Sept., '03] ENTOMOLOGICAL NEWS, 217 



have no black at all, or but the very slightest trace of it, left 

 on the humeral suture, so that the color-pattern of the thorax 

 is changed ; ground color orange with a broad dorsal median 

 band bronzy black. These individuals are fully adult and 

 their orange is of a dull brownish shade. They correspond 

 exactly to the orange forms of the common European /. ele- 

 gajis and the not less common Indo- African /. seyiegaleiisis. 



It is just possible, but not very probable, that the two modi- 

 fications of the green and yellow form respectively are only 

 conditions of age. Observers might well give some attention 

 to the question. One might further suggest the confusion of 

 two different species ; but I cannot find any other difference in 

 the two sets of females, and the many males are all identical. 



Fully colored females show a curious dull greyish blue pul- 

 verulence, which, leaving the last third or fourth of each seg- 

 ment black, produces a peculiar annular color-pattern, quite 

 unknown in old-world Ischnurse. 



6. /. ramburi. Less common than verticalis, but still in 

 good numbers. Orange females much more prevalent, no black 

 on their humeral sutures. 



7. Enallagma durum. Two females of this large southern 

 species were found. 



8. E. civile. Common, females scarce. 



9. E. aspersuni. Scarce on the first visit at end of July, 

 rather numerous a month later. 



10. Nehalennia posita. Very abundant. Adult females 

 show the same annular pattern of dull grey pulverulence as 

 /. verticalis. 



11. Argia violacea. Common in the forest near Towson 

 town. 



12. Anax Junius. One male captured, others seen. 



13. Libellula pulchella. Two specimens captured and others 

 seen, scarce and wary. 



14. L. atcripeunis. Very abundant and a most conspicuous 

 insect by its bright red body and rich golden wings. Both 

 sexes in about equal numbers and easily captured. 



15. Plathemis lydia. Common. 



16. Celithemis eponina. Scarce and wary ; but one female 

 captured. 



