598 GEOLOGICAL 8URVEY OF THE TERRITORIES. 



The described female, besides being preserved in alcohol, is a teneral 

 one; De Selys's specimen is more adult. After a careful comparison, I 

 find his description agreeing very well with the female before me, ex- 

 cept the ^'^ point humeral superior rond^'' but such a spot is sometimes 

 only occasional or perhaps belongs to the adult specimen. The length 

 of the femur, 8 millimeters, is the same. In comparing the female with 

 G. plagiatus male, I believe them to be different species. 



Mr. Garman collected in Utah, Great Salt Lake, the nympha-skiu of 

 a Gomphus. The skin is 31 millimeters long, and similar to the species 

 described by Mr. L. Cabot in his monogrttph (p. 3, No. 4). 



Subfamily CALOPTEEYGINA. 



HET^EINA. 



H. Californica, Hagen, Syn., 59, 2. 



In my last report (p. 729), I quoted some fragments of males from 

 Yellowstone. It would be necessary to see more specimens in better 

 condition, but the fragments belong, doubtless, to the genus Hetcerina, 

 and very probably to S. Californica. By some error in the report, the 

 species is placed between the insects not belonging to the Odonata. 



Subfamily AGEIONINA. 



LESTES. 



L. disjuncta, De Selys, Synop. lestes, 18, 10. 



Specimens in bad condition from Yellowstone are quoted in my last 

 report (p. 727). This is a decided northern species. 



L. congener, Hag., Syn., 67, 5. 



A male from Yellowstone is quoted in my last report (p. 727) ; another^ 

 from foot-hill, Colorado, by Mr. Carpenter. 



L. hainata, {L. for cipata Hagen, Syn., 7i, 13). 



Some specimens from Colorado Mountains, Pacific slope, belong 

 probably here ; but all the Lestes, as, in general, all Agrionina collected 

 by the expedition, are in worse condition, and unfit to be determined 

 with certainty. For this species I believe the determination sure, but 

 males and females are present only in broken pieces. 



ARGIA. 



One species from Yellowstone and Snake River, Idaho, quoted in my 

 last report, belonging to the group of ^. moesta, 



AGRION. 



One species from foot-bills, Colorado, group of A. prwvarum,. 



ISCHNURA. 



One species from foot-hills, Colorado, group of I. iners. All the speci- 

 mens being broken more or less, a scientific description would be im- 

 possible and even objectionable. 



