354 HYMENOPTERA. 



A]Ms leucothorax, De Geer, Mem. iii. 573. 4. t. 28. f. 7- 

 Bo'.ubus sestuans, Fabr. Syst. Fiez. p. 351. 44. 

 Xylocopa sestuans, St. Farg. Hym. ii. 193. 36. 

 Xylocopa pubescens. Spin. {Klug, MSS.) Ann. Soc. Ent. Fr. vii. 

 518. 64, and var. a, b, c, d (1838). 



Hab. India. 



49. Xylocopa Olivieri. B.M. 

 Xylocopa Olivieri, St. Farg. Hym. ii. 192. 34. 



Hab. India; Bagdad. 



50. Xylocopa orichalcea. 



Xylocopa orichalcea, St, Farg. Hym. ii. 181. 10. 

 Hab. Bengal; China. 



51. Xylocopa nigro-cincta. 



Female. Length 10 lines. — Head and thorax black; an 

 elevated carina between the antennse, the margin raised round 

 the base of the clypeus, not continued to its anterior margin ; 

 the labrum has three elevated tubercles. Thorax : the disk 

 smooth, shining, and very delicately punctured, the sides having 

 a dense, short, black pubescence ; the wings dark fusco-feiTugi- 

 nous, having a splendid violet iridescence, the legs have a dense 

 black pubescence. Abdomen fenniginous, the apical margins of 

 the segments have a black fascia, the fifth segment obscure, the 

 sixth black, the sides of the abdomen ciliated with a dense black 

 pubescence ; the entire abdomen closely punctured ; beneath is 

 an elevated sharp longitudinal carina down the centre. 



Hab. South America. (Coll. J. S. Baly, Esq.) 



52. Xylocopa flavo-nigrescens. B.M. 



Male. Length 11 lines. — Black, the pubescence is short and 

 dense, on head and thorax fulvo-ochraceous, at the margin of 

 the basal segment of the abdomen it is bright yellow, gradually 

 becoming more obscxu'e towards the apex, where it is deep 

 black, the apex and sides being fringed with long pubescence of 

 that colour ; the basal margin of the second and three following 

 segments have a narrow line of bright yellow pubescence, subin- 

 terrupted in the middle, and not reaching the sides. The scape 

 of the antennae in fi-ont, and the flagellum, except the two basal 

 joints, pale testaceous beneath ; the wings fuscous, with a purple 

 iridescence ; the legs have a black pubescence ; the anterior and 

 intermediate tarsi have a long fringe of black pubescence in front, 



