3IO The Ohio Naturalist. [Vo]. V, No. 6, 



DRAGONFLIES. 



1. Calopteryx angustipennis. Not rare, frequenting willow- 

 herb at ripples. This species was taken by Mr. Chas. Dury along 

 Little Blue River, Crawford County, Indiana, May 27, 1904. 

 This lost species, rediscovered in L899 in Pennsylvania and Ohio, 

 seems to have unaccountably escaped collectors for a long period. 



2. Argia tibialis. This species was found abundantly along 

 Sycamore Creek, a tributary of the Cumberland, near Nashville, 

 Tenn., during the spring of 19(U. 



3. Enallagma exsulaiis. This is the river Enallagma of the 

 Ohio River system. 



4. Progomphus obscurus. This common gomphine was not 

 rare along the Rockcastle. 



5. DroHiogoitiphus spinosus. What has been said of Progom- 

 phus obscurus applies to this species. 



6. Gomphus dilatatus. Two males, resting on boulders in mid- 

 stream in a ripple, were taken. 



7. Lanthus albistylus. Observed in the afternoon resting on 

 boulders and pebbles about a wide slow ripple. The nymph, 

 described by Hagen from Kentucky as possibly Tachopteryx 

 thoreyi and referred by Needham to Lanthus parvulus, in all 

 probability is this species. 



8. Hagenius brevistylus. Recently emerged individuals of 

 both sexes were taken. 



9. Macronu'a illinoiensis. Several males taken flying along 

 the river. 



CRAYFISHES FROM KENTUCKY. 



Notes and determinations by Dr. A. E. Ortmann. 



1. Cambarus bartoni (F.) 3 males (second form), 1 female. 

 Rostrum more tapering and narrower than in typical specimens 

 from eastern Pennsylvania; but a similar form of rostrum is 

 found in (chiefly young) individuals from western Pennsylvania. 

 Tubercles of inner margin of hand more strongly developed, with 

 slight indications of a second row. 



Small streams tribuatry to Rockcastle River, Livingston, 

 Rock Castle Co., Ky. E. B. Williamson. 



2. Cambarus extraneus Hag. 2 males (second form), 2 

 females. Hagen, 111. Cat. Mus. Harvard. 3. 1870 p. 73. Faxon, 

 Mem. Mus. Harvard. 10. 1885 p. 84. Faxon, Pr. U. S. Mus. 20. 

 1898 p. 050. 



Areola slightly longer than half of anterior section of cara- 

 pace; fingers of chelae elongated (characters of girardianus). 

 Lateral spine of carapace well developed ; external orbital spine 

 comparatively small; distal upper end of meropodite of cheliped 

 with two spines (in one specimen with three, the third anterior 

 to the others, and small). 



