— 16— 



margin laterad of second incision. All ventral grouped 

 glands located well forward, numbered as follows: median, two; 

 cephalolaterals, three to eight; caudolaterals, three to five. 



This species was originally described from III. where it 

 has in some localities become a serious pest. It has been 

 received from Douglas Co., Kan., and has been collected at 

 Ames on plum. 



ASPIDIOTUS PERNICIOUS Comst. * 

 Comstock, J. H., Rep. U. S. Dept. Ag., 1880, p. 304. 



Female scale circular, dark grayish, i 1-4 to 2 mm. in 

 diameter; exuviae central, somewhat yellowish, not so dis- 

 tinctly orange as that o{ forbcsi. Male scale oblong. 



Median lobes of female anal segment prominent, length 

 and width about equal, distinctly notched on outer margin; 

 second lobe long, equaling about half of median lobe in 

 length, inner angle decidedly developed, pointed, one or 

 more (usually two) small notches on outer margin; third lobe 

 rudimentary. Incisions between median and second lobes, 

 and between second and third lobes marked. A small 

 chitinous process on inner margin of median lobe; a well de- 

 fined process each side of first incision, the inner one slightly 

 the largest; chitinous processes of second incision small but 

 distinct, about equal. Spines small, from median, second 

 and third lobes. Plates small and simple, usually a distinct 

 pair on rudiment of third lobe and from eight to ten smaller 

 inconspicuous ones laterad of these. Ventral grouped glands 

 absent. 



*There are so many papers and bulletins available at the present time upon this, 

 the San Jose scale, and its habits that it is not thought necessary to give here more 

 than a diagnostic description. Some of the articles referred to will be found as 

 follows: Cockerell, Bui. No. 6, Tech. Ser.. Div. Y^-aX,., Dept. Agr. ; Howard, Scale 

 Insects of the Orchard, Yearbook Dept. Agr. 1894. p. 267; Insect Life, Vol. VII, No. 4; 

 Starnes, Bui. 36, Ga. Exp. Sta.: Howard and Marlatt, Bui. No. 3, N. Ser. Div. Ent., 

 U. S. Dept. Agr.; Gould, Buls. 144 and 155, Corn. Univ. Exp. Sta., Ithaca, N, Y.; 

 Webster, Buls. 81 and 103, 0. Exp. Stg, , Wooster, Ohio; Hunter, Kan. Univ. Quart. 

 Jan. 1899. ■ ' . - ■ 



