INSECTS INJURIOUS TO THE BLACK WALNUT. 335 



22. Aspidisca juglandiella Chambers. 



The larva lives in a very small blotch-mine, from which it cuts out a 

 ".ase in which it pupates. 



23. The red-tailed attelabus. 



Attelahus analis Weber. 



Order Coleoptera ; family Curculionid^. 



Rolliug up the leaves of the oak and black walnut, a weevil 9 quarter of an inch 

 long, with a long, slender, cylindrical head and short, broad, thick body. The 

 autennte, legs, and middle of the breast deep blue-black; the thorax, wing-covers, 

 and abdomen dull red ; the wing covers, taken together, nearly square and pitted in 

 rows. 



According to Harris, this pretty weevil is found on the leaves of oak 

 trees in June and July. Mr. George Hunt has observed it on the wal- 

 nut in May before the buds open, at Providence. It is possible that 

 Fig. 65, p. 204, represents the work of this species. 



24. Conotrachelus juglandis Le Conte. 



The larva of this weevil, which is closely allied to that of the plum 

 weevil, was taken from walnuts 



at Mount Carmel, 111., by Mr. SBBk ^ 



Shimer. According to Harris, 

 Mr. Say, in a note on the plum 

 weevil, stated that his "kins 

 man, the late excellent William 

 Bartram, informed him it also 

 destroys the English walnut in 

 this country." It is possible that '''^Mp'' '^ 



the insect here reierred to was j-iq ]25.—Conotrachelus jnglandis,- a, larva; b, head 

 confounded with the plum weevil seen in front. Gissler, del. 



and belongs to the present species. 



The ENGLISH WALNUT SCALE. 



25. Aspidiotus juglana regice Comstock. 



The following account of this insect is taken from Prof. Comstock's 

 report as Entomologist in the U. S. Agricultural Report for 1880 : 



Scale of the female. — The scale of the female is circular, flat, with the exuviae 

 laterad of the center ; it is of a pale grayish brown color; the exuvife are covered 

 ■with secretion ; the position of the first skin is indicated by a prominence which is 

 pink or reddish brown. The ventral scale is a mere film which adheres to the bark. 

 Diameter of scale, 3™'" (.13 inch). 



Female. — The color of the female when fully grown is pale yellow with irregular 

 orange-colored spots ; oval setie and last segment dark yellow. This segment pre- 

 sents the following characters: There are either four or five groups of spinnerets; 

 the anterior group is wanting or consists of from one to four spinnerets, the anterior 



