37 2 ENTOMOLOGICAL NEWS [Oct., '13 



Ants Crossing Water (Hymen.). 



In a letter to "Nature" (June 26, 1913, p. 425), Mr. John C. Willis 

 of Rio de Janeiro, mentions that a fly trap being found covered with 

 ants, it was put on a finger bowl which was placed in a plate of water. 

 The ants in coming to the edge of the water, ran around the bowl 

 until seemingly convinced there was no way across, and then calmly 

 "took to the water" and ran across it by the aid of surface tension, 

 without "getting their feet wet." They soon returned, crossing in the 

 same way, and this went on regularly, a steady procession crossing the 

 water. 



A Dragonfly Depositing Eggs in a Rainpool Over Concrete 



(Odonata). 



On April 16, 1913, I observed a dragonfly hovering about a very 

 shallow pool of water on a concrete pathway, occasionally darting 

 rapidly down to it and dipping the end of the abdomen into the pool 

 in the characteristic manner of oviposition. The species was unknown 

 to me ; no eggs could be found but the pool was full of debris which 

 would make it difficult to find them. The sun was shining brightly 

 (8.30 A. M.) and the pool had completely dried after several hours. 

 A. A. GIRAULT, Nelson, North Queensland. 



Some Colorado Dragonfly records (Odonata). 



Recently Mr. W. J. Gerhard sent me some dragonflies collected by 

 him near Denver, Colorado, about the middle of July, 1909. 



Mr. Gerhard's brief field notes, on the dates of interest in this con- 

 nection, are as follows : 



July 13, 1909. At Berkeley Hills, a suburb of Denver. The edge of 

 a small lake or pond yielded nothing of interest save dragonflies. 



July 14, 1909. Berkeley Hills. 



July 15, 1909. Berkeley Hills and Clear Creek (the latter about 54 

 of a mile from Berkeley Hills). 



July 16, 1909. Berkeley Hills and Clear Creek. 



July 17, 1909. Clear Creek. 



Hefaerina americana, 5 males, 2 females ; July 17, 1909. 



Argia ririda, i female; July 17, 1909. 



Amphiagrion saucium, 5 males, 2 females; July 15, 17, 1909. 



EnaUagma clausum, i male; July 16, 1909. 



Enallanma cahcrti, i male; July 13, 1909. 



Enallacjma carnnculatnui. i male; July 13, 1909. 



Enallagma civile, i male; July 13, 1909. 



Ischnura danntla, 5 males, 4 females; July 13, 1909. 



Op hi on 0111 f>hus scvcrus, i male, T female; July 14, 17, 1909. 



Sympetrum scmicitictmn, 4 males, 3 females; July 13, 14, 16, 17,1909. 



Sympetrum corruption, 2. females; July 13, 14, 1909. 



Libellula pulchclla, i female; July 16, 1909. 



E. B. WILLIAMSON, Bluffton, Indiana. 



