THE NATIONAL COLLECTION OF COCCIDiE. 3 



Department Collection contained types or cotypes representing prac- 

 tically all of Comstock's work, and examples of the known species 

 collected by him, and Mr, Theo. Pergande undertook, during the 

 years following 1880, to identify the material which Avas sent to the 

 Department by comparison with named material in the collection. 

 Mr. Pergande's work during this period was of great value to the 

 Bureau and to the entomologists in this country, but necessarily 

 much that came in could not be identified, and there was a large 

 accumulation of unnamed material representing in part old species 

 and in part species new to science. 



Mr. H. G. Hubbard, who has already been referred to as having 

 published an important paper on remedies for Coccida? in the Annual 

 Report of the Department for 1881, continued his investigation of 

 orange insects and the means of controlling them, at Crescent City, 

 Fla., as an agent of the Department of Agriculture, and published in 

 1885 his excellent report entitled " Insects Affecting the Orange." 

 This represented nearly four years' study and experiment, and dealt 

 very largely with the common scale enemies of the orange. Mr. Hub- 

 bard's interest in scale insects, aroused in this study, continued, 

 although he published nothing noteworthy afterwards on the subject. 

 It was, however, his intention to bring out a new and thoroughly 

 revised edition of his Orange Insects, and to take up in connection 

 with it a study of the classification of Coccidss; but his untimely 

 death prevented the accomplishment of this task. 



About 1891 Prof. T. D, A. Cockerell began to collect and study 

 the Cocciclse of Jamaica, where he was then stationed. For some 

 years much of his material came to this office for determination, but 

 in a short time he became familiar with the subject, and ultimately 

 the world's best authority in the group, and for a period of several 

 years much of the new material coming to the Department was sent 

 to him for determination and description. Professor Cockerell had 

 in the meantime accepted a position in the New Mexico Agricultural 

 College, and his collections and descriptions of Coccidse were enriched 

 by the inclusion of many new southwestern species as well as by 

 material which came to him from all quarters of the world. Very 

 fortunately his close cooperation and sympathy with the Bureau of 

 Entomology and interest in the National Collection led him to deposit 

 his types in Washington, thus very greatly enriching the local collec- 

 tion. Professor Cockerell, while diminishing very much his activity 

 in this group in later years, has retained his interest. During his 

 most active decade his publications on CoccidaB were voluminous, 

 much exceeding the work of any other investigators in this field with 

 the possible exception of Signoret and Maskell. In connection with 

 this Bureau he published several papers, notably his bulletin on the 



