NO. 1571. DRAGONFLIES OF BURMA AMD SIAM— WILLIAMSON. 295 



g. LEPTOGOMPHUS? MACULIVERTEX De Selys. 



"Meteleo, iin exemplairc iiiii([iie (female), le 10 septembre, 1888 

 (Fea) . ' ' Not seen by me . The following brief description is condensed 

 from De Selys : Head black, yellow as follows : A transverse band above 

 on frons, a rounded spot on each side of nasus, a band on upper lip, 

 cheeks, a round point at center of vesicle, and the occipital ]:)late. 

 Thorax black, yellow as follows: A mesothoracic half collar, nar- 

 rowly interrupted in the median line, joined at either side with the 

 dorsal stripes to form a 7; a narrow antehumeral stripe terminating 

 above in a rounded isolated spot; a trace of pale on the mid-dorsal 

 carina; sides and below clear yellow, a black line on the upper half 

 of the first suture and a complete line on the second suture. Legs 

 black, femora yellow, with an external black stripe. Abdomen black, 

 marked with yellow; 3-7 with dorsal yellow spots not reaching the 

 extremities of the segments, on 7 occupying only the basal two-thirds 

 of the segment; 8-10 black. 



lo. LEPTOGOMPHUS ? NIETNERI Hagen. 



"Leito, un male, uni([ue pris le 27 octobre (Fea)." Not seen by 

 me. The following l)rief description is condensed from Hagen and 

 De Selvs: Lower lip j)ale yellowish, middle lobe apically brown- 

 ish; upper lip black, with 2 large yellow basal spots; rhinarium 

 and nasus black; frons black, \vith a transverse yellow band in front 

 above. Thorax black above, yellow as follows: An interrupted 

 mesothoracic half collar, isolated oblique dorsal stripes, and a superior 

 antehumeral spot; sides yellow, with a black stripe on each lateral 

 suture. Legs black, femora with brown markings. Abdomen black 

 marked with yellow; 1-7 (1-6 De Selys) with a dorsal stripe, nar- 

 rowed on 3-7; on 6 and 7 a larger dorsal basal spot (not mentioned 

 by De Selys); yellow markings on the sides of 1-3; 4-8 each with a 

 short linear lateral basal spot (not mentioned by De Selys) ; a lateral 

 apical yellow spot on 8 and 9 (not mentioned by De Selys). A com- 

 l^^rison of Hagen' s description based on a male from Ceylon with 

 De Selys's description based on a male from Burma creates some 

 doubt as to whether the 2 specimens really represent the same species. 



Genus MICROGOMPHUS De Selys. 



Only one species of this genus is known. It has been taken in 

 the Malay Peninsula and Sumatra. M. chelifer,T>e Selys is a small 

 species, abdomen 25 mm., hind wing 18.5-22 mm. The face is black, 

 marked with yellow. Thorax above black, with a pale dorsal stripe 

 on either side joined with the interrupted mesothoracic half collar; 



