abrupt and di- 

 lated clubs than in Lycaena; the terminal joint of the palpi 

 (at least in the types) is also shorter in Thecla, and the eyes 

 are pubescent. 



The following Insects may be recorded as British. 



1. T. Betulae Linn.— Don. 7. 250. 



Found in Woods the middle of August, at Coombe, Birch, 

 and Darent; it has also been taken in Morfolk, Suffolk, Dorset, 

 Devon, &c. 



2. T. Quercus Linn. — Don. 13. 460. 



Found the middle of July, in the same districts as the last, 

 but more frequently. 



3. T. Pruni Linn. — Curt. Brit. Ent. pi. 264. 



This insect was so totally unknown to the entomologists of 

 Britain until lately, that the following species has constantly 

 been described as the T. Pruni. It was, however, taken last 

 July, in Yorkshire, by Mr. Seaman, in such abundance, that 

 it is now to be seen in almost every Cabinet. I am indebted 

 to Mr. Davis for first calling my attention to the subject, as 

 well as for the example figured, which he purchased at Ips- 

 wich. The Plant, Caterpillar, and Chrysalis are copied from 

 Hiibner. 



4. T. W-album Hiih. Goda. — Pruni Ha'w. Steph. 



A rare insect until lately. Mr. F. Walker took it at South- 

 gate the end of June, on the Spiraea frutex ; it has also been 

 taken in profusion in Surrey, the middle of July. I once saw 

 a specimen taken near Bungay, Suffolk. 



5. T. Spini Stcph.—Fah. ? 



In Mr. Haworth's Cabinet is a specimen of Thecla ticketed 

 Spini?, which that gentleman informs me was purchased in an 

 old English Collection. He was always doubtful whether it 

 were the T. Spini ; as it does not agree with the figures of that 

 insect, any more than it does with Mr. Stephens's descrip- 

 tions. Mr. Sparshall possesses a specimen which he received 

 from some of his correspondents in town. 



6. T. Rubi Linn.— Don. 13. 443. 



This pretty insect is found on White thorn hedges and 

 brambles, from the beginning of May to the same period of 

 June, and again the early part of August. 



