200 NEW YORK STATE MUSEUM 



Aquatic Insects of Xew York State. X. Y. State Mtis. Biil. 68. 

 1903. p.199-517, d2 pi. (3 col.) by James <>. Xeedliam Ph.D., 

 professor of biology, Lake Forest rniv.; A. D. MacGilliyray 

 Ph.D., instructor in entomology. O. A. Johannsen M.B., instruc- 

 tor in civil engineering, both of Cornell Univ. ; and K. C. Davis 

 Ph.D., professor of horticulture. West Mrginia Univ. 

 Issued Sep. 2S. 1903. 



Contents 



PAGE PAGE 



Preface 199 Part 5 Aquatic Chrysomelidae 



Part 1 Station Work of the and a Table of the Families 



Summer of 1901. J. G. Need- of Coleopterous Larvae. A. D. 



HAM '2(X) MacGttt.tvbay 288 



Part 2 Food of Brook Trout in Part 6 Aqnatie Nematoeerous 



Bone Pond. J. G. Needham. . 2i^4 ; Diptera. O. A. Johaxnsex. . . 328 



Part 3 Life Histories of Odo- ■ Part 7 Sialididae of North and 



nata suborder Zygoptera. South America. K. C. Davis. 442 



J. G. Needham 218 Exi^lanation of plates 487 



Part 4 Some New Life Histo- List of text figures 491> 



ries of Diptera. J. G. Need- Plates 1-52 face 499 



HAM 279 Index 501 



Sialididae of North and South America liv K. C. Davis. Reprint 

 from X. Y. State :Mus. Bui. GIS. 19u3. p.441-S7 

 Issued Sep. 30, 1903. 

 A systematic and biologic account of this group. 



Two Tree Pe.sts. Country Clentleman, Get. 1, 19u3. t;S:S52^2 



Pear psylla, Psylla pyricola ForsL probably weakened the pear 

 trees at Hartley Hall Pa., so that they were attacked by the fruit tree bark 

 beetle, Scolytus rugulosus Ratz. Destruction of the infested trees 

 by fire is advisable. The maple is probably infested bySesia acerni 

 Clem. Preventive measures are indicated. 



Chinese Lady Bugs. Country Gentleman, Oct. S, 1903, 6S :871is 



Rec-ords establishment and breeding ofChilocorus similis Rossi 

 at Kinderhook N. T. 



INSECT EXCHANGE 



The state collection of inserts contains large numbers of many 

 local, and in some cases somewhat rare forms. This, in connec- 

 tion with the fact that many species are not represented, and 

 specially in view of the economic importance of introduced insects, 

 led us to inaugurate a system of exchanges the past summer. 

 Those offered for exchant):e are. in everv case, onlv such as can be 



