14 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Described from two females collected at Hyattsville, Maryland. 

 June 4, 1913. Type a female deposited in U. S. National Museum, 

 Washington, D. C. A figure of the abdomen of Celatoria diabro- 

 ticce has been provided for the purpose of comparison (plate I, 

 fig. 3). 



NOTES ON THE ENTOMOLOGY OF THE ARIZONA 

 WILD COTTON. 



BY W. D. PIERCE AND A. W. MORRILL. 



Arizona wild cotton, Thurberia thespesioides, has been under 

 observation for several years, by Prof. J. J. Thornber, of the Uni- 

 versity of Arizona, who has acquired specimens from many different 

 localities in southern Arizona and has in fact recommended it as a 

 flowering shrub. Possibly it first received attention from an 

 entomological standpoint from one of us (Morrill), when, in Au- 

 gust, 1912, in company with Prof. R. H. Forbes, director of the 

 Arizona Experiment Station, several plants were found and ex- 

 amined near Fish Creek on the Roosevelt Road, where the plant 

 had not previously been known to exist.. A considerable number 

 of bolls were examined, but no insect injury of any kind was noted. 

 Believing that the cotton boll weevil would attack this as a food 

 plant, a number of the bolls and squares were mailed to the labora- 

 tory of the Bureau of Entomology at Dallas, Texas, for testing 

 with live weevils. This material was not received in good con- 

 dition, however, so the testing of the attraction of the Arizona *vild 

 cotton for the typical Anthonomus grandis was deferred until the 

 past summer. 



The plant assumed economic importance when Mr. 0. F. Cook 

 made an announcement in February, 1913, of the finding of the 

 Mexican cotton boll weevil in the bolls in Sabino Canyon, Santa 

 Catalina mountains. This announcement was followed very short- 

 ly by the receipt at Washington of a sack of infested bolls from 

 Stone Cabin Canyon, Santa Rita Mountains. Out of a total of 

 743 bolls, 220 weevil stages were obtained. Of these, 171 were 

 dead but 18 live adults were found in their cells. In the bolls the 

 mortality was provisionally classified as follows: 



per cent 



Due to climatic causes. . (>.">. 00 



2.27 



Due to predators 



Due to parasites . . 1 .82 



Due to fungus . . S .63 



Total for all classes.. 77.72 



