Occasional Papers of the Museum of Zoology 59 



joining the eye, opposite the antenna; a short dull blue line or 

 bar from each lateral ocellus toward the antenna, wanting in 

 one male. First joint of antenna more or less blue in front; 

 second joint and basal two-thirds of third, black; remainder 

 brown; the third joint short and robust. Profile similar to 

 figure 66. 



Prothorax dark reddish brown to black; anterior border of 

 first lobe narrowly pale; posterior border of middle lobe pale 

 on either side and small indefinite pale areas, sometimes want- 

 ing, on either side near the anterior border. Propleuron large- 

 ly dark or black, some indefinite pale markings above. 



Thorax above very dark reddish brown or black, the pale 

 line on either side of the narrow middorsal black, which is 

 almost universal in Heteragrion and Oxystigma, is discernible 

 only as a slightly lighter brown line or is wanting; the same is 

 true of the antehumeral pale stripe; sides dark, obscure and 

 indefinitely patterned; mesepimeron and metepisternum 

 largely dark reddish brown; the lower ends of these sclerites, 

 the adjacent parts, including the coxae, and the metepimeron 

 pale, stippled and clouded with brown or black to a varying 

 degree and in an indefinite pattern ; the pale color of the 

 metepimeron is light dull blue or grayish, the other pale parts 

 tinged with yellowish; beneath almost white, bluish. 



Abdomen above black, a small subapical pale spot on either 

 side of I ; more or less distinct traces of a longitudinal mid- 

 dorsal pale stripe on 2; scarcely discernible traces of pale 

 basal areas on 3-6. Sides of i and 2 with obscure pale mark- 

 ings; 3 with the extreme lower edge pale; 4-7 with an in- 

 ferior marginal basal pale spot, followed by a dark inferior 

 margin which is followed in turn by a longer narrow pale in- 

 ferior margin which does not reach the apex; this pattern 



