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Indiana University Studies 



of the same color as the third and fourth segments; parapsidal grooves 

 converging more closely; areolet averaging moderately small. 



GALL. — Very similar to the gall of traiislatus, differing in being- 

 more globoid, irregular, up to 20. mm. in diameter and 50. mm. in 

 length, usually smaller. On Quercus Emoryi. 



RANGE. — Arizona: Santa Catalina Mountains (Sabino Trail, 

 3000-4000 ft.), Oracle, Santa Rita Mountains, Fort Huachuca, Globe. 



TYPES. — At the Philadelphia Academy of Natural Sciences. From 

 near Tuscon, Arizona; on a live oak; E. T. Cox collector. 



Galls which I collected in the Santa Catalina Mountains on 

 January 1, 1920, contained mature larvse; the adults emerged 

 in abundance at some later date. Further south, in the Santa 

 Rita Mountains, on January 6, and at Fort Huachuca on Janu- 

 ary 14, most of the adults had emerged from the galls, only a 

 few emerging later, and at the same time young galls were 

 to be found. Apparently emergence occurs as early as De- 

 cember. Further north, at Globe, on January 20, all of the 

 adults but one had previously emerged from the galls I col- 

 lected. 



I have not been able to examine the Bassett types ; my re- 

 descriptions are made from galls and insects I collected in the 

 Santa Catalina Mountains. This is a very characteristic 

 species in the region, and altho the galls are of somewhat 

 the same plan as those of Andricus riigulosns the insects are 

 very distinct. There can be no question that my Santa 

 Catalina material, from Q. Enioryi, represents the species and 

 variety Bassett ''received from Prof. E. T. Cox, who collected 

 them near Tuscon, Arizona, probably from one of the dwarf 

 live oaks of that region." Inasmuch as oaks do not grow 

 nearer to Tuscon than in the Santa Catalina Mountains, and 

 Q. Emoryi is the first oak met with along the trail, and the 

 only black oak up to about a five thousand foot elevation, it is 

 probable that Professor Cox's material came from this oak in 

 these mountains. The only other variety I have found occurs 

 at a higher elevation, on Quercus hypoleuoa, and its large 

 areolet does not fit Bassett's description of coxii. The galls I 

 collected at Globe are labelled Q. arizonioa, but I think I may 

 have made some mistake in the record. 



In 1900 Bassett redescribed coxii as a new species, using 

 the same name, giving a nearly exact redescription, based on 

 the same material as that used for the first account. Dalla 

 Torre and Kieifer, 1902 and again in 1910, ignoring the 

 obvious, considered the redescription a new species, took coxii 



