442 NEW YORK STATE MUSEUM 



Insects affecting shade trees 



This group was represented by six plates: 



1 A plate illustrating in detail the life history and habits of the white 

 marked tussock moth, Notolophus leucostigma Abb. and 

 Sm., and the forest tent caterpillar, Clisiocampa disstria Hlibn. 

 [PI. I of author's paper on Insects Injurious to Potest Trees, published 

 in the 4th Annual Report of the Commissioners of Fisheries, Game and Forests], 



2 A plate illustrating in detail the life history and habits of the gipsv 

 moth, Porthetria dispar Linn. [PI. i of 1 6th Report of the State 



Entomologist] . 



3 A plate illustrating in detail the life history and habits of the elm leaf 

 beetle, Galerucella luteola Miill., and the bag or basket worm. 

 Thyridopteryx ephemeraeformis Haw. [PI. i of author's 

 paper on Insects Injurious to Elm Trees, published in the ^th Annual Report 

 of the Commissioners of Fisheries, Game and Forests]. 



4 A plate illustrating the life history and habits of the sugar maple borer, 

 Plagionotus speciosus Say, the twig girdler or tree pruner, 

 Elaphidion villosum Fabr., and the cottony cushion scale, 

 Pulvinaria innumerabilis Rathv. [PI. 3 of the author's 

 paper on Insects Injurious to Maple Trees, published in the 4th Report of the 

 Commissioners of Fisheries, Game and Forests]. 



5 A plate illustrating in detail the life history and habits of the brown 

 tail moth, Euproctis chrysorrhoea Linn. [PI. i of i8th Re- 

 port of the State Entomologist]. 



6 A plate illustrating in detail the life history and habits of the elm borer, 

 Saperda tridentata Oliv., elm snout beetles, M a g d a 1 i s 

 armicollis Say and M. barbita Say, and the elm bark louse, 

 Gossyparia ulmi Goff. [ PI. 3 of author's paper on Insects 

 Injurious to Elm Trees, published in the §th Annual Report of the Commis- 

 sioners of Fisheries, Game and Forests]. 



STUDIES IN CULICIDAE 

 The Culicidae in both adult and larval stages present many inter- 

 esting modifications which are reflected to a greater or less extent 

 in their life history and habits. The latter are frequently of con- 

 siderable economic importance and therefore a knowledge of the 

 former is exceedingly desirable. The following studies have for 

 their object a better understanding of the group and more par- 

 ticularly a clearer delimitation of species because recently there has 

 been in more than one instance a sad confusion of distinct forms. 

 Experience has shown the difficulty of drawing specific lines even 

 when one was sure that he was dealing with two forms. It some- 

 times occurs in this group that widely divergent adults produce 

 very similar larvae and conversely that easily separable larvae 

 transform to adults which can be distinguished from each other 

 only with great difficulty. These vexatious problems can be solved 

 satisfactorily only by careful rearing and thorough study of all the 



