34 



* 1^80, Comstock, Rept. U. S. Commr. Agri., pp. 304-305. 



1897, Lowe, 16th Ann. Rept. N. Y. Agri. Exp. Sta., p. 452-458. 



1901, Records of Div. N. & O. Insp. Ohio Dept. Agri. 



Aspidiotus forbesi Johnson. Forbes Scale. "Occurs on peach, plum„ 

 apple, pear, Robiniae psevJacacia and cHmbing Jasmine." 



1902, Scott, Bui. 26, n. s. Div. Ent. U. S. Dept. Agri., p. 49-50. 



Aspidiotus rapax Comst. The Greedy Scale. Sucking the sap from 

 the trunk and larger branches of the black locust and a large nivmber 

 of other trees. 



* 1880, Comstock, Rept. U. S. Commr. Agri., pp. 307-308. 

 1890, Packard, 5th Rept. U. S. Ent. Comm., pp. 371-372. 



Aspidiotus fuglans-regiae Comst. The English Walnut Scale. 

 Infests the twigs of black locust. 



* 1880, Comstock, Rept. U. S. Commr. Agri., pp. 300-301. 

 1899, Smith, 27th Ann. Rept. N. J. State Bd. Agri., p. 113. 



1905, Collected by writer on black locust twigs on Ohio State Uni- 

 versity campus. 



Chionaspis gleditsicB Sanders. 



1905, Collected by writer on black locust twigs on Ohio State Uni- 

 versity campus. 



Pulvinaria innumerabilis Rathv. The Cottony Maple Scale. 

 While the favorite food plant of this common scale insect is the silver 

 maple (Acer saccharimim) , it is found upon a large number of species of 

 trees, among which is the black locust. On this latter tree it seldom 

 assumes a serious aspect, as the individuals are so few in number and are- 

 quite often parasitized. 



Until nearly full grown they resemble very closely the Lecaniums, 

 but when the female reaches maturity and begins to lay eggs, from May 

 until July, one end of the scale is raised by the mass of waxy, filamentous- 

 material in which the eggs are deposited. Not only is the scale raised, but 

 this material is pushed out, forming a white, fluffy mass, about twice the 

 size of the scale itself. According to different authorities, each female- 

 lays from three hundred to one thousand eggs, after which she dies ; but 

 the scale remains upon the twig sometimes for a year, fastened there by 

 the mass of fibrous material. 



This scale insect enjoys the distinction of serving as the host for a 

 lepidopterous parasite: Laetilia coccidivora Comst. The adult moth 

 deposits its eggs in the cottony masses where her larvae develop. After 



* Original description. 



