new species of Vermes; two by Mr. Weed, on the "harvest- 

 men" of Illinois; and one by Prof. Garman, on Illinois rep- 

 tiles and amphibians — 110 pages in all. 



Other articles prepared at the Laboratory during the period 

 covered by this report, but published elsewhere, are as follows: 

 " Note on Chinch-Bug Diseases," " Early Occurrence of the 

 Chinch Bug in the Mississippi Valley," "Arsenical Poisons for 

 the Plum and Peach Curculio," '' Office and Laboratory Organi- 

 zation," "History and Status of Public School Science Work 

 in Illinois," "New and Old Insects," and a "Synopsis of Re- 

 cent Work with Arsenical Insecticides," by myself, and a de- 

 scription of a new gall-fly by Mr. John Marten. 



Other articles prepared by us and now in press, are as fol- 

 lows: " On Some Lake Superior Eutoniostraca," "Preliminary 

 Report upon the Invertebrate Animals inhabiting Lakes Ge- 

 neva and Mendota, Wisconsin," "A Summary History of the 

 Corn-Root Aphis," "On the Life History of the White Grubs," 

 and "Report of Progress in Economic Entomology," by myself; 

 "Life History and Immature Stages of Wireworms," by Mr. C. 

 A. Hart; and " New Notes on the Life History of the Hessian 

 Fly," by Mr. Marten. 



I have addressed, during the two years, fourteen farmers' 

 institutes in various parts of the state and three horticultural 

 societies, and have also lectured before the Chicago Institute 

 and the Cincinnati Natural History Society. 



The accumulation of duplicate insects has reached a point 

 where it is again possible to distribute them to advantage to 

 such public schools as teach regularly the subjects they illus- 

 trate. I consequently sent in 18S9, a circular of inquiry to a 

 number of these schools, from the replies to which a list of 

 schools was made to which sets of insects will be sent during 

 the winter. The specimens available for this distribution 

 (22,000 in number) will be made up into forty sets and sent 

 out as fast as ready, with lists of names, both technical and 

 common, and a pamphlet of economic notes respecting the 

 species related in any important way to agriculture or horti- 

 culture. The amount of work involved in this distribution 

 may be judged in part by the fact that the mere numbering and 

 arrangement of this material in boxes, ready for shipment, 



