A New Dipterous Gall on Stanleya 



T. D. A. COCKERELL 



On June 18, 1914, my wife and I found a hitherto undescribed 

 gall on Stanleya glauca Rydberg, a remarkable cruciferous plant 

 growing about four miles north of Boulder, Colorado. Thinking 





Figure 1. A, Apical part of wing. B, Male genitalia. C, Segment of male antenna. 



to rear the adults, the galls were placed in a bottle with some earth 

 and watched for a long time, but nothing appeared. Supposing the 

 effort to have been unsuccessful, I set the bottle aside; but long after 



Figure 2. A, Breastbone of larva. B, Spines at caudal end of larva. C, Skin of larva. 

 D, Gall. 



discovered that adults had eventually emerged, but had died and 

 were covered with mold. I was able to rescue sufficient fragments 

 to make the drawings given herewith, which, together with the 



