the Apidse in the British Museum. AQ6 



interesting discoveries. Typical X. {Koptorthosoma) ccerulei- 

 formis, M.-Waldo (Ann. & Mag. Nat. Hist. (8) xiv. p. 454, 

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

 specimen — a female — in which the brilliant azure pubescence 

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

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

 menon of dimorphism being already well known in the 

 African species X. coffra, L., and X inconstans, Smith. 



Xylocopa {Koptorthosoma) ccerulei/ormis, M.-Waldo, 

 yar. fiisca, nov. 



$ . Formse typicse omnino simiHs, sed capita, thorace segmentoque 

 primo abdominis brunneo-hirtis. 



Sarawak : Matang, March 2, 1904. 



To the type-locality (Matang) may be added the following 

 localities in Sarawak :— Kuching, March 1900, Feb. 190f, 

 (J ? ; Limbang, April 1910. Other localities for the species 

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

 30. ix. 1918 (J. C. Moulton), ? . 



X. {Koptorthosoma) ca^rulea, Fabr., is represented by a 

 series of 7 ? ? and 1 (^ from various Bornean localities ; 

 there are also 2 ? $ from Singapore. 



Sarawak : Trnaan, Aug. 1900. British North Borneo : 

 Kinabalu, Sept. 1913, 4 ? ^ , 1 ^ (J. C. Moulton). 



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

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

 coloured as in the ^ . 



Xylocopa (^Koptorthosoma) cceruJea, Fabr., var. viridis, nov. 



2 . Formse typicse similis, sed capite, thorace segmentoque prime 

 abdominis viridi-hirtis. 



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

 2 ? ? (type) ; Lawas, ix. 1909, 1 ? (co-type in Sar. Mus.). 



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

 X. malayana {^=- sarawalcensis, (Jam., as which it is recorded, 

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

 female of that magnificent species still awaits discovery. 



Xylocopa matangce, sp. n. 



$ . Nigra, viridi-senea, nifcida ; capite fulvo-, thorace tergiteque 

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

 lasciatis, pedibus nigro-hirtis ; alis subfuscis. 



Long. 18 mm. 



