68 MR. F. F. LAIDLAW OX 



rather ovoid in shape ; at its middle it carries on either side 

 a blunt tooth or spur; the last two-fifths of its course it has 

 nearly parallel sides fringed regularly with fine hairs and its apex 

 blunt in outline. 



The 10th abdominal segment carries on its dorsal surface a 

 small, laterally compressed truncate projection. 



On the underside of segment 7, at the junction of its middle 

 and distal thirds, is a fine bunch of yellow-brown hairs pro- 

 jecting downwards. This character is perhaps specific, but may 

 occur in the males of other species ; I have not seen it noted, 

 and have not been able to examine other specimens *. 



I. dohrni horneensis differs fi'om the typical /. dohrni from 

 Sumatra chiefly as follows : — • 



I, dohrni Kriiger. /. dohrni horneensis. 



i. All the coxfe yellow. First two pairs of coxae yellow. 



ii. Lower anal appendage not Lower anal appendage slightly 

 overlapping upper pair, overlapping upper pair, 



iii. Yellow markings on ab- 

 domen more extensive. 



Group iii. Macromixa. 

 Genus Macromia. 



According to Martin, the following species have been recorded 

 from Borneo : — 



Macromia cincta Ramb. 



5, horneensis Kriiger. 

 ,, gerstaeckeri Kriiger. 

 ,, cingidata Ramb, 

 ,, westwoodi Selys. 



I give a brief description of a very large female specimen, 

 collected by Mr. Moulton, which must probably be referred to an 

 unnamed species, 



4. Macromia sp, 



A single $ taken in October 1911 at Sadong, 



Length of hind wing 58*5 mm. 



,, abdomen 65 ,, 



,, pterostigma 3 „ 



The specimen is unfortunately badly damaged. It is remarkable 

 on account of its great size, and is most pi^obably unnamed. I 

 prefer to leave it so for the present, in the hope that more 

 material may be forthcoming shortly. 



Fore wing: antenodals 17-19, postnodals 10, supratriangulars 

 4, median cross-nei'ves 5. 



Hind wing: antenodals 11, postnodals 12, supratriangulars 2, 

 median cross-nerves 4. 



* See note at the end of tliis paper. 



