The Odonatit or Dr<i<j<(/I!i'x <>f Ron-fit A frii-n. 



323 



of antennae backward ; very narrow cuneiform blue postocular s]>ots 

 united by a narrow blue line on occipital margin. Prothorax black, 

 sides narrowly blue, posterior lobe very narrowly bordered with blue. 



Thoracic dorsum black ; rather liroad, blue ante-humeral stripes, 

 nearer the humeral than the median suture, about as broad as the 

 median black band of same side. Humeral black extending laterally 

 to lie divided about equally by the humeral suture. Sides otherwise 

 light blue ; a small black dot in dorsal end of second lateral suture. 

 Ventral side whitish. Legs greyish blue ; external side of femora 

 broadly, of tibiae narrowly black. 



Abdomen almost pure light blue, with a very slight greenish shade, 

 marked with black ; quadrangular spot over the entire length of 

 segment 1 ; segment 2 with a complete broad dorsal band, slightly 



FIG. 35. Enallagma nigridorsum, $. Lorengo Marqiies. Appendages, 

 right side and dorsal view. 



contracted towards the middle, contracted at the end, where it joins a 

 narrow terminal black ring ; 3-6 broad dorsal band very narrowly 

 interrupted at base and enlarged at end of each segment ; 7 black 

 except narrow lateral stripes and a very narrow basal ring ; 8 blue, a 

 black spot on anterior half of dorsum ; 9 entirely blue ; 10 blue with 

 dorsal black baud. Appendages (Text-fig. 35) superior black, inferior 

 black in lateral, ochreous in median half. 



Pterostigma greyish, finely marginated with whitish. M.-, and M } a 



5+2.5 + 3 jTim 77 11 



-jr. Aid. 21, Jidw. 14 mm. 



4 + d . 4+3 



9 The females are not in sufficiently good condition for 

 description. 



From Madagascar there are in the writer's collection 3 <^ , 2 ? , given 

 him years ago by M. E,. Martin. These specimens differ somewhat 



