4/0 NEW YORK STATE MUSEUM 



I am not able to distinguish between the nymphs of these species. 

 Constricta and clepsydra were both common at Saranac Inn 

 during the latter half of the summer. I collected many nymphs, and it 

 would seem likely that I should have both species ; but I have found 

 hitherto no specific differences between them. The imagos of the three 

 species are similar in habits and are often found flying together. It is 

 probable that the nymphs are likewise similar in habits. The nymph of 

 Aeschna constricta is described and figured by Cabot^ . Descrip- 

 tions of these three species will be found in the monographs of Calvert, 

 Kellicott and Williamson, frequently cited in the preceding bibliographies 

 of species. Under these circumstances it seems unnecessary to enter 

 into a detailed discussion of them. It will suffice, for the certain recog- 

 nition of nymphs of the genus, to restate the chief characters of the 

 nymph of A. constricta, a species which I have bred abundantly 

 at Ithaca and at Saranac Inn. 



Nymph. Fully grown measures in total length 43 mm, abdomen 31 

 mm, hind femur 6.5 mm ; width of head 7.5 mm, of abdomen 7.5 mm. 



Body elongate, graceful, active ; color varied green and brown, the 

 amount of either color varying to agree with environment, the paler 

 markings of the dorsum generally tending to form longitudinal inter- 

 rupted streaks. 



Head with prominent, well-rounded eyes, whose hind angles almost 

 meet on the vertex ; rear of head hardly convex posteriorly; hind angles 

 broadly rounded ; labium moderately widened in distal half of mentum ; 

 middle lobe with closed median cleft ; lateral lobe squarely truncate on 

 end, denticulate within. 



Abdomen widest in the middle, where the segments are also longest ; 

 lateral spines on segments 6-9, on 6 minute, on 9 a little longer than 

 half the length of the loth segment; inferior appendages longer than 

 segments 9 and 10; the deeply notched superior appendage three fourths 

 as long as the inferiors, the laterals one half as long as the inferiors and 

 with very sharp, incurvate points. 



^ ANAX 



The single species discussed below properly belongs to our fauna: 

 another tropical species, Anax longipes is occasionally picked up 

 on our Atlantic coast. 



1773 Libellula junia Drury, Illus. exotic ent. v. 1, pi. 47, fig. 5n 



1842 Aeschna spiniferus Rambur, Ins. Neur. p. 186, pi. 1, ^g. 14 



1854 Einmous, Agric. N. Y. v. 5, pi. 15, fig. 3 (colored figure of the 



male; no description; no name) 

 1861 Anax Junius Hagen, Synopsis Neur. N. Am. p, 118 

 1875 Anax Junius Hageu, Bost. soc. nat. hist. Proc. 18 : 32 (full bibliography 



and distribution) 



1 Immature state of the Odonata. 1881. pt 2. 



