1902.] DRAGONFLIES OF THE " SKEAT EXPEDITIOX." 83 



have, when looked at obliquely, a very faint whitish " smoky " 

 appearance. 



Head small, black save for a yellow transverse band on the 

 ' frons ' before the eyes, stopping abruptly at its anterior edge. 

 Eyes distant. Occiput with the two convexities at its hinder 

 margin more pronounced than in S. japonicus. 



P7'othorax black; at its hinder margin a transverse yellow 

 band tapering laterally. In front of this is a yellow spot. 



The colouring of the thorax is just as described by Kriiger for 

 the female. On the upperside a yellow band runs from the front 

 margin up to the yellow marking in between the wings ; this 

 band is twice as broad in front end as it is at its hinder end. On 

 either side are two fairly broad yellow oblique bands. 



The abdomen is ringed with black and yellow ; the first segment 

 is yellow with a black mark on either side. These black marks 

 are continued on to the second segment, in which they run a 

 little obliquely up to the dorsal surface, meeting at the hinder 

 end of the segment ; a fine black ring runs round its posterior 

 margin. This segment is black below, and the auricles are tipped 

 with black continuous with the lateral stripes. The yellow ring 

 of segments 3-8 occupies the following jDortion of each segment : 

 the front two-fifths of 3, the front one-third of 4, 5, one-fourth 

 of 6, 7, two-fifths of 8 ; 9 and 10 are entirely black. There is a 

 very fine mid-dorsal black line in 3 ; this is present, increasing 

 in breadth as one passes back from 4-7, but absent in 8. The 

 appendages of the tenth segment agree very closely with those 

 figured by de Selys for ^S'. japonicus (Selys, Mon. Gomph. pi. xiii. 

 fig. 3 b). The upper pair are rather shorter than the tenth 

 segment, slightly ciliated except at their end, which is sharply 

 pointed and curved upwards ; they carry two teeth on their lower 

 side, one at about a third of their length rather blunt, directed 

 downwards and a little outwards, the other at the end of the 

 second third, sharper and curved backwards. The lower pair 

 about half the length of the upper pair, thick and blunt. 



The femurs of each leg have a number of short prickly spines 

 on their outer lateral face ; the hinder pair have a few delicate 

 hairs on their upper surface. All have short tooth-like spines in 

 regulai- i-ows along their lower sides. 



A single specimen ( c? ) was caught at the foot of Gunong Inas 

 (about 1000 feet above sea-level) near a small jungle-pool, in 

 January 1900. 



Family CALOPTERYGID.^^:. 

 Subfamily Calopterygik.e. 



The following is a list of the Calopterygines mentioned in 

 Ji^irby's Catalogue or elsewhere a.s known to occur in tlie Mahiy 

 Peninsula up to 1890 : — 



Neurobasis chinensis Linn. 

 Vestalis amoena Ha gen. 



