646 Mr. A. R. Wallace's Catalogue 



the middle ; legs very long, the anterior tibise nearly as 

 in Ohalcothea, the posterior tibiae of the male dilated, and 

 with a large curved spur on the inner edge, near the 

 apex ; sternum flat, its median process short, truncate, 

 and slightly rounded. 



This genus differs from Chalcothea in the form of the 

 thorax and elytra, and in the remarkably spurred hind 

 tibiae of the males. 



1. Plecteone nigroc^rulea, Waterhouse. 



Macronota nigroccerulea, Waterh. Proc. Ent. Soc. 1841, 



p. 27, 9. 



Chalcothea Barrotiana, Burm. Handb. iii. p. 319, $ . 



Hah. — Philippine Islands (Coll. Parry, B. M.) . 



A male from the Philippines, in the collection of Major 

 Parry, agrees with Burmeister's description, but the 

 impression of the elytra is not striated, and the whole 

 surface is exceedingly smooth and glossy. Mr. Water- 

 house's type specimen in the British Museum is blue- 

 black, but otherwise agrees in form and all other details. 

 This species has the thorax almost as distinctly sulcate 

 as in Chalcothea. 



Length 13 1 lines. 



2. Plecteone tkistis, Westwood. (PI. XIII. fig. 1). 

 Macronota tristis, Westw. Arc. Ent. i. p. 104, pi. 28. f. 5. 

 Hah. — Java (B.M. ? ) ; Penang (Coll. Lamb, c? ^ ? ) • 



This species varies from brassy-green to blue-black. 

 The male has the hind tibiae much dilated, and armed 

 with a short spur almost the shape of a ploughshare ', 

 and in this sex the clypeus is dilated in front and almost 

 entire. In other respects Mr. Westwood's description 

 is very accurate. The nearly flat thorax, the striated 

 impression on the elytra, the entire surface slightly 

 roughened with minute punctures, and the different form 

 of the spur, distinctly separate this species from its 

 Philippine ally. 



Length 16 lines. 



Gen. VIII. Chalcothea, Burmeister. 



The species of this beautiful group were generally 

 found flying near the ground, in the sunshine, and set- 



