y\ 11 ENTOMOLOGICAL NEWS [DcC, '14 



Dragonflies (Odonata) collected in Texas and 

 Oklahoma. 



By E. B. Williamson, Bluffton, Indiana. 



(Continued from p. 415) 



16. Argia agrioides. 



Texas: Clifton, May 29, 30 and 31, and June 1, 37 S, i $ ; 13 ^ i" 

 alcohol, det. Calvert. 



A. agrioides was first seen by me at Clifton on a small 

 stretch of hard, light-colored, barren, pavement-like ground, 

 from which all the lighter soil particles had been washed. This 

 ground had a slight slope towards a shallow dry gulley which 

 in turn led into the small stream mentioned in the itinerary 

 under date of May 31. These bright blue dragonflies were 

 resting on the ground, were restless, and, when flushed, were 

 followed with difficulty because of a sharp wind. On subse- 

 quent days I found them along the bed of the small stream. 

 This stream, near its mouth, has steep, washed sides and, at 

 the date when we collected, long pools of water. Towards its 

 source it dwindles rapidly, the channel is less deeply eroded 

 and vegetation occurs on the banks and in the stream bed. 

 Except for a few small marshy spots near its head it is a typi- 

 cal wet weather gully. In this insignificant gully, with its 

 generally apparently unfavorable conditions, 8 of the 15 spe- 

 cies and subspecies of Argia known north of ^Mexico were 

 taken in one day, June i. Only 10 species of Argia were taken 

 on the collecting trip. Of the 2 species not taken June i, one 

 (tibialis) was taken on both sides of Clifton and I believe 

 will be found there, possibly a little later in the season. The 

 other (intruda) was taken only at Wister, Okla. Of the 8 

 species taken on June i, 4 (translata, vivida, immnnda and 

 agrioides) were not taken elsewhere than at Clifton; i (zno- 

 lacea) was taken also at Wister, Oklahoma; and 3 (moesta, 

 sedula and apicalis) were taken on both sides of Clifton. Of 

 the 4 not taken elsewhere, translata is of very wide distribu- 

 tion ; vivida is of wide distribution in the western States and 

 into Mexico ; immunda and agrioides are southwestern and 

 Mexican. Violacea is of wide distribution ; and of the 3 species 



