19I9-] 



F. F. Laidlaw : Indian Dragonflies. 



I9J 



P. bensalense cf 



Protho- 

 rax. 



Thorax. 



Blue markings very 

 small. 



Mid-dorsal and 

 antehumeral bands 

 broad. 

 Abdomen. Segment 8 with 

 apical spines only 

 black. Segment lo 

 with dorsum entirely 

 black. 

 Anal ap- Upper pair about 

 pendages. half length of seg- 

 ment 10. No inner 

 shelf. Lower pair 

 marked with black. 



Venation. Antenodals ii (fore- 

 wing). Ab rises at 

 Ac. Costal margin 

 of quadrangle of 

 fore-wing two-fifths 

 length of anal mar- 

 gin. 



Pterostigma brown- 

 ish-black. 



P. microcephal'um cf . 

 Blue markings large. 



Mid-dorsal and antehumeral 

 bands narrow. 



Segment 8 with well marked 

 terminal black ring. Segment 

 10 blue with large black mark 

 not covering dorsum entirely. 



About equal in length to seg- 

 ment 10. Well marked shelf 

 on either of the upper append- 

 ages, on their inner side 

 coloured white. Lower pair 

 whitish. 



Antenodals lo (fore wing). 

 Ab rises distinctly before Ac. 

 Costal margin of quadrangle of 

 fore wing rather less than one- 

 third length of anal margin. 



Pterostigma yellow-brown. 



Indian 



l.aidlaw. 



The fact that these two forms Uve side by side, as well as the 

 striking differences in the anal appendages of the male, strengthens 

 the view that they are distinct species in spite of their very close 

 general similarity. 



The type of P. bengalense will be returned to the 

 Museum. 



Pseudagrion rubriceps, Selys. 



Pseudagrion rubviceps, Kirby, Cat. Odonata, p. 153 (^1890); 

 Rec. Ind. Mhs., XII, pp. 24-25, fig. 2 (1916). 



3 J'c?' Nagpur, C.P., 1,000 ft., S-12-1915 (£". D'Abreu). 



In these males the ground colour of the dorsum of the thorax 

 is an olive-brown. On either side of the black mid-dorsal carina is 

 a fine stripe of olive-brown enclosed within the black colouring of 

 the mid-dorsal band. 



Segments 8, 9, 10 are bright blue, but 8 has a broad black 

 dorsal band, wider posteriorly. The excavated part of segment 10 

 is likewise bright blue, making the "end-on" appearance of the 

 segment very striking, and serving perhaps as a recognition mark. 



The upper anal appendages are black, and the lower pair 

 greenish-white. 



The upper pair have each a strong internal tooth directed 

 upwards lying at about the middle. The lower pair when viewed 



