134 



PSYCHE 



[August 



Explanation of Plate 3. 



The Oak Tingis, Corythuca arcuata Say. 



Side view of egg. 



Top view of egg. 



Dorsum of first instar. 



Spine from lateral margin of first instar. 



Dorsum of second instar. 



Dorsum of third instar. 



Dorsum of fourth instar. 



Spine from lateral margin of fourth instar. 



Dorsum of fifth instar. 



SOME HITHERTO UNKNOWN NYMPHS OF ODONATA FROM 



NEW MEXICO. 



BY JAMES G. NEEDHAM, LAKE FOREST, ILL., AND T. D. A. COCKERELL, 



PECOS, N. ]MEX. 



During the year 1902, dragon-fly nymphs were collected in three New Mexico 

 localities, each of which yielded material of interest. 



(A.) Las Vegas Hot Springs, 6709 ft. alt. 



A few years ago some specimens of Hvponenra liigens were collected at Las 

 Vegas Hot Springs, and upon investigation it appeared that the species occurred 

 there as a permanently established and tolerably numerous colony. This excited 

 some surprise, as the place is hundreds of miles from the nearest previously-known 

 locality for Hyponei/ra, and is in the Transition zone, where the insect was hardly 

 expected to occur. That the colony was really an isolated one appeared probable 

 not merely from the absence of other New Mexico records, but from the fact that 

 we could not find the species in other localities, such as the Arroyo Pecos, which 

 were very prolific in agrionines. The search for nymphs of Hyponcnra was at first 



1 The descriptions of the nymphs are by Dr. Needham. The material was collected by JNIr. and Mrs. Cockerell, and 

 Mr. Cockerell is responsible for the matter relating to localities, etc. 



