264 NEW YORK STATE MUSEiUM 



of tlie others, together with a few correction s. Dr P. P. Calvert 

 has generously offered for publication here additional data on 

 the distribution of the New York species of Odonata, accumu- 

 lated since the publication of the second instalment of his list. 

 In bringing such data together in one place, he shows commend- 

 able regard for the convenience of the student of our local 

 fauna. 



1 ANISOPTERA 



ADDITIONAL NOTES WITH DESCRIPTIONS OF HITHERTO UNKNOWN 



NYMPHS 



Hagenius brevistylus, lanthus parvulus and Dromogomphus spinosus 



A Diijiibfr of cast nymph skins of each of these species were 



found on the stone embankment at the outlet of Forest lake 



'(Fall creek, Ithaca) on my arrival in the latter part of June. A 



female imago of L. parvulus was found in a mass of foam 



floating on the water at the foot of a little fall in Fall creek 



July 9. 



Gomphus fraternus 



The species to which I have several times referred by this 

 name in print^ as coming from Havana 111. was so determined 

 for the Illinois State Laboratory of Natural History by Dr 

 Hagen from material obtained from that locality. It appears 

 from a recent study of this and closely related species by Dr P. P. 

 Calvert- that Dr Hagen made a mistake in naming it so. The 

 Havana species is G. e x t e r n u s, and, as may be inferred from 

 the fact that Dr Hagen confused the two species, they are exceed- 

 ingly closely related. I was unable to use Dr Calvert's paper in 

 the preparation of Bulletin 47, and the description I have given 

 therein on p.451 is drawn from specimens of G. e x t e r n u s. It 

 will apply equally well to the nymph of G. fraternus. I took 

 the latter species in transformation at Ottawa 111. on May 24, 

 and have since had bred specimens for study from the United 

 States National Museum, collected at Detroit Mich. It has re- 



iCanadian Ent. 29:164, 165, pl.7, fig.ll and 12. X. Y. State Miis. Bui. 47, 

 r.451, p].20, tig.ll and 12. 



20n Gomphus fraternus, externus and c r a s s u s (Order 

 Odouata), Ent. News. 12:65-73, pl.3. 



