4 BULLETIN". 571, U. S. DEPARTMENT OF AGRICULTURE. 



H. M. Russell reported this species as reared from pecan on May 

 18 and 20, 1908, at Orlando, Fla. (Chittenden No. 348), and D. K. 

 McMillan, at one time connected with the bureau, recorded it on May 

 25, 1908, from pecan at Brownsville, Tex. (Chittenden No. 1045). 

 The material on which Riley based his description was probably 

 collected in Missouri, and the material on which Hulst (3) described 

 this insect under the name Acrohasis albocapitella was taken in Canada 

 (Ontario). Fiske (9) reported it from Georgia, Gossard (12) from 

 Florida, and Herrick (14) from Texas (Cuero and College Station). 

 The writer has seen it occurring in injurious numbers on pecan in 

 Florida, .Georgia, Alabama, Mississippi, "Louisiana, and Texas. It 

 has been reported to be injurious hi South Carolina, and it is also 

 known to occur in North Carolina and Virginia, but in these States 

 apparently it does only minor damage. So far as is known, this in- 

 sect ranks as a serious pest only in the southern part of the pecan- 

 growing area, but from the foregoing records it can be seen that 

 the species is quite widely distributed over this country. 



FOOD PLANTS. 



In his original description, Riley (1) gave wild crab (Crataegus sp.) 

 as the food plant from which a single specimen was reared. Dr. 

 Dyar (13) made the following statement: "I have 23 specimens 

 before me, 4 bred by Dr. Riley on hickory and walnut, including 

 the type of nebuleTla" and he also gave numerous records of its 

 occurrence on pecan. Dr. Dyar (13) also gave a record made by 

 Mr. August Busck in which this insect was reared from walnut on 

 June 7, 1913, at Washington, D. C, and Mr. M. M. High (14) found 

 it on wild hickory near College Station, Tex. Gossard (12) reared 

 it in abundance from the pecan in Florida, and Herrick (14) states 

 that he "reared many specimens from pecan at Cuero, Tex., where 

 it was very abundant and doing serious damage." There are also 

 many other records of this species occurring on pecan. So far as 

 the writer's experience goes, the larva? have been observed feeding 

 upon hickory, Japanese walnut, and pecan, and moths have been 

 reared from material collected on pecan and hickory. The writer 

 has not yet found the black walnut to be attacked, although not 

 infrequently that species has been found growing in close proximity 

 to badly infested pecan trees. According to the writer's observation 

 and experience it is very difficult to find larvse on various species of 

 Hicoria other than H. pecan, even in sections where this species ranks 

 as a pest in pecan orchards. This species shows a decided preference 

 for the pecan, and in many sections of the South it is the most 

 injurious insect affecting the culture of this nut. 



In making observations in pecan orchards in localities where this 

 insect occurred in injurious numbers, an apparent varietal resistance 



