the A|)i(l£e in (he Brldsh Museum. -1G5 



interesting discoveries. Tyjiiral X. [Ko/'torlhosonia) Citruiei- 

 formis, M.-\Val«lo (Atiti. t<: M;i<r, Nj,(. Hist. (8) xiv. p. 454, 

 1914), is well represented in both sexes ; but tlierc is one 

 specimen — a female — in which the brilliant azure pubescence 

 is replaced with fulvous brown, similar in colour to tliat of 

 the male. The female is doubtless dimorphic, the pheno- 

 menon of dimorphism being alre.-idy well known in the 

 African species A', cojfra, L., and X. inconstnvs, Smith. 



Xylocopa {Koptorthosomo) cwrulei/ormisj M.- Waldo, 

 yur./usca, nov. 



$ . Formae typicce omnino similis, sed capita, thorace segmentoque 

 primo abdominis brunneo-hirtis. 



Sarawak : Matang, ^larch 2, 1904. 



To the tyj)e-locality (Matan<i) may be added the followinor 

 localities in Sarawak : — Kuchiiier, March 1900, Feb. 1901, 

 cJ ? ; Limbfing, April 1910. Other localities for the species 

 are Singapore and Mt. Kiiiabulu (B. N. Borneo), 3000 ft., 

 30. ix. 1918 {J. C. MouHon), ? . 



X. (Koptorthosomo) ccerulea, Fabr., is represented by a 

 series of 7 $ ? and 1 c? fiom various Bornean localities ; 

 there are also 2 ? $ from Singa|)ore. 



Sarawak : Tmsan, Au2:. 1900. British North Borneo : 

 Kinabalu, Sept. 1913, 4 ? ? , 1 c? (/• C. Moulfon). 



In this species, too, the female is apparently dimorpliic, 

 one form, as in the preceding species, having the pubescence 

 coloured as in the (^ . 



Xylocopa {Koptorthosomo) ccerulea, Fabr., var. viridis, nov. 



$ . Formae typical similis, sed capite, thorace segmentoque primo 

 abdominis viridi-hirtis. 



Sarawak: Kuching, 11. ii. 1908 {G. Meade- Waldo), 

 2 ? $ (tyP'O ; Lawas, ix. 1909, 1 ? (co-type in Sar. Mns.). 



Tiiis variety was first considered by me to be the ? of 

 X. malayava { = saratva/cetisis, (Jam., as which it is recorde(i, 

 Sarawak Museum Journal, no. 3, p. 24, 1913), but the 

 female of that magnificent species still awaits discovery. 



Xylocopa matanga:, sp. n. 



$ . Nigra, viridi-»nea, nitida ; capite fulvo-, thorace tergiteque 

 primo pallide flavo-pilosis ; tergitibus 2-4 apice lateribus albo- 

 fusciatis, pedibus nigro-hirtie ; alls subfiiiscis. 



Long. IH mm. 



